diff --git a/browse_foreigners.php b/browse_foreigners.php
index c8867af3f0..16fa48c822 100644
--- a/browse_foreigners.php
+++ b/browse_foreigners.php
@@ -27,7 +27,7 @@ $foreigners  = ($cfgRelation['relwork'] ? PMA_getForeigners($db, $table) : FALSE
 
 $override_total = TRUE;
 
-if (!isset($pos)) {
+if (! isset($pos)) {
     $pos = 0;
 }
 
diff --git a/db_datadict.php b/db_datadict.php
index e67c096c3e..e9d18fdf1e 100644
--- a/db_datadict.php
+++ b/db_datadict.php
@@ -10,7 +10,7 @@
  */
 require_once './libraries/common.inc.php';
 
-if (!isset($selected_tbl)) {
+if (! isset($selected_tbl)) {
     require_once './libraries/header.inc.php';
 }
 
@@ -220,7 +220,7 @@ while ($row = PMA_DBI_fetch_assoc($rowset)) {
         if ($zerofill) {
             $attribute = 'UNSIGNED ZEROFILL';
         }
-        if (!isset($row['Default'])) {
+        if (! isset($row['Default'])) {
             if ($row['Null'] != 'NO') {
                 $row['Default'] = '<i>NULL</i>';
             }
diff --git a/db_operations.php b/db_operations.php
index f48ba27678..c3be3527fd 100644
--- a/db_operations.php
+++ b/db_operations.php
@@ -37,7 +37,7 @@ if (strlen($db) && (! empty($db_rename) || ! empty($db_copy))) {
         $move = false;
     }
 
-    if (!isset($newname) || !strlen($newname)) {
+    if (! isset($newname) || !strlen($newname)) {
         $message = PMA_Message::error(__('The database name is empty!'));
     } else {
         $sql_query = ''; // in case target db exists
diff --git a/db_printview.php b/db_printview.php
index 36f297c994..7e3c709935 100644
--- a/db_printview.php
+++ b/db_printview.php
@@ -52,7 +52,7 @@ if ($cfg['SkipLockedTables'] == true) {
             $result      = PMA_DBI_query('SHOW TABLES FROM ' . PMA_backquote($db) . ';', null, PMA_DBI_QUERY_STORE);
             if ($result != false && PMA_DBI_num_rows($result) > 0) {
                 while ($tmp = PMA_DBI_fetch_row($result)) {
-                    if (!isset($sot_cache[$tmp[0]])) {
+                    if (! isset($sot_cache[$tmp[0]])) {
                         $sts_result  = PMA_DBI_query('SHOW TABLE STATUS FROM ' . PMA_backquote($db) . ' LIKE \'' . addslashes($tmp[0]) . '\';');
                         $sts_tmp     = PMA_DBI_fetch_assoc($sts_result);
                         $tables[]    = $sts_tmp;
diff --git a/db_qbe.php b/db_qbe.php
index 751317d111..34c85eed3f 100644
--- a/db_qbe.php
+++ b/db_qbe.php
@@ -339,7 +339,7 @@ for ($x = 0; $x < $col; $x++) {
     if (isset($criteria[$x])) {
         $tmp_criteria = $criteria[$x];
     }
-    if ((empty($prev_criteria) || !isset($prev_criteria[$x]))
+    if ((empty($prev_criteria) || ! isset($prev_criteria[$x]))
         || $prev_criteria[$x] != htmlspecialchars($tmp_criteria)) {
         $curCriteria[$z]   = $tmp_criteria;
     } else {
@@ -497,7 +497,7 @@ for ($y = 0; $y <= $row; $y++) {
 
         echo "\n";
         $or = 'Or' . $y;
-        if (!isset(${$or})) {
+        if (! isset(${$or})) {
             ${$or} = '';
         }
         if (!empty(${$or}) && isset(${$or}[$x])) {
@@ -667,7 +667,7 @@ foreach ($tbl_names as $key => $val) {
 <?php
 // 1. SELECT
 $last_select = 0;
-if (!isset($qry_select)) {
+if (! isset($qry_select)) {
     $qry_select         = '';
 }
 for ($x = 0; $x < $col; $x++) {
@@ -892,7 +892,7 @@ if ($criteria_cnt > 1) {
     $qry_where      = '(' . $qry_where . ')';
 }
 // OR rows ${'cur' . $or}[$x]
-if (!isset($curAndOrRow)) {
+if (! isset($curAndOrRow)) {
     $curAndOrRow          = array();
 }
 for ($y = 0; $y <= $row; $y++) {
@@ -929,7 +929,7 @@ if (!empty($qry_where) && $qry_where != '()') {
 
 // 4. ORDER BY
 $last_orderby = 0;
-if (!isset($qry_orderby)) {
+if (! isset($qry_orderby)) {
     $qry_orderby      = '';
 }
 for ($x = 0; $x < $col; $x++) {
diff --git a/export.php b/export.php
index 7da25fc051..22a6324261 100644
--- a/export.php
+++ b/export.php
@@ -21,7 +21,7 @@ $export_list = PMA_getPlugins('./libraries/export/', array('export_type' => $exp
 $type = $what;
 
 // Check export type
-if (!isset($export_list[$type])) {
+if (! isset($export_list[$type])) {
     die('Bad type!');
 }
 
@@ -451,7 +451,7 @@ if ($export_type == 'server') {
     // Walk over databases
     foreach ($GLOBALS['pma']->databases as $current_db) {
         if ((isset($tmp_select) && strpos(' ' . $tmp_select, '|' . $current_db . '|'))
-            || !isset($tmp_select)) {
+            || ! isset($tmp_select)) {
             if (!PMA_exportDBHeader($current_db)) {
                 break 2;
             }
diff --git a/import.php b/import.php
index 78e5ffdb4a..0b029e5c2f 100644
--- a/import.php
+++ b/import.php
@@ -332,7 +332,7 @@ if ($import_file != 'none' && !$error) {
         $error = TRUE;
     }
 } elseif (!$error) {
-    if (!isset($import_text) || empty($import_text)) {
+    if (! isset($import_text) || empty($import_text)) {
         $message = PMA_Message::error(__('No data was received to import. Either no file name was submitted, or the file size exceeded the maximum size permitted by your PHP configuration. See [a@./Documentation.html#faq1_16@Documentation]FAQ 1.16[/a].'));
         $error = TRUE;
     }
diff --git a/libraries/Config.class.php b/libraries/Config.class.php
index 4c2f281bb0..f71a4e91fa 100644
--- a/libraries/Config.class.php
+++ b/libraries/Config.class.php
@@ -148,7 +148,7 @@ class PMA_Config
     {
         if (PMA_getenv('HTTP_USER_AGENT')) {
             $HTTP_USER_AGENT = PMA_getenv('HTTP_USER_AGENT');
-        } elseif (!isset($HTTP_USER_AGENT)) {
+        } elseif (! isset($HTTP_USER_AGENT)) {
             $HTTP_USER_AGENT = '';
         }
 
@@ -441,7 +441,7 @@ class PMA_Config
         if ($server > 0 && !defined('PMA_MINIMUM_COMMON')) {
             $config_mtime = max($this->default_source_mtime, $this->source_mtime);
             // cache user preferences, use database only when needed
-            if (!isset($_SESSION['cache'][$cache_key]['userprefs'])
+            if (! isset($_SESSION['cache'][$cache_key]['userprefs'])
                     || $_SESSION['cache'][$cache_key]['config_mtime'] < $config_mtime) {
                 // load required libraries
                 require_once './libraries/user_preferences.lib.php';
@@ -451,7 +451,7 @@ class PMA_Config
                 $_SESSION['cache'][$cache_key]['userprefs_type'] = $prefs['type'];
                 $_SESSION['cache'][$cache_key]['config_mtime'] = $config_mtime;
             }
-        } else if ($server == 0 || !isset($_SESSION['cache'][$cache_key]['userprefs'])) {
+        } else if ($server == 0 || ! isset($_SESSION['cache'][$cache_key]['userprefs'])) {
             $this->set('user_preferences', false);
             return;
         }
@@ -476,7 +476,7 @@ class PMA_Config
         // save theme
         $tmanager = $_SESSION['PMA_Theme_Manager'];
         if ($tmanager->getThemeCookie() || isset($_REQUEST['set_theme'])) {
-            if ((!isset($config_data['ThemeDefault']) && $tmanager->theme->getId() != 'original')
+            if ((! isset($config_data['ThemeDefault']) && $tmanager->theme->getId() != 'original')
                     || isset($config_data['ThemeDefault']) && $config_data['ThemeDefault'] != $tmanager->theme->getId()) {
                 // new theme was set in common.inc.php
                 $this->setUserValue(null, 'ThemeDefault', $tmanager->theme->getId(), 'original');
@@ -491,14 +491,14 @@ class PMA_Config
         }
 
         // save font size
-        if ((!isset($config_data['fontsize']) && $org_fontsize != '82%')
+        if ((! isset($config_data['fontsize']) && $org_fontsize != '82%')
                 || isset($config_data['fontsize']) && $org_fontsize != $config_data['fontsize']) {
             $this->setUserValue(null, 'fontsize', $org_fontsize, '82%');
         }
 
         // save language
         if (isset($_COOKIE['pma_lang']) || isset($_POST['lang'])) {
-            if ((!isset($config_data['lang']) && $GLOBALS['lang'] != 'en')
+            if ((! isset($config_data['lang']) && $GLOBALS['lang'] != 'en')
                     || isset($config_data['lang']) && $GLOBALS['lang'] != $config_data['lang']) {
                 $this->setUserValue(null, 'lang', $GLOBALS['lang'], 'en');
             }
@@ -511,7 +511,7 @@ class PMA_Config
 
         // save connection collation
         if (isset($_COOKIE['pma_collation_connection']) || isset($_POST['collation_connection'])) {
-            if ((!isset($config_data['collation_connection']) && $GLOBALS['collation_connection'] != 'utf8_general_ci')
+            if ((! isset($config_data['collation_connection']) && $GLOBALS['collation_connection'] != 'utf8_general_ci')
                     || isset($config_data['collation_connection']) && $GLOBALS['collation_connection'] != $config_data['collation_connection']) {
                 $this->setUserValue(null, 'collation_connection', $GLOBALS['collation_connection'], 'utf8_general_ci');
             }
@@ -678,7 +678,7 @@ class PMA_Config
      */
     function set($setting, $value)
     {
-        if (!isset($this->settings[$setting]) || $this->settings[$setting] != $value) {
+        if (! isset($this->settings[$setting]) || $this->settings[$setting] != $value) {
             $this->settings[$setting] = $value;
             $this->set_mtime = time();
         }
diff --git a/libraries/List_Database.class.php b/libraries/List_Database.class.php
index c29cc9dce4..2663673a4f 100644
--- a/libraries/List_Database.class.php
+++ b/libraries/List_Database.class.php
@@ -498,7 +498,7 @@ require_once './libraries/List.class.php';
                     if (isset($tmp_mydbs[$tmp_db]) && $tmp_mydbs[$tmp_db] == 1) {
                         $dblist[]           = $tmp_db;
                         $tmp_mydbs[$tmp_db] = 0;
-                    } elseif (!isset($dblist[$tmp_db])) {
+                    } elseif (! isset($dblist[$tmp_db])) {
                         foreach ($tmp_mydbs as $tmp_matchpattern => $tmp_value) {
                             // fixed bad regexp
                             // TODO: db names may contain characters
diff --git a/libraries/Table.class.php b/libraries/Table.class.php
index a29900e7b5..d41eadc8d9 100644
--- a/libraries/Table.class.php
+++ b/libraries/Table.class.php
@@ -889,7 +889,7 @@ class PMA_Table
         } else {
             // we are copying
             // Create new entries as duplicates from old PMA DBs
-            if ($what != 'dataonly' && !isset($maintain_relations)) {
+            if ($what != 'dataonly' && ! isset($maintain_relations)) {
                 if ($GLOBALS['cfgRelation']['commwork']) {
                     // Get all comments and MIME-Types for current table
                     $comments_copy_query = 'SELECT
diff --git a/libraries/chart.lib.php b/libraries/chart.lib.php
index 3911f2e95b..83791fb425 100644
--- a/libraries/chart.lib.php
+++ b/libraries/chart.lib.php
@@ -104,7 +104,7 @@ function PMA_chart_results($data, &$chartSettings)
     // default for muti series
     $chartSettings['multi'] = false;
 
-    if (!isset($data[0])) {
+    if (! isset($data[0])) {
         // empty data
         return __('No data found for the chart.');
     }
@@ -192,7 +192,7 @@ function PMA_chart_results($data, &$chartSettings)
                     // the value os for this serie
                     $chartData[$yAxisKey][$seriesLabelsValue][$row[$xAxisKey]] = (int)$row[$yAxisKey];
                 }
-                else if (!isset($chartData[$yAxisKey][$seriesLabelsValue][$row[$xAxisKey]])) {
+                else if (! isset($chartData[$yAxisKey][$seriesLabelsValue][$row[$xAxisKey]])) {
                     // if the value for this serie is not set, set it to 0
                     $chartData[$yAxisKey][$seriesLabelsValue][$row[$xAxisKey]] = 0;
                 }
diff --git a/libraries/common.inc.php b/libraries/common.inc.php
index 49937c8ed6..ef6f64b6c9 100644
--- a/libraries/common.inc.php
+++ b/libraries/common.inc.php
@@ -608,7 +608,7 @@ $GLOBALS['server'] = 0;
  * @todo merge into PMA_Config
  */
 // Do we have some server?
-if (!isset($cfg['Servers']) || count($cfg['Servers']) == 0) {
+if (! isset($cfg['Servers']) || count($cfg['Servers']) == 0) {
     // No server => create one with defaults
     $cfg['Servers'] = array(1 => $default_server);
 } else {
@@ -664,7 +664,7 @@ if (! isset($_SESSION['PMA_Theme_Manager'])) {
 }
 
 // for the theme per server feature
-if (isset($_REQUEST['server']) && !isset($_REQUEST['set_theme'])) {
+if (isset($_REQUEST['server']) && ! isset($_REQUEST['set_theme'])) {
     $GLOBALS['server'] = $_REQUEST['server'];
     $tmp = $_SESSION['PMA_Theme_Manager']->getThemeCookie();
     if (empty($tmp)) {
diff --git a/libraries/common.lib.php b/libraries/common.lib.php
index 5b353ec6fa..6972514fef 100644
--- a/libraries/common.lib.php
+++ b/libraries/common.lib.php
@@ -781,12 +781,12 @@ function PMA_getTableList($db, $tables = null, $limit_offset = 0, $limit_count =
                 $group_name = $parts[$i] . $sep;
                 $group_name_full .= $group_name;
 
-                if (!isset($group[$group_name])) {
+                if (! isset($group[$group_name])) {
                     $group[$group_name] = array();
                     $group[$group_name]['is' . $sep . 'group'] = true;
                     $group[$group_name]['tab' . $sep . 'count'] = 1;
                     $group[$group_name]['tab' . $sep . 'group'] = $group_name_full;
-                } elseif (!isset($group[$group_name]['is' . $sep . 'group'])) {
+                } elseif (! isset($group[$group_name]['is' . $sep . 'group'])) {
                     $table = $group[$group_name];
                     $group[$group_name] = array();
                     $group[$group_name][$group_name] = $table;
@@ -801,7 +801,7 @@ function PMA_getTableList($db, $tables = null, $limit_offset = 0, $limit_count =
                 $i++;
             }
         } else {
-            if (!isset($table_groups[$table_name])) {
+            if (! isset($table_groups[$table_name])) {
                 $table_groups[$table_name] = array();
             }
             $group =& $table_groups;
@@ -963,7 +963,7 @@ function PMA_showMessage($message, $sql_query = null, $type = 'notice', $is_view
      * in a string.  In some special cases on sql.php, buffering has to be disabled
      * and hence we check with $GLOBALS['buffer_message']
      */
-    if( $GLOBALS['is_ajax_request'] == true && !isset($GLOBALS['buffer_message']) ) {
+    if( $GLOBALS['is_ajax_request'] == true && ! isset($GLOBALS['buffer_message']) ) {
         ob_start();
     }
     global $cfg;
@@ -1280,7 +1280,7 @@ function PMA_showMessage($message, $sql_query = null, $type = 'notice', $is_view
     // If we are in an Ajax request, we have most probably been called in
     // PMA_ajaxResponse().  Hence, collect the buffer contents and return it
     // to PMA_ajaxResponse(), which will encode it for JSON.
-    if( $GLOBALS['is_ajax_request'] == true && !isset($GLOBALS['buffer_message']) ) {
+    if( $GLOBALS['is_ajax_request'] == true && ! isset($GLOBALS['buffer_message']) ) {
         $buffer_contents =  ob_get_contents();
         ob_end_clean();
         return $buffer_contents;
@@ -2001,7 +2001,7 @@ function PMA_checkParameters($params, $die = true, $request = true)
 {
     global $checked_special;
 
-    if (!isset($checked_special)) {
+    if (! isset($checked_special)) {
         $checked_special = false;
     }
 
@@ -2014,7 +2014,7 @@ function PMA_checkParameters($params, $die = true, $request = true)
             $checked_special = true;
         }
 
-        if (!isset($GLOBALS[$param])) {
+        if (! isset($GLOBALS[$param])) {
             $error_message .= $reported_script_name
                 . ': Missing parameter: ' . $param
                 . PMA_showDocu('faqmissingparameters')
@@ -2112,7 +2112,7 @@ function PMA_getUniqueCondition($handle, $fields_cnt, $fields_meta, $row, $force
                 . PMA_backquote($meta->orgname) . ' ';
         } // end if... else...
 
-        if (!isset($row[$i]) || is_null($row[$i])) {
+        if (! isset($row[$i]) || is_null($row[$i])) {
             $condition .= 'IS NULL AND';
         } else {
             // timestamp is numeric on some MySQL 4.1
diff --git a/libraries/core.lib.php b/libraries/core.lib.php
index 76d2c86126..505640b215 100644
--- a/libraries/core.lib.php
+++ b/libraries/core.lib.php
@@ -603,7 +603,7 @@ function PMA_array_read($path, $array, $default = null)
     $keys = explode('/', $path);
     $value =& $array;
     foreach ($keys as $key) {
-        if (!isset($value[$key])) {
+        if (! isset($value[$key])) {
             return $default;
         }
         $value =& $value[$key];
@@ -624,7 +624,7 @@ function PMA_array_write($path, &$array, $value)
     $last_key = array_pop($keys);
     $a =& $array;
     foreach ($keys as $key) {
-        if (!isset($a[$key])) {
+        if (! isset($a[$key])) {
             $a[$key] = array();
         }
         $a =& $a[$key];
@@ -650,7 +650,7 @@ function PMA_array_remove($path, &$array)
     $found = true;
     // go as deep as required or possible
     foreach ($keys as $key) {
-        if (!isset($path[$depth][$key])) {
+        if (! isset($path[$depth][$key])) {
             $found = false;
             break;
         }
@@ -665,7 +665,7 @@ function PMA_array_remove($path, &$array)
 
     // remove empty nested arrays
     for (; $depth >= 0; $depth--) {
-        if (!isset($path[$depth+1]) || count($path[$depth+1]) == 0) {
+        if (! isset($path[$depth+1]) || count($path[$depth+1]) == 0) {
             unset($path[$depth][$keys[$depth]]);
         } else {
             break;
diff --git a/libraries/database_interface.lib.php b/libraries/database_interface.lib.php
index 22d9671e97..be8d9f5f89 100644
--- a/libraries/database_interface.lib.php
+++ b/libraries/database_interface.lib.php
@@ -196,7 +196,7 @@ function PMA_usort_comparison_callback($a, $b)
         $sorter = 'strcasecmp';
     }
     /* No sorting when key is not present */
-    if (!isset($a[$GLOBALS['callback_sort_by']]) || ! isset($b[$GLOBALS['callback_sort_by']])) {
+    if (! isset($a[$GLOBALS['callback_sort_by']]) || ! isset($b[$GLOBALS['callback_sort_by']])) {
         return 0;
     }
     // produces f.e.:
diff --git a/libraries/db_info.inc.php b/libraries/db_info.inc.php
index d8610f29a5..f8bb5a00a0 100644
--- a/libraries/db_info.inc.php
+++ b/libraries/db_info.inc.php
@@ -152,7 +152,7 @@ if (true === $cfg['SkipLockedTables']) {
                 null, PMA_DBI_QUERY_STORE);
             if ($db_info_result && PMA_DBI_num_rows($db_info_result) > 0) {
                 while ($tmp = PMA_DBI_fetch_row($db_info_result)) {
-                    if (!isset($sot_cache[$tmp[0]])) {
+                    if (! isset($sot_cache[$tmp[0]])) {
                         $sts_result  = PMA_DBI_query(
                             'SHOW TABLE STATUS FROM ' . PMA_backquote($db)
                              . ' LIKE \'' . addslashes($tmp[0]) . '\';');
@@ -160,7 +160,7 @@ if (true === $cfg['SkipLockedTables']) {
                         PMA_DBI_free_result($sts_result);
                         unset($sts_result);
 
-                        if (!isset($sts_tmp['Type']) && isset($sts_tmp['Engine'])) {
+                        if (! isset($sts_tmp['Type']) && isset($sts_tmp['Engine'])) {
                             $sts_tmp['Type'] =& $sts_tmp['Engine'];
                         }
 
diff --git a/libraries/display_export.lib.php b/libraries/display_export.lib.php
index 10e8178d27..88c80af181 100644
--- a/libraries/display_export.lib.php
+++ b/libraries/display_export.lib.php
@@ -65,7 +65,7 @@ echo '<input type="hidden" name="export_type" value="' . $export_type . '" />' .
 // If the export method was not set, the default is quick
 if(isset($_GET['export_method'])) {
     $cfg['Export']['method'] = $_GET['export_method'];
-} elseif(!isset($cfg['Export']['method'])) {
+} elseif(! isset($cfg['Export']['method'])) {
     $cfg['Export']['method'] = 'quick';
 }
 // The export method (quick, custom or custom-no-form)
diff --git a/libraries/display_tbl.lib.php b/libraries/display_tbl.lib.php
index 78b4bb6850..8dc420c414 100644
--- a/libraries/display_tbl.lib.php
+++ b/libraries/display_tbl.lib.php
@@ -1272,7 +1272,7 @@ function PMA_displayTableBody(&$dt_result, &$is_display, $map, $analyzed_sql) {
                 $condition_field = false;
             }
 
-            if ($_SESSION['tmp_user_values']['disp_direction'] == 'vertical' && (!isset($GLOBALS['printview']) || ($GLOBALS['printview'] != '1'))) {
+            if ($_SESSION['tmp_user_values']['disp_direction'] == 'vertical' && (! isset($GLOBALS['printview']) || ($GLOBALS['printview'] != '1'))) {
                 // the row number corresponds to a data row, not HTML table row
                 $class .= ' row_' . $row_no;
                 if ($GLOBALS['cfg']['BrowsePointerEnable'] == true) {
@@ -1328,7 +1328,7 @@ function PMA_displayTableBody(&$dt_result, &$is_display, $map, $analyzed_sql) {
                 //       will show both fields NULL even if only one is NULL,
                 //       so use the $pointer
 
-                if (!isset($row[$i]) || is_null($row[$i])) {
+                if (! isset($row[$i]) || is_null($row[$i])) {
                     $vertical_display['data'][$row_no][$i]     =  PMA_buildNullDisplay($class, $condition_field);
                 } elseif ($row[$i] != '') {
 
@@ -1351,7 +1351,7 @@ function PMA_displayTableBody(&$dt_result, &$is_display, $map, $analyzed_sql) {
                 $class = str_replace('inline_edit', '', $class);
 
                 if (stristr($field_flags, 'BINARY')) {
-                    if (!isset($row[$i]) || is_null($row[$i])) {
+                    if (! isset($row[$i]) || is_null($row[$i])) {
                         $vertical_display['data'][$row_no][$i]     =  PMA_buildNullDisplay($class, $condition_field);
                     } else {
                         // for blobstreaming
@@ -1367,7 +1367,7 @@ function PMA_displayTableBody(&$dt_result, &$is_display, $map, $analyzed_sql) {
                     }
                 // not binary:
                 } else {
-                    if (!isset($row[$i]) || is_null($row[$i])) {
+                    if (! isset($row[$i]) || is_null($row[$i])) {
                         $vertical_display['data'][$row_no][$i]     =  PMA_buildNullDisplay($class, $condition_field);
                     } elseif ($row[$i] != '') {
                         // if a transform function for blob is set, none of these replacements will be made
@@ -1395,7 +1395,7 @@ function PMA_displayTableBody(&$dt_result, &$is_display, $map, $analyzed_sql) {
 
             // n o t   n u m e r i c   a n d   n o t   B L O B
             } else {
-                if (!isset($row[$i]) || is_null($row[$i])) {
+                if (! isset($row[$i]) || is_null($row[$i])) {
                     $vertical_display['data'][$row_no][$i]     =  PMA_buildNullDisplay($class, $condition_field);
                 } elseif ($row[$i] != '') {
                     // support blanks in the key
@@ -1477,7 +1477,7 @@ function PMA_displayTableBody(&$dt_result, &$is_display, $map, $analyzed_sql) {
 
         // 4. Gather links of del_urls and edit_urls in an array for later
         //    output
-        if (!isset($vertical_display['edit'][$row_no])) {
+        if (! isset($vertical_display['edit'][$row_no])) {
             $vertical_display['edit'][$row_no]       = '';
             $vertical_display['copy'][$row_no]       = '';
             $vertical_display['delete'][$row_no]     = '';
@@ -2070,7 +2070,7 @@ function PMA_displayTable(&$dt_result, &$the_disp_mode, $analyzed_sql)
 
         PMA_showMessage($message, $sql_query, 'success');
 
-    } elseif (!isset($GLOBALS['printview']) || $GLOBALS['printview'] != '1') {
+    } elseif (! isset($GLOBALS['printview']) || $GLOBALS['printview'] != '1') {
         PMA_showMessage(__('Your SQL query has been executed successfully'), $sql_query, 'success');
     }
 
@@ -2090,7 +2090,7 @@ function PMA_displayTable(&$dt_result, &$the_disp_mode, $analyzed_sql)
     if ($is_display['nav_bar'] == '1') {
         PMA_displayTableNavigation($pos_next, $pos_prev, $sql_query, 'top_direction_dropdown');
         echo "\n";
-    } elseif (!isset($GLOBALS['printview']) || $GLOBALS['printview'] != '1') {
+    } elseif (! isset($GLOBALS['printview']) || $GLOBALS['printview'] != '1') {
         echo "\n" . '<br /><br />' . "\n";
     }
 
@@ -2212,12 +2212,12 @@ function PMA_displayTable(&$dt_result, &$the_disp_mode, $analyzed_sql)
     if ($is_display['nav_bar'] == '1') {
         echo '<br />' . "\n";
         PMA_displayTableNavigation($pos_next, $pos_prev, $sql_query, 'bottom_direction_dropdown');
-    } elseif (!isset($GLOBALS['printview']) || $GLOBALS['printview'] != '1') {
+    } elseif (! isset($GLOBALS['printview']) || $GLOBALS['printview'] != '1') {
         echo "\n" . '<br /><br />' . "\n";
     }
 
     // 6. ----- Displays "Query results operations"
-    if (!isset($GLOBALS['printview']) || $GLOBALS['printview'] != '1') {
+    if (! isset($GLOBALS['printview']) || $GLOBALS['printview'] != '1') {
         PMA_displayResultsOperations($the_disp_mode, $analyzed_sql);
     }
 } // end of the 'PMA_displayTable()' function
@@ -2298,8 +2298,8 @@ function PMA_displayResultsOperations($the_disp_mode, $analyzed_sql) {
     // If the parser found a PROCEDURE clause
     // (most probably PROCEDURE ANALYSE()) it makes no sense to
     // display the Export link).
-    if (isset($analyzed_sql[0]) && $analyzed_sql[0]['querytype'] == 'SELECT' && !isset($printview) && ! isset($analyzed_sql[0]['queryflags']['procedure'])) {
-        if (isset($analyzed_sql[0]['table_ref'][0]['table_true_name']) && !isset($analyzed_sql[0]['table_ref'][1]['table_true_name'])) {
+    if (isset($analyzed_sql[0]) && $analyzed_sql[0]['querytype'] == 'SELECT' && ! isset($printview) && ! isset($analyzed_sql[0]['queryflags']['procedure'])) {
+        if (isset($analyzed_sql[0]['table_ref'][0]['table_true_name']) && ! isset($analyzed_sql[0]['table_ref'][1]['table_true_name'])) {
             $_url_params['single_table'] = 'true';
         }
         if (!$header_shown) {
diff --git a/libraries/footer.inc.php b/libraries/footer.inc.php
index f5385d5156..5a66351664 100644
--- a/libraries/footer.inc.php
+++ b/libraries/footer.inc.php
@@ -166,7 +166,7 @@ if (window.parent.frame_content) {
 }
 
 // Link to itself to replicate windows including frameset
-if (!isset($GLOBALS['checked_special'])) {
+if (! isset($GLOBALS['checked_special'])) {
     $GLOBALS['checked_special'] = false;
 }
 
diff --git a/libraries/header.inc.php b/libraries/header.inc.php
index 807ec0af20..7148eac135 100644
--- a/libraries/header.inc.php
+++ b/libraries/header.inc.php
@@ -30,7 +30,7 @@ if (isset($GLOBALS['is_ajax_request']) && !$GLOBALS['is_ajax_request']) {
         // if database storage for user preferences is transient, offer to load
         // exported settings from localStorage (detection will be done in JavaScript)
         $userprefs_offer_import = $GLOBALS['PMA_Config']->get('user_preferences') == 'session'
-                && !isset($_SESSION['userprefs_autoload']);
+                && ! isset($_SESSION['userprefs_autoload']);
         if ($userprefs_offer_import) {
             $GLOBALS['js_include'][] = 'config.js';
         }
@@ -143,7 +143,7 @@ if (isset($GLOBALS['is_ajax_request']) && !$GLOBALS['is_ajax_request']) {
                          * @uses $show_comment from libraries/tbl_info.inc.php
                          * @uses $GLOBALS['avoid_show_comment'] from tbl_relation.php
                          */
-                        if (!empty($show_comment) && !isset($GLOBALS['avoid_show_comment'])) {
+                        if (!empty($show_comment) && ! isset($GLOBALS['avoid_show_comment'])) {
                             if (strstr($show_comment, '; InnoDB free')) {
                                 $show_comment = preg_replace('@; InnoDB free:.*?$@', '', $show_comment);
                             }
diff --git a/libraries/import.lib.php b/libraries/import.lib.php
index a7d0b5ef93..0c77f5419c 100644
--- a/libraries/import.lib.php
+++ b/libraries/import.lib.php
@@ -127,7 +127,7 @@ function PMA_importRunQuery($sql = '', $full = '', $controluser = false)
                         }
                         $msg = '# ';
                         if ($result === FALSE) { // execution failed
-                            if (!isset($my_die)) {
+                            if (! isset($my_die)) {
                                 $my_die = array();
                             }
                             $my_die[] = array('sql' => $import_run_buffer['full'], 'error' => PMA_DBI_getError());
@@ -697,7 +697,7 @@ function PMA_detectSize($last_cumulative_size, $last_cumulative_type, $curr_type
         /**
          * This is the first row to be analyzed
          */
-        elseif (!isset($last_cumulative_type) || $last_cumulative_type == NONE) {
+        elseif (! isset($last_cumulative_type) || $last_cumulative_type == NONE) {
             return $curr_size;
         }
         /**
diff --git a/libraries/mysql_charsets.lib.php b/libraries/mysql_charsets.lib.php
index 45fd55ac9c..e1962c6cc1 100644
--- a/libraries/mysql_charsets.lib.php
+++ b/libraries/mysql_charsets.lib.php
@@ -46,7 +46,7 @@ if (! PMA_cacheExists('mysql_charsets_count', true)) {
         if ($row['IS_DEFAULT'] == 'Yes') {
             $mysql_default_collations[$row['CHARACTER_SET_NAME']] = $row['COLLATION_NAME'];
         }
-        //$mysql_collations_available[$row['Collation']] = !isset($row['Compiled']) || $row['Compiled'] == 'Yes';
+        //$mysql_collations_available[$row['Collation']] = ! isset($row['Compiled']) || $row['Compiled'] == 'Yes';
         $mysql_collations_available[$row['COLLATION_NAME']] = true;
         $mysql_charsets_available[$row['CHARACTER_SET_NAME']] =
             !empty($mysql_charsets_available[$row['CHARACTER_SET_NAME']])
diff --git a/libraries/plugin_interface.lib.php b/libraries/plugin_interface.lib.php
index 48dc97577e..edfd02a403 100644
--- a/libraries/plugin_interface.lib.php
+++ b/libraries/plugin_interface.lib.php
@@ -71,7 +71,7 @@ function PMA_getString($name)
 function PMA_pluginCheckboxCheck($section, $opt)
 {
     // If the form is being repopulated using $_GET data, that is priority
-    if (isset($_GET[$opt]) || !isset($_GET['repopulate']) && ((isset($GLOBALS['timeout_passed']) && $GLOBALS['timeout_passed'] && isset($_REQUEST[$opt])) ||
+    if (isset($_GET[$opt]) || ! isset($_GET['repopulate']) && ((isset($GLOBALS['timeout_passed']) && $GLOBALS['timeout_passed'] && isset($_REQUEST[$opt])) ||
         (isset($GLOBALS['cfg'][$section][$opt]) && $GLOBALS['cfg'][$section][$opt]))) {
         return ' checked="checked"';
     }
@@ -160,7 +160,7 @@ function PMA_pluginIsActive($section, $opt, $val)
  */
 function PMA_pluginGetChoice($section, $name, &$list, $cfgname = NULL)
 {
-    if (!isset($cfgname)) {
+    if (! isset($cfgname)) {
         $cfgname = $name;
     }
     $ret = '<select id="plugins" name="' . $name . '">';
@@ -168,7 +168,7 @@ function PMA_pluginGetChoice($section, $name, &$list, $cfgname = NULL)
     foreach ($list as $plugin_name => $val) {
         $ret .= '<option';
          // If the form is being repopulated using $_GET data, that is priority
-        if(isset($_GET[$name]) && $plugin_name == $_GET[$name] || !isset($_GET[$name]) && $plugin_name == $default) {
+        if(isset($_GET[$name]) && $plugin_name == $_GET[$name] || ! isset($_GET[$name]) && $plugin_name == $default) {
             $ret .= ' selected="selected"';
         }
          $ret .= ' value="' . $plugin_name . '">' . PMA_getString($val['text']) . '</option>' . "\n";
diff --git a/libraries/server_links.inc.php b/libraries/server_links.inc.php
index 81962699d3..b8b4dcdb0a 100644
--- a/libraries/server_links.inc.php
+++ b/libraries/server_links.inc.php
@@ -27,7 +27,7 @@ if (!$GLOBALS['is_ajax_request']) {
     /**
      * Put something in $sub_part
      */
-    if (!isset($sub_part)) {
+    if (! isset($sub_part)) {
         $sub_part = '';
     }
 
diff --git a/libraries/session.inc.php b/libraries/session.inc.php
index 4f8caec6c4..465e3f0332 100644
--- a/libraries/session.inc.php
+++ b/libraries/session.inc.php
@@ -95,7 +95,7 @@ if (! isset($_COOKIE[$session_name])) {
  * Token which is used for authenticating access queries.
  * (we use "space PMA_token space" to prevent overwriting)
  */
-if (!isset($_SESSION[' PMA_token '])) {
+if (! isset($_SESSION[' PMA_token '])) {
     $_SESSION[' PMA_token '] = md5(uniqid(rand(), true));
 }
 
diff --git a/libraries/sqlparser.lib.php b/libraries/sqlparser.lib.php
index cbad1d6753..f13b5d61f5 100644
--- a/libraries/sqlparser.lib.php
+++ b/libraries/sqlparser.lib.php
@@ -46,7 +46,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
     if (!defined('TESTSUITE')) {
         require_once './libraries/mysql_charsets.lib.php';
     }
-    if (!isset($mysql_charsets)) {
+    if (! isset($mysql_charsets)) {
         $mysql_charsets = array();
         $mysql_charsets_count = 0;
         $mysql_collations_flat = array();
@@ -828,7 +828,7 @@ if (! defined('PMA_MINIMUM_COMMON')) {
      */
     function PMA_SQP_analyze($arr)
     {
-        if ($arr == array() || !isset($arr['len'])) {
+        if ($arr == array() || ! isset($arr['len'])) {
             return array();
         }
         $result          = array();
diff --git a/libraries/tbl_info.inc.php b/libraries/tbl_info.inc.php
index 00c990413f..ac3a26f95c 100644
--- a/libraries/tbl_info.inc.php
+++ b/libraries/tbl_info.inc.php
@@ -102,7 +102,7 @@ if ($showtable) {
         }
     }
     // we need explicit DEFAULT value here (different from '0')
-    $pack_keys = (!isset($pack_keys) || strlen($pack_keys) == 0) ? 'DEFAULT' : $pack_keys;
+    $pack_keys = (! isset($pack_keys) || strlen($pack_keys) == 0) ? 'DEFAULT' : $pack_keys;
     unset($create_options, $each_create_option);
 } // end if
 ?>
diff --git a/libraries/tbl_properties.inc.php b/libraries/tbl_properties.inc.php
index 54e9d1d9d4..395fa7be95 100644
--- a/libraries/tbl_properties.inc.php
+++ b/libraries/tbl_properties.inc.php
@@ -378,7 +378,7 @@ for ($i = 0; $i < $num_fields; $i++) {
      * having NULL enabled does not implicit having Default with NULL
      *
     if (isset($row)
-      && !isset($row['Default']) && isset($row['Null']) && $row['Null'] == 'YES') {
+      && ! isset($row['Default']) && isset($row['Null']) && $row['Null'] == 'YES') {
         $row['Default'] = 'NULL';
     }
      */
diff --git a/libraries/user_preferences.inc.php b/libraries/user_preferences.inc.php
index 2aad2e63a9..e93c477873 100644
--- a/libraries/user_preferences.inc.php
+++ b/libraries/user_preferences.inc.php
@@ -15,7 +15,7 @@ require './libraries/server_links.inc.php';
 // build user preferences menu
 
 $form_param = filter_input(INPUT_GET, 'form');
-if (!isset($forms[$form_param])) {
+if (! isset($forms[$form_param])) {
     $forms_keys = array_keys($forms);
     $form_param = array_shift($forms_keys);
 }
diff --git a/libraries/user_preferences.lib.php b/libraries/user_preferences.lib.php
index 6c48116d6f..cfba4e4322 100644
--- a/libraries/user_preferences.lib.php
+++ b/libraries/user_preferences.lib.php
@@ -51,7 +51,7 @@ function PMA_load_userprefs()
     $cfgRelation = PMA_getRelationsParam();
     if (!$cfgRelation['userconfigwork']) {
         // no pmadb table, use session storage
-        if (!isset($_SESSION['userconfig'])) {
+        if (! isset($_SESSION['userconfig'])) {
             $_SESSION['userconfig'] = array(
                 'db' => array(),
                 'ts' => time());
@@ -175,7 +175,7 @@ function PMA_apply_userprefs(array $config_data)
     $whitelist['Server/hide_db'] = true;
     $whitelist['Server/only_db'] = true;
     foreach ($config_data as $path => $value) {
-        if (!isset($whitelist[$path]) || isset($blacklist[$path])) {
+        if (! isset($whitelist[$path]) || isset($blacklist[$path])) {
             continue;
         }
         PMA_array_write($path, $cfg, $value);
diff --git a/prefs_forms.php b/prefs_forms.php
index 22ffb4cf5b..4aaea9c2bc 100644
--- a/prefs_forms.php
+++ b/prefs_forms.php
@@ -23,7 +23,7 @@ PMA_userprefs_pageinit();
 // handle form processing
 
 $form_param = filter_input(INPUT_GET, 'form');
-if (!isset($forms[$form_param])) {
+if (! isset($forms[$form_param])) {
     $forms_keys = array_keys($forms);
     $form_param = array_shift($forms_keys);
 }
diff --git a/schema_edit.php b/schema_edit.php
index a5d3a38ce1..149709f9f4 100644
--- a/schema_edit.php
+++ b/schema_edit.php
@@ -53,12 +53,12 @@ if (!$cfgRelation['displaywork']) {
     require_once './libraries/footer.inc.php';
 }
 
-if (!isset($cfgRelation['table_coords'])){
+if (! isset($cfgRelation['table_coords'])){
     echo sprintf(__('<b>%s</b> table not found or not set in %s'), 'table_coords', 'config.inc.php') . '<br />' . "\n"
          . PMA_showDocu('table_coords') . "\n";
     require_once './libraries/footer.inc.php';
 }
-if (!isset($cfgRelation['pdf_pages'])) {
+if (! isset($cfgRelation['pdf_pages'])) {
     echo sprintf(__('<b>%s</b> table not found or not set in %s'), 'pdf_page', 'config.inc.php') . '<br />' . "\n"
          . PMA_showDocu('pdf_pages') . "\n";
     require_once './libraries/footer.inc.php';
diff --git a/server_privileges.php b/server_privileges.php
index 19f9dcb999..daf8a990ba 100644
--- a/server_privileges.php
+++ b/server_privileges.php
@@ -270,7 +270,7 @@ function PMA_extractPrivInfo($row = '', $enableHTML = FALSE)
         } else {
             $privs[] = 'USAGE';
         }
-    } elseif ($allPrivileges && (!isset($GLOBALS['grant_count']) || count($privs) == $GLOBALS['grant_count'])) {
+    } elseif ($allPrivileges && (! isset($GLOBALS['grant_count']) || count($privs) == $GLOBALS['grant_count'])) {
         if ($enableHTML) {
             $privs = array('<dfn title="' . __('Includes all privileges except GRANT.') . '">ALL PRIVILEGES</dfn>');
         } else {
@@ -725,7 +725,7 @@ function PMA_displayLoginInformationFields($mode = 'new')
        . '    <select name="pred_username" id="select_pred_username" title="' . __('User name') . '"' . "\n"
        . '        onchange="if (this.value == \'any\') { username.value = \'\'; } else if (this.value == \'userdefined\') { username.focus(); username.select(); }">' . "\n"
        . '        <option value="any"' . ((isset($GLOBALS['pred_username']) && $GLOBALS['pred_username'] == 'any') ? ' selected="selected"' : '') . '>' . __('Any user') . '</option>' . "\n"
-       . '        <option value="userdefined"' . ((!isset($GLOBALS['pred_username']) || $GLOBALS['pred_username'] == 'userdefined') ? ' selected="selected"' : '') . '>' . __('Use text field') . ':</option>' . "\n"
+       . '        <option value="userdefined"' . ((! isset($GLOBALS['pred_username']) || $GLOBALS['pred_username'] == 'userdefined') ? ' selected="selected"' : '') . '>' . __('Use text field') . ':</option>' . "\n"
        . '    </select>' . "\n"
        . '</span>' . "\n"
        . '<input type="text" name="username" maxlength="'
@@ -756,7 +756,7 @@ function PMA_displayLoginInformationFields($mode = 'new')
     unset($_current_user);
 
     // when we start editing a user, $GLOBALS['pred_hostname'] is not defined
-    if (!isset($GLOBALS['pred_hostname']) && isset($GLOBALS['hostname'])) {
+    if (! isset($GLOBALS['pred_hostname']) && isset($GLOBALS['hostname'])) {
         switch (strtolower($GLOBALS['hostname'])) {
             case 'localhost':
             case '127.0.0.1':
@@ -850,7 +850,7 @@ if (isset($_REQUEST['change_copy'])) {
         // Recent MySQL versions have the field "Password" in mysql.user,
         // so the previous extract creates $Password but this script
         // uses $password
-        if (!isset($password) && isset($Password)) {
+        if (! isset($password) && isset($Password)) {
             $password = $Password;
         }
         $queries = array();
@@ -1140,7 +1140,7 @@ if (!empty($update_privs)) {
     $sql_query0 =
         'REVOKE ALL PRIVILEGES ON ' . $db_and_table
         . ' FROM \'' . PMA_sqlAddslashes($username) . '\'@\'' . PMA_sqlAddslashes($hostname) . '\';';
-    if (!isset($Grant_priv) || $Grant_priv != 'Y') {
+    if (! isset($Grant_priv) || $Grant_priv != 'Y') {
         $sql_query1 =
             'REVOKE GRANT OPTION ON ' . $db_and_table
             . ' FROM \'' . PMA_sqlAddslashes($username) . '\'@\'' . PMA_sqlAddslashes($hostname) . '\';';
@@ -1387,7 +1387,7 @@ $link_export = '<a class="export_user_anchor ' . $conditional_class . '" href="s
  * If we are in an Ajax request for Create User/Edit User/Revoke User/Flush Privileges,
  * show $message and exit.
  */
-if( $GLOBALS['is_ajax_request'] && !isset($_REQUEST['export']) && (!isset($_REQUEST['adduser']) || $_add_user_error) && !isset($_REQUEST['initial']) && !isset($_REQUEST['showall']) && !isset($_REQUEST['edit_user_dialog'])) {
+if( $GLOBALS['is_ajax_request'] && ! isset($_REQUEST['export']) && (! isset($_REQUEST['adduser']) || $_add_user_error) && ! isset($_REQUEST['initial']) && ! isset($_REQUEST['showall']) && ! isset($_REQUEST['edit_user_dialog'])) {
 
     if(isset($sql_query)) {
         $extra_data['sql_query'] = PMA_showMessage(NULL, $sql_query);
@@ -2056,7 +2056,7 @@ if (empty($_REQUEST['adduser']) && (! isset($checkprivs) || ! strlen($checkprivs
                 if ($res = @PMA_DBI_try_query('SHOW TABLES FROM ' . PMA_backquote(PMA_unescape_mysql_wildcards($dbname)) . ';', null, PMA_DBI_QUERY_STORE)) {
                     $pred_tbl_array = array();
                     while ($row = PMA_DBI_fetch_row($res)) {
-                        if (!isset($found_rows) || !in_array($row[0], $found_rows)) {
+                        if (! isset($found_rows) || !in_array($row[0], $found_rows)) {
                             $pred_tbl_array[] = $row[0];
                         }
                     }
@@ -2279,7 +2279,7 @@ if (empty($_REQUEST['adduser']) && (! isset($checkprivs) || ! strlen($checkprivs
             foreach ($current_privileges as $current) {
                 echo '        <td>' . "\n"
                    . '            ';
-                if (!isset($current['Db']) || $current['Db'] == '*') {
+                if (! isset($current['Db']) || $current['Db'] == '*') {
                     echo __('global');
                 } elseif ($current['Db'] == PMA_escape_mysql_wildcards($checkprivs)) {
                     echo __('database-specific');
diff --git a/setup/frames/form.inc.php b/setup/frames/form.inc.php
index 27429b44be..61484b2fed 100644
--- a/setup/frames/form.inc.php
+++ b/setup/frames/form.inc.php
@@ -21,7 +21,7 @@ require './libraries/config/setup.forms.php';
 
 $formset_id = filter_input(INPUT_GET, 'formset');
 $mode = filter_input(INPUT_GET, 'mode');
-if (!isset($forms[$formset_id])) {
+if (! isset($forms[$formset_id])) {
     die('Incorrect formset, check $formsets array in setup/frames/form.inc.php');
 }
 
diff --git a/setup/lib/ConfigGenerator.class.php b/setup/lib/ConfigGenerator.class.php
index 95c33251df..2872221c08 100644
--- a/setup/lib/ConfigGenerator.class.php
+++ b/setup/lib/ConfigGenerator.class.php
@@ -113,7 +113,7 @@ class ConfigGenerator
     private static function _isZeroBasedArray(array $array)
     {
         for ($i = 0; $i < count($array); $i++) {
-            if (!isset($array[$i])) {
+            if (! isset($array[$i])) {
                 return false;
             }
         }
diff --git a/setup/lib/index.lib.php b/setup/lib/index.lib.php
index aa0d0448c8..2e20e5da08 100644
--- a/setup/lib/index.lib.php
+++ b/setup/lib/index.lib.php
@@ -18,7 +18,7 @@ if (!defined('PHPMYADMIN')) {
  */
 function messages_begin()
 {
-    if (!isset($_SESSION['messages']) || !is_array($_SESSION['messages'])) {
+    if (! isset($_SESSION['messages']) || !is_array($_SESSION['messages'])) {
         $_SESSION['messages'] = array('error' => array(), 'notice' => array());
     } else {
         // reset message states
@@ -41,7 +41,7 @@ function messages_begin()
  */
 function messages_set($type, $id, $title, $message)
 {
-    $fresh = !isset($_SESSION['messages'][$type][$id]);
+    $fresh = ! isset($_SESSION['messages'][$type][$id]);
     $_SESSION['messages'][$type][$id] = array(
         'fresh' => $fresh,
         'active' => true,
diff --git a/sql.php b/sql.php
index 9b19174a44..d07022b568 100644
--- a/sql.php
+++ b/sql.php
@@ -33,7 +33,7 @@ if (! empty($goto)) {
     $is_gotofile  = true;
 } // end if
 
-if (!isset($err_url)) {
+if (! isset($err_url)) {
     $err_url = (!empty($back) ? $back : $goto)
              . '?' . PMA_generate_common_url($db)
              . ((strpos(' ' . $goto, 'db_') != 1 && strlen($table)) ? '&amp;table=' . urlencode($table) : '');
@@ -441,7 +441,7 @@ if (isset($GLOBALS['show_as_php']) || !empty($GLOBALS['validatequery'])) {
 
     if (!$is_affected) {
         $num_rows = ($result) ? @PMA_DBI_num_rows($result) : 0;
-    } elseif (!isset($num_rows)) {
+    } elseif (! isset($num_rows)) {
         $num_rows = @PMA_DBI_affected_rows();
     }
 
@@ -492,11 +492,11 @@ if (isset($GLOBALS['show_as_php']) || !empty($GLOBALS['validatequery'])) {
         // due to $find_real_end == true
 
         if (!$is_group
-         && !isset($analyzed_sql[0]['queryflags']['union'])
-         && !isset($analyzed_sql[0]['table_ref'][1]['table_name'])
+         && ! isset($analyzed_sql[0]['queryflags']['union'])
+         && ! isset($analyzed_sql[0]['table_ref'][1]['table_name'])
          && (empty($analyzed_sql[0]['where_clause'])
            || $analyzed_sql[0]['where_clause'] == '1 ')
-         && !isset($find_real_end)
+         && ! isset($find_real_end)
         ) {
 
             // "j u s t   b r o w s i n g"
@@ -526,7 +526,7 @@ if (isset($GLOBALS['show_as_php']) || !empty($GLOBALS['validatequery'])) {
             // long delays. Returned count will be complete anyway.
             // (but a LIMIT would disrupt results in an UNION)
 
-            if (!isset($analyzed_sql[0]['queryflags']['union'])) {
+            if (! isset($analyzed_sql[0]['queryflags']['union'])) {
                 $count_query .= ' LIMIT 1';
             }
 
@@ -969,7 +969,7 @@ window.onload = function()
 /**
  * Displays the footer
  */
-if(!isset($_REQUEST['table_maintenance'])) {
+if(! isset($_REQUEST['table_maintenance'])) {
     require './libraries/footer.inc.php';
 }
 ?>
diff --git a/tbl_change.php b/tbl_change.php
index 22584db43d..efdbd3fe73 100644
--- a/tbl_change.php
+++ b/tbl_change.php
@@ -514,7 +514,7 @@ foreach ($rows as $row_id => $vrow) {
         } else {
             // (we are inserting)
             // display default values
-            if (!isset($field['Default'])) {
+            if (! isset($field['Default'])) {
                 $field['Default'] = '';
                 $real_null_value          = TRUE;
                 $data                     = '';
@@ -620,7 +620,7 @@ foreach ($rows as $row_id => $vrow) {
                 // yet.
                 $cnt_functions = count($cfg['Functions']);
                 for ($j = 0; $j < $cnt_functions; $j++) {
-                    if (!isset($dropdown_built[$cfg['Functions'][$j]]) || $dropdown_built[$cfg['Functions'][$j]] != 'TRUE') {
+                    if (! isset($dropdown_built[$cfg['Functions'][$j]]) || $dropdown_built[$cfg['Functions'][$j]] != 'TRUE') {
                         // Is current function defined as default?
                         $selected = ($field['first_timestamp'] && $cfg['Functions'][$j] == $cfg['DefaultFunctions']['first_timestamp'])
                                     || (!$field['first_timestamp'] && $cfg['Functions'][$j] == $default_function)
@@ -1062,7 +1062,7 @@ if (isset($where_clause)) {
     <?php
 echo "\n";
 
-if (!isset($after_insert)) {
+if (! isset($after_insert)) {
     $after_insert = 'back';
 }
 ?>
diff --git a/tbl_printview.php b/tbl_printview.php
index 74b6818e4b..f2b80abfc6 100644
--- a/tbl_printview.php
+++ b/tbl_printview.php
@@ -189,7 +189,7 @@ foreach ($the_tables as $key => $table) {
         if ($zerofill) {
             $attribute = 'UNSIGNED ZEROFILL';
         }
-        if (!isset($row['Default'])) {
+        if (! isset($row['Default'])) {
             if ($row['Null'] != ''  && $row['Null'] != 'NO') {
                 $row['Default'] = '<i>NULL</i>';
             }
diff --git a/tbl_relation.php b/tbl_relation.php
index 400fc6319e..90bd153db0 100644
--- a/tbl_relation.php
+++ b/tbl_relation.php
@@ -186,7 +186,7 @@ if (isset($_REQUEST['destination_foreign'])) {
 
         if (! empty($foreign_string)) {
             list($foreign_db, $foreign_table, $foreign_field) = PMA_backquote_split($foreign_string);
-            if (!isset($existrel_foreign[$master_field])) {
+            if (! isset($existrel_foreign[$master_field])) {
                 // no key defined for this field
 
                 // The next few lines are repeated below, so they
diff --git a/tbl_replace.php b/tbl_replace.php
index 40d0ad48d6..5b722c69c9 100644
--- a/tbl_replace.php
+++ b/tbl_replace.php
@@ -276,7 +276,7 @@ foreach ($loop_array as $rownumber => $where_clause) {
 
         //  u p d a t e
         } elseif (!empty($me_fields_null_prev[$key])
-         && !isset($me_fields_null[$key])) {
+         && ! isset($me_fields_null[$key])) {
             // field had the null checkbox before the update
             // field no longer has the null checkbox
             $query_values[] = PMA_backquote($me_fields_name[$key]) . ' = ' . $cur_value;
diff --git a/tbl_select.php b/tbl_select.php
index 2cb0086293..ca6530a902 100644
--- a/tbl_select.php
+++ b/tbl_select.php
@@ -36,7 +36,7 @@ if ($GLOBALS['cfg']['PropertiesIconic'] == true) {
 /**
  * Not selection yet required -> displays the selection form
  */
-if (!isset($param) || $param[0] == '') {
+if (! isset($param) || $param[0] == '') {
     // Gets some core libraries
     require_once './libraries/tbl_common.php';
     //$err_url   = 'tbl_select.php' . $err_url;
@@ -52,7 +52,7 @@ if (!isset($param) || $param[0] == '') {
      */
     require_once './libraries/tbl_links.inc.php';
 
-    if (!isset($goto)) {
+    if (! isset($goto)) {
         $goto = $GLOBALS['cfg']['DefaultTabTable'];
     }
     // Defines the url to return to in case of error in the next sql statement
diff --git a/tbl_structure.php b/tbl_structure.php
index 99ec0e90a4..9878b9e263 100644
--- a/tbl_structure.php
+++ b/tbl_structure.php
@@ -337,7 +337,7 @@ while ($row = PMA_DBI_fetch_assoc($fields_rs)) {
     }
 
 
-    if (!isset($row['Default'])) {
+    if (! isset($row['Default'])) {
         if ($row['Null'] == 'YES') {
             $row['Default'] = '<i>NULL</i>';
         }
diff --git a/transformation_wrapper.php b/transformation_wrapper.php
index 3699dd0918..50d7ceba7a 100644
--- a/transformation_wrapper.php
+++ b/transformation_wrapper.php
@@ -71,7 +71,7 @@ if (isset($cn) && !empty($cn)) {
     header('Content-Disposition: attachment; filename=' . $cn);
 }
 
-if (!isset($resize)) {
+if (! isset($resize)) {
     echo $row[$transform_key];
 } else {
     // if image_*__inline.inc.php finds that we can resize,