Show more used PHP extensions

This helps user to see what features are available.

Issue #11874

Signed-off-by: Michal Čihař <michal@cihar.com>

ChangeLog

@@ -34,6 +34,7 @@ phpMyAdmin - ChangeLog
 + issue #11796 Use modals for displaying forms in db structure page
 + issue #11789 Show MySQL error messages in user language
 + issue        Add 'ssl_verify' configuration directive for self-signed certificates with mysqlnd and PHP >= 5.6
++ issue #11874 Show more used PHP extensions
 
 4.5.5.0 (not yet released)
 - issue        Undefined index: is_ajax_request

index.php

@@ -335,13 +335,13 @@ if ($GLOBALS['cfg']['ShowServerInfo'] || $GLOBALS['cfg']['ShowPhpInfo']) {
             );
 
             $php_ext_string = __('PHP extension:') . ' ';
-            if (PMA\libraries\DatabaseInterface::checkDbExtension('mysqli')) {
-                $extension = 'mysqli';
-            } else {
-                $extension = 'mysql';
+
+            $extensions = PMA\libraries\Util::listPHPExtensions();
+
+            foreach ($extensions as $extension) {
+                $php_ext_string  .= '  ' . $extension
+                    . PMA\libraries\Util::showPHPDocu('book.' . $extension . '.php');
             }
-            $php_ext_string  .= $extension . ' '
-                . PMA\libraries\Util::showPHPDocu('book.' . $extension . '.php');
 
             PMA_printListItem(
                 $php_ext_string,

libraries/Util.php

@@ -4957,5 +4957,30 @@ class Util
         }
         return $tables;
     }
+
+    /**
+     * Returs list of used PHP extensions.
+     *
+     * @return array of strings
+     */
+    public static function listPHPExtensions()
+    {
+        $result = array();
+        if (DatabaseInterface::checkDbExtension('mysqli')) {
+            $result[] = 'mysqli';
+        } else {
+            $result[] = 'mysql';
+        }
+
+        if (extension_loaded('curl')) {
+            $result[] = 'curl';
+        }
+
+        if (extension_loaded('mbstring')) {
+            $result[] = 'mbstring';
+        }
+
+        return $result;
+    }
 }