diff --git a/libraries/StringMB.class.php b/libraries/StringMB.class.php
deleted file mode 100644
index 402907cbea..0000000000
--- a/libraries/StringMB.class.php
+++ /dev/null
@@ -1,321 +0,0 @@
-<?php
-/* vim: set expandtab sw=4 ts=4 sts=4: */
-/**
- * Implements PMA_StringByte interface using the "mbstring" extension.
- *
- * @package    PhpMyAdmin-String
- * @subpackage MB
- */
-if (! defined('PHPMYADMIN')) {
-    exit;
-}
-
-require_once 'libraries/StringByte.int.php';
-
-/**
- * Implements PMA_StringByte interface using the "mbstring" extension.
- *
- * @package    PhpMyAdmin-String
- * @subpackage MB
- */
-class PMA_StringMB implements PMA_StringByte
-{
-    /**
-     * Returns length of string depending on current charset.
-     *
-     * @param string $string string to count
-     *
-     * @return int|false string length
-     */
-
-    public function strlen($string)
-    {
-        return mb_strlen($string);
-    }
-
-    /**
-     * Returns substring from string, works depending on current charset.
-     *
-     * @param string $string string to count
-     * @param int    $start  start of substring
-     * @param int    $length length of substring
-     *
-     * @return string|false the sub string
-     */
-    public function substr($string, $start, $length = 2147483647)
-    {
-        $stringLength = $this->strlen($string);
-        if ($stringLength <= $start) {
-            return false;
-        }
-        if ($stringLength + $length < $start) {
-            return false;
-        }
-
-        return mb_substr($string, $start, $length, 'utf-8');
-    }
-
-    /**
-     * Returns number of substring from string.
-     *
-     * @param string $string string to check
-     * @param int    $needle string to count
-     *
-     * @return int number of substring from the string
-     */
-    public function substrCount($string, $needle)
-    {
-        return mb_substr_count($string, $needle, 'utf-8');
-    }
-
-    /**
-     * Returns position of $needle in $haystack or false if not found
-     *
-     * @param string $haystack the string being checked
-     * @param string $needle   the string to find in haystack
-     * @param int    $offset   the search offset
-     *
-     * @return int|false position of $needle in $haystack or false
-     */
-    public function strpos($haystack, $needle, $offset = 0)
-    {
-        if (null === $haystack) {
-            return false;
-        }
-        if (false === $needle) {
-            return false;
-        }
-        if (!is_string($needle) && is_numeric($needle)) {
-            $needle = (int)$needle;
-            $needle = $this->chr($needle);
-        }
-        return mb_strpos($haystack, $needle, $offset);
-    }
-
-    /**
-     * Returns position of $needle in $haystack - case insensitive - or false if
-     * not found
-     *
-     * @param string $haystack the string being checked
-     * @param string $needle   the string to find in haystack
-     * @param int    $offset   the search offset
-     *
-     * @return int|false position of $needle in $haystack or false
-     */
-    public function stripos($haystack, $needle, $offset = 0)
-    {
-        if (null === $haystack) {
-            return false;
-        }
-        if (false === $needle) {
-            return false;
-        }
-        if (!is_string($needle) && is_numeric($needle)) {
-            $needle = (int)$needle;
-            $needle = $this->chr($needle);
-        }
-        return mb_stripos($haystack, $needle, $offset);
-    }
-
-    /**
-     * Returns position of last $needle in $haystack or false if not found
-     *
-     * @param string $haystack the string being checked
-     * @param string $needle   the string to find in haystack
-     * @param int    $offset   the search offset
-     *
-     * @return int|false position of last $needle in $haystack or false
-     */
-    public function strrpos($haystack, $needle, $offset = 0)
-    {
-        if (null === $haystack) {
-            return false;
-        }
-        if (false === $needle) {
-            return false;
-        }
-        if (!is_string($needle) && is_numeric($needle)) {
-            $needle = (int)$needle;
-            $needle = $this->chr($needle);
-        }
-        return mb_strrpos($haystack, $needle, $offset);
-    }
-
-    /**
-     * Returns position of last $needle in $haystack - case insensitive - or false
-     * if not found
-     *
-     * @param string $haystack the string being checked
-     * @param string $needle   the string to find in haystack
-     * @param int    $offset   the search offset
-     *
-     * @return int|false position of last $needle in $haystack or false
-     */
-    public function strripos($haystack, $needle, $offset = 0)
-    {
-        if (null === $haystack) {
-            return false;
-        }
-        if (false === $needle) {
-            return false;
-        }
-        if (!is_string($needle) && is_numeric($needle)) {
-            $needle = (int)$needle;
-            $needle = $this->chr($needle);
-        }
-        return mb_strripos($haystack, $needle, $offset);
-    }
-
-    /**
-     * Returns part of $haystack string starting from and including the first
-     * occurrence of $needle to the end of $haystack or false if not found
-     *
-     * @param string $haystack      the string being checked
-     * @param string $needle        the string to find in haystack
-     * @param bool   $before_needle the part before the needle
-     *
-     * @return string|false part of $haystack or false
-     */
-    public function strstr($haystack, $needle, $before_needle = false)
-    {
-        if (!is_string($needle) && is_numeric($needle)) {
-            $needle = (int)$needle;
-            $needle = $this->chr($needle);
-        }
-        if (!is_string($haystack) || !is_string($needle) || null === $needle) {
-            return false;
-        }
-        return mb_strstr($haystack, $needle, $before_needle);
-    }
-
-    /**
-     * Returns part of $haystack string starting from and including the first
-     * occurrence of $needle to the end of $haystack - case insensitive - or false
-     * if not found
-     *
-     * @param string $haystack      the string being checked
-     * @param string $needle        the string to find in haystack
-     * @param bool   $before_needle the part before the needle
-     *
-     * @return string|false part of $haystack or false
-     */
-    public function stristr($haystack, $needle, $before_needle = false)
-    {
-        if (!is_string($needle) && is_numeric($needle)) {
-            $needle = (int)$needle;
-            $needle = $this->chr($needle);
-        }
-        if (!is_string($haystack) || !is_string($needle) || null === $needle) {
-            return false;
-        }
-        return mb_stristr($haystack, $needle, $before_needle);
-    }
-
-    /**
-     * Returns the portion of haystack which starts at the last occurrence or false
-     * if not found
-     *
-     * @param string $haystack the string being checked
-     * @param string $needle   the string to find in haystack
-     *
-     * @return string|false portion of haystack which starts at the last occurrence or
-     * false
-     */
-    public function strrchr($haystack, $needle)
-    {
-        if (!is_string($needle) && is_numeric($needle)) {
-            $needle = (int)$needle;
-            $needle = $this->chr($needle);
-        }
-        if (!is_string($haystack) || !is_string($needle) || null === $needle) {
-            return false;
-        }
-        return mb_strrchr($haystack, $needle);
-    }
-
-    /**
-     * Make a string lowercase
-     *
-     * @param string $string the string being lowercased
-     *
-     * @return string the lower case string
-     */
-    public function strtolower($string)
-    {
-        return mb_strtolower($string);
-    }
-
-    /**
-     * Make a string uppercase
-     *
-     * @param string $string the string being uppercased
-     *
-     * @return string the upper case string
-     */
-    public function strtoupper($string)
-    {
-        return mb_strtoupper($string);
-    }
-
-    /**
-     * Get the ordinal value of a multibyte string
-     * (Adapted from http://www.php.net/manual/en/function.ord.php#72463)
-     *
-     * @param string $string the string for which ord is required
-     *
-     * @return string the ord value
-     */
-    public function ord($string)
-    {
-        if (false === $string || null === $string || '' === $string) {
-            return 0;
-        }
-
-        $str = mb_convert_encoding($string, "UCS-4BE", "UTF-8");
-        $substr = mb_substr($str, 0, 1, "UCS-4BE");
-        $val = unpack("N", $substr);
-        return $val[1];
-    }
-
-    /**
-     * Get the multibyte character of an ASCII
-     * (from http://fr2.php.net/manual/en/function.chr.php#69082)
-     *
-     * @param int $ascii the ASCII code for which character is required
-     *
-     * @return string the multibyte character
-     */
-    public function chr($ascii)
-    {
-        return mb_convert_encoding(
-            pack("N", $ascii),
-            mb_internal_encoding(),
-            'UCS-4BE'
-        );
-    }
-
-    /**
-     * Perform a regular expression match
-     *
-     * Take care: might not work with lookbehind expressions.
-     *
-     * @param string $pattern Pattern to search for
-     * @param string $subject Input string
-     * @param int    $offset  Start from search
-     *
-     * @return int|false 1 if matched, 0 if doesn't, false on failure
-     */
-    public function pregStrpos($pattern, $subject, $offset = 0)
-    {
-        $matches = array();
-        $bFind = preg_match(
-            $pattern, $this->substr($subject, $offset), $matches, PREG_OFFSET_CAPTURE
-        );
-        if (1 !== $bFind) {
-            return false;
-        }
-
-        return $matches[1][1] + $offset;
-    }
-}
-?>
diff --git a/libraries/StringNative.class.php b/libraries/StringNative.class.php
deleted file mode 100644
index ce07e0a8a1..0000000000
--- a/libraries/StringNative.class.php
+++ /dev/null
@@ -1,246 +0,0 @@
-<?php
-/* vim: set expandtab sw=4 ts=4 sts=4: */
-/**
- * Implements PMA_StringByte interface using native PHP functions.
- *
- * @package    PhpMyAdmin-String
- * @subpackage Native
- */
-if (! defined('PHPMYADMIN')) {
-    exit;
-}
-
-require_once 'libraries/StringByte.int.php';
-
-/**
- * Implements PMA_StringByte interface using native PHP functions.
- *
- * @package    PhpMyAdmin-String
- * @subpackage Native
- */
-class PMA_StringNative implements PMA_StringByte
-{
-    /**
-     * Returns length of string depending on current charset.
-     *
-     * @param string $string string to count
-     *
-     * @return int|false string length
-     */
-    public function strlen($string)
-    {
-        return strlen($string);
-    }
-
-    /**
-     * Returns substring from string, works depending on current charset.
-     *
-     * @param string $string string to count
-     * @param int    $start  start of substring
-     * @param int    $length length of substring
-     *
-     * @return string|false the sub string
-     */
-    public function substr($string, $start, $length = 2147483647)
-    {
-        return substr($string, $start, $length);
-    }
-
-    /**
-     * Returns number of substring from string.
-     *
-     * @param string $string string to check
-     * @param int    $needle string to count
-     *
-     * @return int number of substring from the string
-     */
-    public function substrCount($string, $needle)
-    {
-        return substr_count($string, $needle);
-    }
-
-    /**
-     * Returns position of $needle in $haystack or false if not found
-     *
-     * @param string $haystack the string being checked
-     * @param string $needle   the string to find in haystack
-     * @param int    $offset   the search offset
-     *
-     * @return int|false position of $needle in $haystack or false
-     */
-    public function strpos($haystack, $needle, $offset = 0)
-    {
-        return strpos($haystack, $needle, $offset);
-    }
-
-    /**
-     * Returns position of $needle in $haystack - case insensitive - or false if
-     * not found
-     *
-     * @param string $haystack the string being checked
-     * @param string $needle   the string to find in haystack
-     * @param int    $offset   the search offset
-     *
-     * @return int|false position of $needle in $haystack or false
-     */
-    public function stripos($haystack, $needle, $offset = 0)
-    {
-        if (('' === $haystack || false === $haystack)
-            && $offset >= $this->strlen($haystack)
-        ) {
-            return false;
-        }
-        return stripos($haystack, $needle, $offset);
-    }
-
-    /**
-     * Returns position of last $needle in $haystack or false if not found
-     *
-     * @param string $haystack the string being checked
-     * @param string $needle   the string to find in haystack
-     * @param int    $offset   the search offset
-     *
-     * @return int|false position of last $needle in $haystack or false
-     */
-    public function strrpos($haystack, $needle, $offset = 0)
-    {
-        return strrpos($haystack, $needle, $offset);
-    }
-
-    /**
-     * Returns position of last $needle in $haystack - case insensitive - or false
-     * if not found
-     *
-     * @param string $haystack the string being checked
-     * @param string $needle   the string to find in haystack
-     * @param int    $offset   the search offset
-     *
-     * @return int|false position of last $needle in $haystack or false
-     */
-    public function strripos($haystack, $needle, $offset = 0)
-    {
-        if (('' === $haystack || false === $haystack)
-            && $offset >= $this->strlen($haystack)
-        ) {
-            return false;
-        }
-        return strripos($haystack, $needle, $offset);
-    }
-
-    /**
-     * Returns part of $haystack string starting from and including the first
-     * occurrence of $needle to the end of $haystack or false if not found
-     *
-     * @param string $haystack      the string being checked
-     * @param string $needle        the string to find in haystack
-     * @param bool   $before_needle the part before the needle
-     *
-     * @return string|false part of $haystack or false
-     */
-    public function strstr($haystack, $needle, $before_needle = false)
-    {
-        return strstr($haystack, $needle, $before_needle);
-    }
-
-    /**
-     * Returns part of $haystack string starting from and including the first
-     * occurrence of $needle to the end of $haystack - case insensitive - or false
-     * if not found
-     *
-     * @param string $haystack      the string being checked
-     * @param string $needle        the string to find in haystack
-     * @param bool   $before_needle the part before the needle
-     *
-     * @return string|false part of $haystack or false
-     */
-    public function stristr($haystack, $needle, $before_needle = false)
-    {
-        return stristr($haystack, $needle, $before_needle);
-    }
-
-    /**
-     * Returns the portion of haystack which starts at the last occurrence or false
-     * if not found
-     *
-     * @param string $haystack the string being checked
-     * @param string $needle   the string to find in haystack
-     *
-     * @return string|false portion of haystack which starts at the last occurrence
-     *                      or false
-     */
-    public function strrchr($haystack, $needle)
-    {
-        return strrchr($haystack, $needle);
-    }
-
-    /**
-     * Make a string lowercase
-     *
-     * @param string $string the string being lowercased
-     *
-     * @return string the lower case string
-     */
-    public function strtolower($string)
-    {
-        return strtolower($string);
-    }
-
-    /**
-     * Make a string uppercase
-     *
-     * @param string $string the string being uppercased
-     *
-     * @return string the upper case string
-     */
-    public function strtoupper($string)
-    {
-        return strtoupper($string);
-    }
-
-    /**
-     * Perform a regular expression match
-     *
-     * @param string $pattern Pattern to search for
-     * @param string $subject Input string
-     * @param int    $offset  Start from search
-     *
-     * @return int|false 1 if matched, 0 if doesn't, false on failure
-     */
-    public function pregStrpos($pattern, $subject, $offset = 0)
-    {
-        $matches = array();
-        $bFind = preg_match(
-            $pattern, $subject, $matches, PREG_OFFSET_CAPTURE, $offset
-        );
-        if (1 !== $bFind) {
-            return false;
-        }
-
-        return $matches[1][1];
-    }
-
-    /**
-     * Get the ordinal value of a string
-     *
-     * @param string $string the string for which ord is required
-     *
-     * @return int the ord value
-     */
-    public function ord($string)
-    {
-        return ord($string);
-    }
-
-    /**
-     * Get the character of an ASCII
-     *
-     * @param int $ascii the ASCII code for which character is required
-     *
-     * @return string the character
-     */
-    public function chr($ascii)
-    {
-        return chr($ascii);
-    }
-};
-?>
diff --git a/test/libraries/PMA_String_Compare_test.php b/test/libraries/PMA_String_Compare_test.php
deleted file mode 100644
index 582cb9da3d..0000000000
--- a/test/libraries/PMA_String_Compare_test.php
+++ /dev/null
@@ -1,1259 +0,0 @@
-<?php
-/* vim: set expandtab sw=4 ts=4 sts=4: */
-/**
- * Tests to compare String Functions for phpMyAdmin
- *
- * @package PhpMyAdmin-test
- */
-
-/*
- * Include to test.
- */
-require_once 'libraries/StringNative.class.php';
-require_once 'libraries/StringMB.class.php';
-
-/**
- * Tests to compare String Functions for phpMyAdmin
- *
- * @package PhpMyAdmin-test
- */
-class PMA_String_Compare_Test extends PHPUnit_Framework_TestCase
-{
-    /**
-     * @var PMA_StringNative
-     */
-    private $_native;
-
-    /**
-     * @var PMA_StringMB
-     */
-    private $_mb;
-
-    /**
-     * Setup function for test cases
-     *
-     * @access protected
-     * @return void
-     */
-    protected function setUp()
-    {
-        if (!@function_exists('mb_strlen')) {
-            $this->markTestSkipped('Multibyte String Functions are not available.');
-        }
-        $this->_native = new PMA_StringNative();
-        $this->_mb = new PMA_StringMB();
-    }
-
-    /**
-     * Tests for strlen
-     *
-     * @param mixed $value Value to test
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStrlen
-     */
-    public function testStrlen($value)
-    {
-        $native = $this->_native->strlen($value);
-        $multibytes = $this->_mb->strlen($value);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native length: ' . var_export($native, true)
-            . ' - mb length: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrlen
-     *
-     * @return array Test data
-     */
-    public function providerStrlen()
-    {
-        return array(
-            array('test'),
-            array('3'),
-            array(''),
-            array(""),
-            array(false),
-            array(true),
-            array(null),
-            array(3),
-            array(10),
-        );
-    }
-
-    /**
-     * Tests for substr
-     *
-     * @param mixed $value  Value to test
-     * @param int   $start  Position to start cutting
-     * @param int   $length Number of characters to cut
-     *
-     * @return void
-     * @test
-     * @dataProvider providerSubstr
-     */
-    public function testSubstr($value, $start, $length = 2147483647)
-    {
-        $native = $this->_native->substr($value, $start, $length);
-        $multibytes = $this->_mb->substr($value, $start, $length);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native substr: ' . var_export($native, true)
-            . ' - mb substr: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testSubstr
-     *
-     * @return array Test data
-     */
-    public function providerSubstr()
-    {
-        return array(
-            array('abcdefabcdef', 0),
-            array('abcdefabcdef', 0, 3),
-            array('abcdefabcdef', 0, 10),
-            array('abcdefabcdef', 0, -2),
-            array('abcdefabcdef', 2),
-            array('abcdefabcdef', 2, 3),
-            array('abcdefabcdef', 2, 10),
-            array('abcdefabcdef', 2, -1),
-            array('abcdefabcdef', 2, -4),
-            array('abcdefabcdef', 2, -5),
-            array('abcdefabcdef', 6),
-            array('abcdefabcdef', 6, 2),
-            array('abcdefabcdef', 6, 10),
-            array('abcdefabcdef', 6, -4),
-            array('abcdefabcdef', -3),
-            array('abcdefabcdef', -3, 1),
-            array('abcdefabcdef', -3, 10),
-            array('abcdefabcdef', -3, -1),
-            array('abcdefabcdef', -3, -3),
-            array('abcdefabcdef', -3, -5),
-            array(false, 0),
-            array(false, 0, 2),
-            array(false, 10),
-            array(false, 10, 2),
-            array(true, 0),
-            array(true, 0, 1),
-            array(true, 0, 10),
-            array(true, 0, -1),
-            array(true, 0, -10),
-            array(true, 10),
-            array(true, 10, 1),
-            array(true, 10, 10),
-            array(true, 10, -3),
-            array(3, 0),
-            array(3, 0, 1),
-            array(3, 0, 2),
-            array(3, 0, -1),
-            array(3, 10),
-            array(3, 10, 1),
-            array(3, 10, 10),
-            array(3, 10, -1),
-            array('3', 0),
-            array('3', 0, 1),
-            array('3', 0, 2),
-            array('3', 0, -1),
-            array('3', 10),
-            array('3', 10, 1),
-            array('3', 10, 10),
-            array('3', 10, -1),
-            array('', 0),
-            array('', 0, 1),
-            array('', 0, 10),
-            array('', 0, -1),
-            array('', 10),
-            array('', 10, 1),
-            array('', 10, 10),
-            array('', 10, -1),
-            array(null, 10),
-            array(null, 10, 1),
-            array(null, 10, 10),
-            array(null, 10, -1),
-        );
-    }
-
-    /**
-     * Tests for substr_count
-     *
-     * @param string $haystack String to look into
-     * @param int    $needle   String to look for
-     *
-     * @return void
-     * @test
-     * @dataProvider providerSubstrCount
-     */
-    public function testSubstrCount($haystack, $needle)
-    {
-        $native = $this->_native->substrCount($haystack, $needle);
-        $multibytes = $this->_mb->substrCount($haystack, $needle);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native substrCount: ' . var_export($native, true)
-            . ' - mb substrCount: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testSubstrCount
-     *
-     * @return array Test data
-     */
-    public function providerSubstrCount()
-    {
-        return array(
-            array('abcdefabcdef', 'a'),
-            array('abcdefabcdef', 'ab'),
-            array('abcdefabcdef', 'ba'),
-            array('abcdefabcdef', 'A'),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'z'),
-            array(false, 'a'),
-            array(false, 0),
-            array(true, 0),
-            array(true, 0, 1),
-            array(true, 1),
-            array(true, 1, 1),
-            array(3, 0),
-            array(3, 3),
-            array(3, '3'),
-            array('3', '3'),
-            array(null, 0),
-            array('', 0),
-        );
-    }
-
-    /**
-     * Tests for substr_count
-     *
-     * @param string $haystack String to look into
-     * @param int    $needle   String to look for
-     *
-     * @return void
-     * @test
-     * @dataProvider providerSubstrCountException
-     */
-    public function testSubstrCountException($haystack, $needle)
-    {
-        $native = null;
-        $multibytes = null;
-        $nativeException = false;
-        $multibytesException = false;
-        try {
-            $native = $this->_native->substrCount($haystack, $needle);
-        } catch (PHPUnit_Framework_Error $e) {
-            $nativeException = true;
-        }
-        try {
-            $multibytes = $this->_mb->substrCount($haystack, $needle);
-        } catch (PHPUnit_Framework_Error $e) {
-            $multibytesException = true;
-        }
-
-        $this->assertTrue(
-            true === $nativeException && true === $multibytesException,
-            'native substrCount: ' . var_export($native, true)
-            . ' - mb substrCount: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testSubstrCountException
-     *
-     * @return array Test data
-     */
-    public function providerSubstrCountException()
-    {
-        return array(
-            array('abcdefabcdef', false),
-            array(false, false),
-            array(null, false),
-            array('', false),
-        );
-    }
-
-    /**
-     * Tests for strpos
-     *
-     * @param string $haystack String to search in
-     * @param mixed  $needle   Characters to search
-     * @param int    $offset   Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStrpos
-     */
-    public function testStrpos($haystack, $needle, $offset = 0)
-    {
-        $native = $this->_native->strpos($haystack, $needle, $offset);
-        $multibytes = $this->_mb->strpos($haystack, $needle, $offset);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native strpos: ' . var_export($native, true)
-            . ' - mb strpos: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrpos
-     *
-     * @return array Test data
-     */
-    public function providerStrpos()
-    {
-        return array(
-            array('abcdefabcdef', 'a'),
-            array('abcdefabcdef', 'a', 2),
-            array('abcdefabcdef', 'a', 10),
-            array('abcdefabcdef', 'A'),
-            array('abcdefabcdef', 'A', 2),
-            array('abcdefabcdef', 'A', 10),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'e', 2),
-            array('abcdefabcdef', 'e', 10),
-            array('abcdefabcdef', 'z'),
-            array('abcdefabcdef', 'z', 2),
-            array('abcdefabcdef', ord('a')),
-            array('abcdefabcdef', ord('a'), 2),
-            array('abcdefabcdef', ord('A')),
-            array('abcdefabcdef', ord('A'), 2),
-            array('abcdefabcdef', ord('e')),
-            array('abcdefabcdef', ord('e'), 2),
-            array('abcdefabcdef', ord('z')),
-            array('abcdefabcdef', ord('z'), 2),
-            array('abcdefabcdef', false),
-            array(false, 'a'),
-            array(false, 0),
-            array(false, false),
-            array(true, 0),
-            array(true, 0, 1),
-            array(true, 1),
-            array(true, 1, 1),
-            array(3, 0),
-            array(3, 3),
-            array(3, '3'),
-            array('3', '3'),
-            array(null, 0),
-            array(null, false),
-            array('', 0),
-            array('', false),
-        );
-    }
-
-    /**
-     * Tests for strpos
-     *
-     * @param string $haystack String to search in
-     * @param mixed  $needle   Characters to search
-     * @param int    $offset   Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStrposException
-     */
-    public function testStrposException($haystack, $needle, $offset = 0)
-    {
-        $native = null;
-        $multibytes = null;
-        $nativeException = false;
-        $multibytesException = false;
-        try {
-            $native = $this->_native->strpos($haystack, $needle, $offset);
-        } catch (PHPUnit_Framework_Error $e) {
-            $nativeException = true;
-        }
-        try {
-            $multibytes = $this->_mb->strpos($haystack, $needle, $offset);
-        } catch (PHPUnit_Framework_Error $e) {
-            $multibytesException = true;
-        }
-
-        $this->assertTrue(
-            true === $nativeException && true === $multibytesException,
-            'native strpos: ' . var_export($native, true)
-            . ' - mb strpos: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrposException
-     *
-     * @return array Test data
-     */
-    public function providerStrposException()
-    {
-        return array(
-            array('abcdefabcdef', 'a', 20),
-            array('abcdefabcdef', 'e', 20),
-            array('abcdefabcdef', 'z', 20),
-            array('abcdefabcdef', ord('a'), 20),
-            array('abcdefabcdef', ord('e'), 20),
-            array('abcdefabcdef', ord('z'), 20),
-            array(false, 0, 1),
-            array(3, 0, 2),
-            array(3, 3, 2),
-            array(3, '3', 2),
-            array('3', '3', 2),
-            array('', 0, 2),
-        );
-    }
-
-    /**
-     * Tests for stripos
-     *
-     * @param string $haystack String to search in
-     * @param mixed  $needle   Characters to search
-     * @param int    $offset   Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStripos
-     */
-    public function testStripos($haystack, $needle, $offset = 0)
-    {
-        $native = $this->_native->stripos($haystack, $needle, $offset);
-        $multibytes = $this->_mb->stripos($haystack, $needle, $offset);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native stripos: ' . var_export($native, true)
-            . ' - mb stripos: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStripos
-     *
-     * @return array Test data
-     */
-    public function providerStripos()
-    {
-        return array(
-            array('abcdefabcdef', 'a'),
-            array('abcdefabcdef', 'a', 2),
-            array('abcdefabcdef', 'a', 10),
-            array('abcdefabcdef', 'A'),
-            array('abcdefabcdef', 'A', 2),
-            array('abcdefabcdef', 'A', 10),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'e', 2),
-            array('abcdefabcdef', 'e', 10),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'z'),
-            array('abcdefabcdef', 'z', 2),
-            array('abcdefabcdef', ord('a')),
-            array('abcdefabcdef', ord('a'), 2),
-            array('abcdefabcdef', ord('A')),
-            array('abcdefabcdef', ord('A'), 2),
-            array('abcdefabcdef', ord('e')),
-            array('abcdefabcdef', ord('e'), 2),
-            array('abcdefabcdef', ord('z')),
-            array('abcdefabcdef', ord('z'), 2),
-            array('abcdefabcdef', false),
-            array(false, 'a'),
-            array(false, 0),
-            array(false, 0, 1),
-            array(false, false),
-            array(true, 0),
-            array(true, 0, 1),
-            array(true, 1),
-            array(true, 1, 1),
-            array(3, 0),
-            array(3, 3),
-            array(3, '3'),
-            array('3', '3'),
-            array(null, 0),
-            array(null, false),
-            array('', 0),
-            array('', 0, 2),
-            array('', false),
-        );
-    }
-
-    /**
-     * Tests for stripos
-     *
-     * @param string $haystack String to search in
-     * @param mixed  $needle   Characters to search
-     * @param int    $offset   Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStriposException
-     */
-    public function testStriposException($haystack, $needle, $offset = 0)
-    {
-        $native = null;
-        $multibytes = null;
-        $nativeException = false;
-        $multibytesException = false;
-        try {
-            $native = $this->_native->stripos($haystack, $needle, $offset);
-        } catch (PHPUnit_Framework_Error $e) {
-            $nativeException = true;
-        }
-        try {
-            $multibytes = $this->_mb->stripos($haystack, $needle, $offset);
-        } catch (PHPUnit_Framework_Error $e) {
-            $multibytesException = true;
-        }
-
-        $this->assertTrue(
-            true === $nativeException && true === $multibytesException,
-            'native stripos: ' . var_export($native, true)
-            . ' - mb stripos: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStriposException
-     *
-     * @return array Test data
-     */
-    public function providerStriposException()
-    {
-        return array(
-            array('abcdefabcdef', 'a', 20),
-            array('abcdefabcdef', 'e', 20),
-            array('abcdefabcdef', 'z', 20),
-            array('abcdefabcdef', ord('a'), 20),
-            array('abcdefabcdef', ord('e'), 20),
-            array('abcdefabcdef', ord('z'), 20),
-            array(3, 0, 2),
-            array(3, 3, 2),
-            array(3, '3', 2),
-            array('3', '3', 2),
-        );
-    }
-
-    /**
-     * Tests for strrpos
-     *
-     * @param string $haystack String to search in
-     * @param mixed  $needle   Characters to search
-     * @param int    $offset   Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStrrpos
-     */
-    public function testStrrpos($haystack, $needle, $offset = 0)
-    {
-        $native = $this->_native->strrpos($haystack, $needle, $offset);
-        $multibytes = $this->_mb->strrpos($haystack, $needle, $offset);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native strrpos: ' . var_export($native, true)
-            . ' - mb strrpos: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrrpos
-     *
-     * @return array Test data
-     */
-    public function providerStrrpos()
-    {
-        return array(
-            array('abcdefabcdef', 'a'),
-            array('abcdefabcdef', 'a', 2),
-            array('abcdefabcdef', 'a', 10),
-            array('abcdefabcdef', 'a', -10),
-            array('abcdefabcdef', 'A'),
-            array('abcdefabcdef', 'A', 2),
-            array('abcdefabcdef', 'A', 10),
-            array('abcdefabcdef', 'A', -10),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'e', 2),
-            array('abcdefabcdef', 'e', 10),
-            array('abcdefabcdef', 'e', -2),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'z'),
-            array('abcdefabcdef', 'z', 2),
-            array('abcdefabcdef', 'z', -2),
-            array('abcdefabcdef', ord('a')),
-            array('abcdefabcdef', ord('a'), 2),
-            array('abcdefabcdef', ord('a'), -2),
-            array('abcdefabcdef', ord('A')),
-            array('abcdefabcdef', ord('A'), 2),
-            array('abcdefabcdef', ord('A'), -2),
-            array('abcdefabcdef', ord('e')),
-            array('abcdefabcdef', ord('e'), 2),
-            array('abcdefabcdef', ord('e'), -2),
-            array('abcdefabcdef', ord('z')),
-            array('abcdefabcdef', ord('z'), 2),
-            array('abcdefabcdef', ord('z'), -2),
-            array('abcdefabcdef', false),
-            array(false, 'a'),
-            array(false, 0),
-            array(false, 0, 1),
-            array(false, false),
-            array(true, 0),
-            array(true, 0, 1),
-            array(true, 1),
-            array(true, 1, 1),
-            array(3, 0),
-            array(3, 3),
-            array(3, '3'),
-            array('3', '3'),
-            array(null, 0),
-            array(null, false),
-            array('', 0),
-            array('', 0, 2),
-            array('', false),
-        );
-    }
-
-    /**
-     * Tests for strrpos
-     *
-     * @param string $haystack String to search in
-     * @param mixed  $needle   Characters to search
-     * @param int    $offset   Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStrrposException
-     */
-    public function testStrrposException($haystack, $needle, $offset = 0)
-    {
-        $native = null;
-        $multibytes = null;
-        $nativeException = false;
-        $multibytesException = false;
-        try {
-            $native = $this->_native->strrpos($haystack, $needle, $offset);
-        } catch (PHPUnit_Framework_Error $e) {
-            $nativeException = true;
-        }
-        try {
-            $multibytes = $this->_mb->strrpos($haystack, $needle, $offset);
-        } catch (PHPUnit_Framework_Error $e) {
-            $multibytesException = true;
-        }
-
-        $this->assertTrue(
-            true === $nativeException && true === $multibytesException,
-            'native strrpos: ' . var_export($native, true)
-            . ' - mb strrpos: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrrposException
-     *
-     * @return array Test data
-     */
-    public function providerStrrposException()
-    {
-        return array(
-            array('abcdefabcdef', 'a', 20),
-            array('abcdefabcdef', 'a', -20),
-            array('abcdefabcdef', 'e', 20),
-            array('abcdefabcdef', 'e', -20),
-            array('abcdefabcdef', 'z', 20),
-            array('abcdefabcdef', 'z', -20),
-            array('abcdefabcdef', ord('a'), 20),
-            array('abcdefabcdef', ord('e'), 20),
-            array('abcdefabcdef', ord('z'), 20),
-            array(3, 0, 2),
-            array(3, 3, 2),
-            array(3, '3', 2),
-            array('3', '3', 2),
-        );
-    }
-
-    /**
-     * Tests for strripos
-     *
-     * @param string $haystack String to search in
-     * @param mixed  $needle   Characters to search
-     * @param int    $offset   Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStrripos
-     */
-    public function testStrripos($haystack, $needle, $offset = 0)
-    {
-        $native = $this->_native->strripos($haystack, $needle, $offset);
-        $multibytes = $this->_mb->strripos($haystack, $needle, $offset);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native strripos: ' . var_export($native, true)
-            . ' - mb strripos: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrripos
-     *
-     * @return array Test data
-     */
-    public function providerStrripos()
-    {
-        return array(
-            array('abcdefabcdef', 'a'),
-            array('abcdefabcdef', 'a', 2),
-            array('abcdefabcdef', 'a', 10),
-            array('abcdefabcdef', 'a', -10),
-            array('abcdefabcdef', 'A'),
-            array('abcdefabcdef', 'A', 2),
-            array('abcdefabcdef', 'A', 10),
-            array('abcdefabcdef', 'A', -10),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'e', 2),
-            array('abcdefabcdef', 'e', 10),
-            array('abcdefabcdef', 'e', -2),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'z'),
-            array('abcdefabcdef', 'z', 2),
-            array('abcdefabcdef', 'z', -2),
-            array('abcdefabcdef', ord('a')),
-            array('abcdefabcdef', ord('a'), 2),
-            array('abcdefabcdef', ord('a'), -2),
-            array('abcdefabcdef', ord('A')),
-            array('abcdefabcdef', ord('A'), 2),
-            array('abcdefabcdef', ord('A'), -2),
-            array('abcdefabcdef', ord('e')),
-            array('abcdefabcdef', ord('e'), 2),
-            array('abcdefabcdef', ord('e'), -2),
-            array('abcdefabcdef', ord('z')),
-            array('abcdefabcdef', ord('z'), 2),
-            array('abcdefabcdef', ord('z'), -2),
-            array('abcdefabcdef', false),
-            array(false, 'a'),
-            array(false, 0),
-            array(false, 0, 1),
-            array(false, false),
-            array(true, 0),
-            array(true, 0, 1),
-            array(true, 1),
-            array(true, 1, 1),
-            array(3, 0),
-            array(3, 3),
-            array(3, '3'),
-            array('3', '3'),
-            array(null, 0),
-            array(null, false),
-            array('', 0),
-            array('', 0, 2),
-            array('', false),
-        );
-    }
-
-    /**
-     * Tests for strripos
-     *
-     * @param string $haystack String to search in
-     * @param mixed  $needle   Characters to search
-     * @param int    $offset   Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStrriposException
-     */
-    public function testStrriposException($haystack, $needle, $offset = 0)
-    {
-        $native = null;
-        $multibytes = null;
-        $nativeException = false;
-        $multibytesException = false;
-        try {
-            $native = $this->_native->strripos($haystack, $needle, $offset);
-        } catch (PHPUnit_Framework_Error $e) {
-            $nativeException = true;
-        }
-        try {
-            $multibytes = $this->_mb->strripos($haystack, $needle, $offset);
-        } catch (PHPUnit_Framework_Error $e) {
-            $multibytesException = true;
-        }
-
-        $this->assertTrue(
-            true === $nativeException && true === $multibytesException,
-            'native strripos: ' . var_export($native, true)
-            . ' - mb strripos: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrriposException
-     *
-     * @return array Test data
-     */
-    public function providerStrriposException()
-    {
-        return array(
-            array('abcdefabcdef', 'a', 20),
-            array('abcdefabcdef', 'a', -20),
-            array('abcdefabcdef', 'e', 20),
-            array('abcdefabcdef', 'e', -20),
-            array('abcdefabcdef', 'z', 20),
-            array('abcdefabcdef', 'z', -20),
-            array('abcdefabcdef', ord('a'), 20),
-            array('abcdefabcdef', ord('e'), 20),
-            array('abcdefabcdef', ord('z'), 20),
-            array(3, 0, 2),
-            array(3, 3, 2),
-            array(3, '3', 2),
-            array('3', '3', 2),
-        );
-    }
-
-    /**
-     * Tests for strstr
-     *
-     * @param string $haystack      String to search in
-     * @param mixed  $needle        Characters to search
-     * @param bool   $before_needle Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStrstr
-     */
-    public function testStrstr($haystack, $needle, $before_needle = false)
-    {
-        $native = $this->_native->strstr($haystack, $needle, $before_needle);
-        $multibytes = $this->_mb->strstr($haystack, $needle, $before_needle);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native strstr: ' . var_export($native, true)
-            . ' - mb strstr: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrstr
-     *
-     * @return array Test data
-     */
-    public function providerStrstr()
-    {
-        return array(
-            array('abcdefabcdef', 'a'),
-            array('abcdefabcdef', 'a', true),
-            array('abcdefabcdef', 'A'),
-            array('abcdefabcdef', 'A', true),
-            array('abcdefabcdef', 97),
-            array('abcdefabcdef', 97, true),
-            array('abcdefabcdef', 65),
-            array('abcdefabcdef', 65, true),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'e', true),
-            array('abcdefabcdef', 'z'),
-            array('abcdefabcdef', 'z', true),
-            array('abcdefabcdef', null),
-            array('abcdefabcdef', null, true),
-            array('abcdefabcdef', false),
-            array('abcdefabcdef', false, true),
-            array(false, 'a'),
-            array(false, false),
-            array(true, 0),
-            array(true, 1),
-            array(true, true),
-            array(true, true, true),
-            array(3, 0),
-            array(3, 3),
-            array(3, 3, true),
-            array(123456789, 0),
-            array(123456789, 3),
-            array(123456789, 3, true),
-            array('3', '3'),
-            array('3', '3', true),
-            array('123456789', 3),
-            array('123456789', 3, true),
-            array('123456789', 49), //ASCII 49 = 1
-            array('123456789', 49, true),
-            array(null, 0),
-            array(null, null),
-            array('', 0),
-            array('', false),
-            array('', null),
-        );
-    }
-
-    /**
-     * Tests for strstr
-     *
-     * @param string $haystack      String to search in
-     * @param mixed  $needle        Characters to search
-     * @param bool   $before_needle Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStrstrException
-     */
-    public function testStrstrException($haystack, $needle, $before_needle = false)
-    {
-        $native = null;
-        $multibytes = null;
-        $nativeException = false;
-        $multibytesException = false;
-        try {
-            $native = $this->_native->strstr($haystack, $needle, $before_needle);
-        } catch (PHPUnit_Framework_Error $e) {
-            $nativeException = true;
-        }
-        try {
-            $multibytes = $this->_mb->strstr($haystack, $needle, $before_needle);
-        } catch (PHPUnit_Framework_Error $e) {
-            $multibytesException = true;
-        }
-
-        $this->assertTrue(
-            true === $nativeException && true === $multibytesException,
-            'native strstr: ' . var_export($native, true)
-            . ' - mb strstr: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrstrException
-     *
-     * @return array Test data
-     */
-    public function providerStrstrException()
-    {
-        return array(
-            array('abcdefabcdef', ''),
-            array('abcdefabcdef', '', true),
-        );
-    }
-
-    /**
-     * Tests for stristr
-     *
-     * @param string $haystack      String to search in
-     * @param mixed  $needle        Characters to search
-     * @param bool   $before_needle Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStristr
-     */
-    public function testStristr($haystack, $needle, $before_needle = false)
-    {
-        $this->markTestSkipped('Skip until hhvm implements third parameter.');
-        $native = $this->_native->stristr($haystack, $needle, $before_needle);
-        $multibytes = $this->_mb->stristr($haystack, $needle, $before_needle);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native stristr: ' . var_export($native, true)
-            . ' - mb stristr: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStristr
-     *
-     * @return array Test data
-     */
-    public function providerStristr()
-    {
-        return array(
-            array('abcdefabcdef', 'a'),
-            array('abcdefabcdef', 'a', true),
-            array('abcdefabcdef', 'A'),
-            array('abcdefabcdef', 'A', true),
-            array('abcdefabcdef', 97),
-            array('abcdefabcdef', 97, true),
-            array('abcdefabcdef', 65),
-            array('abcdefabcdef', 65, true),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'e', true),
-            array('abcdefabcdef', 'z'),
-            array('abcdefabcdef', 'z', true),
-            array('abcdefabcdef', null),
-            array('abcdefabcdef', null, true),
-            array('abcdefabcdef', false),
-            array('abcdefabcdef', false, true),
-            array(false, 'a'),
-            array(false, false),
-            array(true, 0),
-            array(true, 1),
-            array(true, true),
-            array(true, true, true),
-            array(3, 0),
-            array(3, 3),
-            array(3, 3, true),
-            array(123456789, 0),
-            array(123456789, 3),
-            array(123456789, 3, true),
-            array('3', '3'),
-            array('3', '3', true),
-            array('123456789', 3),
-            array('123456789', 3, true),
-            array('123456789', 49), //ASCII 49 = 1
-            array('123456789', 49, true),
-            array(null, 0),
-            array(null, null),
-            array('', 0),
-            array('', false),
-            array('', null),
-        );
-    }
-
-    /**
-     * Tests for stristr
-     *
-     * @param string $haystack      String to search in
-     * @param mixed  $needle        Characters to search
-     * @param bool   $before_needle Start position
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStristrException
-     */
-    public function testStristrException($haystack, $needle, $before_needle = false)
-    {
-        $this->markTestSkipped('Skip until hhvm implements third parameter.');
-        $native = null;
-        $multibytes = null;
-        $nativeException = false;
-        $multibytesException = false;
-        try {
-            $native = $this->_native->stristr($haystack, $needle, $before_needle);
-        } catch (PHPUnit_Framework_Error $e) {
-            $nativeException = true;
-        }
-        try {
-            $multibytes = $this->_mb->stristr($haystack, $needle, $before_needle);
-        } catch (PHPUnit_Framework_Error $e) {
-            $multibytesException = true;
-        }
-
-        $this->assertTrue(
-            true === $nativeException && true === $multibytesException,
-            'native stristr: ' . var_export($native, true)
-            . ' - mb stristr: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStristrException
-     *
-     * @return array Test data
-     */
-    public function providerStristrException()
-    {
-        return array(
-            array('abcdefabcdef', ''),
-            array('abcdefabcdef', '', true),
-        );
-    }
-
-    /**
-     * Tests for strrchr
-     *
-     * @param string $haystack String to search in
-     * @param mixed  $needle   Characters to search
-     *
-     * @return void
-     * @test
-     * @dataProvider providerStrstr
-     */
-    public function testStrrchr($haystack, $needle)
-    {
-        $native = $this->_native->strrchr($haystack, $needle);
-        $multibytes = $this->_mb->strrchr($haystack, $needle);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native strrchr: ' . var_export($native, true)
-            . ' - mb strrchr: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrrchr
-     *
-     * @return array Test data
-     */
-    public function providerStrrchr()
-    {
-        return array(
-            array('abcdefabcdef', 'a'),
-            array('abcdefabcdef', 'A'),
-            array('abcdefabcdef', 97),
-            array('abcdefabcdef', 65),
-            array('abcdefabcdef', 'e'),
-            array('abcdefabcdef', 'z'),
-            array('abcdefabcdef', ''),
-            array('abcdefabcdef', null),
-            array('abcdefabcdef', false),
-            array(false, 'a'),
-            array(false, false),
-            array(true, 0),
-            array(true, 1),
-            array(true, true),
-            array(3, 0),
-            array(3, 3),
-            array(123456789, 0),
-            array(123456789, 3),
-            array('3', '3'),
-            array('123456789', 3),
-            array('123456789', 49), //ASCII 49 = 1
-            array(null, 0),
-            array(null, null),
-            array('', 0),
-            array('', false),
-            array('', null),
-        );
-    }
-
-    /**
-     * Tests for strtolower
-     *
-     * @param string $str Input string
-     *
-     * @return void
-     * @test
-     * @dataProvider providerCase
-     */
-    public function testStrtolower($str)
-    {
-        $native = $this->_native->strtolower($str);
-        $multibytes = $this->_mb->strtolower($str);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native strtolower: ' . var_export($native, true)
-            . ' - mb strtolower: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Tests for strtoupper
-     *
-     * @param string $str Input string
-     *
-     * @return void
-     * @test
-     * @dataProvider providerCase
-     */
-    public function testStrtoupper($str)
-    {
-        $native = $this->_native->strtoupper($str);
-        $multibytes = $this->_mb->strtoupper($str);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native strtoupper: ' . var_export($native, true)
-            . ' - mb strtoupper: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testStrtolower and testStrtoupper
-     *
-     * @return array Test data
-     */
-    public function providerCase()
-    {
-        return array(
-            array('abcdefabcdef'),
-            array('abcdefABCDEF'),
-            //array('abcdefABCDEFàéÀÉ'), //Error with those characters.
-            array('abcdefABCDEF@+12345'),
-            array(false),
-            array(true),
-            array(3),
-            array(123456789),
-            array('3'),
-            array('4k'),
-            array('4kb'),
-            array('4K'),
-            array('4KB'),
-            array('123456789'),
-            array(null),
-            array(''),
-        );
-    }
-
-    /**
-     * Tests for ord
-     *
-     * @param string $chr Input char
-     *
-     * @return void
-     * @test
-     * @dataProvider providerOrd
-     */
-    public function testOrd($chr)
-    {
-        $native = $this->_native->ord($chr);
-        $multibytes = $this->_mb->ord($chr);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native ord: ' . var_export($native, true)
-            . ' - mb ord: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testOrd
-     *
-     * @return array Test data
-     */
-    public function providerOrd()
-    {
-        return array(
-            array('a'),
-            array('A'),
-            array('az'),
-            array('AZ'),
-            array('3a'),
-            array(3),
-            array(3.1),
-            array(true),
-            array(false),
-            array(null),
-            array(''),
-        );
-    }
-
-    /**
-     * Tests for chr
-     *
-     * @param string $ascii Ascii code
-     *
-     * @return void
-     * @test
-     * @dataProvider providerChr
-     */
-    public function testChr($ascii)
-    {
-        $native = $this->_native->chr($ascii);
-        $multibytes = $this->_mb->chr($ascii);
-        $this->assertTrue(
-            $native === $multibytes,
-            'native chr: ' . var_export($native, true)
-            . ' - mb chr: ' . var_export($multibytes, true)
-        );
-    }
-
-    /**
-     * Data provider for testChr
-     *
-     * @return array Test data
-     */
-    public function providerChr()
-    {
-        return array(
-            array('a'),
-            array('A'),
-            array('az'),
-            array('AZ'),
-            array('a3'),
-            array(3),
-            array(3.1),
-            array(false),
-            array(true),
-            array(null),
-            array(''),
-        );
-    }
-}