diff --git a/libraries/Partition.class.php b/libraries/Partition.class.php
index 243fd8649c..72137f81a3 100644
--- a/libraries/Partition.class.php
+++ b/libraries/Partition.class.php
@@ -63,7 +63,7 @@ class PMA_Partition
                 } else {
                     // see http://dev.mysql.com/doc/refman/5.6/en/partitioning.html
                     $plugins = PMA_DBI_fetch_result("SHOW PLUGINS");
-                    foreach ($plugins as $key => $value) {
+                    foreach ($plugins as $value) {
                         if ($value['Name'] == 'partition') {
                             $have_partitioning = true;
                             break;
diff --git a/libraries/Scripts.class.php b/libraries/Scripts.class.php
index 58cfbe89ce..c0d64d8ab1 100644
--- a/libraries/Scripts.class.php
+++ b/libraries/Scripts.class.php
@@ -52,7 +52,7 @@ class PMA_Scripts
     {
         $dynamic_scripts = "";
         $params = array();
-        foreach ($files as $key => $value) {
+        foreach ($files as $value) {
             if (strpos($value['filename'], "?") === false) {
                 $include = true;
                 if ($value['conditional_ie'] !== false && PMA_USR_BROWSER_AGENT === 'IE') {
diff --git a/libraries/TableSearch.class.php b/libraries/TableSearch.class.php
index a29c460950..e5a400bbe5 100644
--- a/libraries/TableSearch.class.php
+++ b/libraries/TableSearch.class.php
@@ -127,7 +127,7 @@ class PMA_TableSearch
         // Get details about the geometry fucntions
         $geom_types = PMA_Util::getGISDatatypes();
 
-        foreach ($columns as $key => $row) {
+        foreach ($columns as $row) {
             // set column name
             $this->_columnNames[] = $row['Field'];
 
diff --git a/libraries/core.lib.php b/libraries/core.lib.php
index c702387956..ccce887fa2 100644
--- a/libraries/core.lib.php
+++ b/libraries/core.lib.php
@@ -228,11 +228,6 @@ function PMA_fatalError(
             }
         }
 
-        $error_header = __('Error');
-
-        $lang = $GLOBALS['available_languages'][$GLOBALS['lang']][1];
-        $dir = $GLOBALS['text_dir'];
-
         // on fatal errors it cannot hurt to always delete the current session
         if ($delete_session
             && isset($GLOBALS['session_name'])
diff --git a/libraries/database_interface.lib.php b/libraries/database_interface.lib.php
index f4dcaf75cf..b865badf5b 100644
--- a/libraries/database_interface.lib.php
+++ b/libraries/database_interface.lib.php
@@ -192,15 +192,12 @@ function PMA_DBI_try_query($query, $link = null, $options = 0,
     $result = PMA_DBI_real_query($query, $link, $options);
 
     if ($cache_affected_rows) {
-        $GLOBALS['cached_affected_rows'] = PMA_DBI_affected_rows(
-            $link, $get_from_cache = false
-        );
+        $GLOBALS['cached_affected_rows'] = PMA_DBI_affected_rows($link, false);
     }
 
     if ($GLOBALS['cfg']['DBG']['sql']) {
         $time = microtime(true) - $time;
         PMA_DBI_DBG_query($query, $link, $result, $time);
-
     }
     if ($result != false && PMA_Tracker::isActive() == true ) {
         PMA_Tracker::handleQuery($query);
@@ -2024,7 +2021,7 @@ function PMA_DBI_get_triggers($db, $table = '', $delimiter = '//')
 
     // Sort results by name
     $name = array();
-    foreach ($result as $key => $value) {
+    foreach ($result as $value) {
         $name[] = $value['name'];
     }
     array_multisort($name, SORT_ASC, $result);
diff --git a/libraries/display_select_lang.lib.php b/libraries/display_select_lang.lib.php
index dacb7a5730..41a9098d2f 100644
--- a/libraries/display_select_lang.lib.php
+++ b/libraries/display_select_lang.lib.php
@@ -35,7 +35,7 @@ function PMA_languageCmp($a, $b)
  */
 function PMA_getLanguageSelectorHtml($use_fieldset = false, $show_doc = true)
 {
-    global $cfg, $lang;
+    global $lang;
 
     $retval = '';
 
@@ -66,7 +66,8 @@ function PMA_getLanguageSelectorHtml($use_fieldset = false, $show_doc = true)
                 . $language_title . ': </label></bdo>';
         }
 
-        $retval .= '<select name="lang" class="autosubmit" lang="en" dir="ltr" id="sel-lang">';
+        $retval .= '<select name="lang" class="autosubmit" lang="en"'
+            . ' dir="ltr" id="sel-lang">';
 
         uasort($GLOBALS['available_languages'], 'PMA_languageCmp');
         foreach ($GLOBALS['available_languages'] as $id => $tmplang) {
diff --git a/libraries/file_listing.lib.php b/libraries/file_listing.lib.php
index 70ee20a244..e5b680c2ca 100644
--- a/libraries/file_listing.lib.php
+++ b/libraries/file_listing.lib.php
@@ -59,7 +59,7 @@ function PMA_getFileSelectOptions($dir, $extensions = '', $active = '')
         return false;
     }
     $result = '';
-    foreach ($list as $key => $val) {
+    foreach ($list as $val) {
         $result .= '<option value="'. htmlspecialchars($val) . '"';
         if ($val == $active) {
             $result .= ' selected="selected"';
diff --git a/libraries/import.lib.php b/libraries/import.lib.php
index 35c03a679d..aa15847a6e 100644
--- a/libraries/import.lib.php
+++ b/libraries/import.lib.php
@@ -828,7 +828,6 @@ function PMA_analyzeTable(&$table)
 
     /* Temp vars */
     $curr_type = NONE;
-    $curr_size = 0;
 
     /* If the passed array is not of the correct form, do not process it */
     if (is_array($table)
diff --git a/libraries/insert_edit.lib.php b/libraries/insert_edit.lib.php
index 622d912c98..aa0ebbf043 100644
--- a/libraries/insert_edit.lib.php
+++ b/libraries/insert_edit.lib.php
@@ -173,7 +173,7 @@ function PMA_loadFirstRow($table, $db)
 function PMA_urlParamsInEditMode($url_params, $where_clause_array, $where_clause)
 {
     if (isset($where_clause)) {
-        foreach ($where_clause_array as $key_id => $where_clause) {
+        foreach ($where_clause_array as $where_clause) {
             $url_params['where_clause'] = trim($where_clause);
         }
     }
@@ -2102,7 +2102,7 @@ function PMA_transformEditedValues($db, $table,
                 = $transformation_plugin->applyTransformation(
                     $column_data,
                     $transform_options,
-                    $meta = ''
+                    ''
                 );
         }
     }   // end of loop for each transformation cell
diff --git a/libraries/js_escape.lib.php b/libraries/js_escape.lib.php
index e81d355d8e..42d7fed520 100644
--- a/libraries/js_escape.lib.php
+++ b/libraries/js_escape.lib.php
@@ -106,7 +106,7 @@ function PMA_getJsValue($key, $value, $escape = true)
         $result .= $value;
     } elseif (is_array($value)) {
         $result .= '[';
-        foreach ($value as $id => $val) {
+        foreach ($value as $val) {
             $result .= PMA_formatJsVal($val) . ",";
         }
         $result .= "];\n";
diff --git a/libraries/plugins/import/ImportCsv.class.php b/libraries/plugins/import/ImportCsv.class.php
index c50f671dca..7cfa292c11 100644
--- a/libraries/plugins/import/ImportCsv.class.php
+++ b/libraries/plugins/import/ImportCsv.class.php
@@ -245,7 +245,7 @@ class ImportCsv extends ImportPlugin
                     /* Trim also `, if user already included backquoted fields */
                     $val = trim($val, " \t\r\n\0\x0B`");
                     $found = false;
-                    foreach ($tmp_fields as $id => $field) {
+                    foreach ($tmp_fields as $field) {
                         if ($field['Field'] == $val) {
                             $found = true;
                             break;
@@ -457,7 +457,7 @@ class ImportCsv extends ImportPlugin
                     }
 
                     if ($this->_getAnalyze()) {
-                        foreach ($values as $ley => $val) {
+                        foreach ($values as $val) {
                             $tempRow[] = $val;
                             ++$col_count;
                         }
@@ -629,4 +629,4 @@ class ImportCsv extends ImportPlugin
     {
         $this->_analyze = $analyze;
     }
-}
\ No newline at end of file
+}
diff --git a/libraries/sqlparser.lib.php b/libraries/sqlparser.lib.php
index daadb3503b..d79758980a 100644
--- a/libraries/sqlparser.lib.php
+++ b/libraries/sqlparser.lib.php
@@ -344,7 +344,6 @@ function PMA_SQP_parse($sql)
             $startquotepos   = $count2;
             $quotetype       = $c;
             $count2++;
-            $escaped         = false;
             $pos             = $count2;
             $oldpos          = 0;
             do {
@@ -629,7 +628,6 @@ function PMA_SQP_parse($sql)
             } else {
                 // Bad luck, lets split it up more
                 $first  = $punct_data[0];
-                $first2 = $punct_data[0] . $punct_data[1];
                 $last2  = $punct_data[$l - 2] . $punct_data[$l - 1];
                 $last   = $punct_data[$l - 1];
                 if (($first == ',') || ($first == ';') || ($first == '.') || ($first == '*')) {
diff --git a/libraries/zip_extension.lib.php b/libraries/zip_extension.lib.php
index 4e2825fa0f..db493e7f43 100644
--- a/libraries/zip_extension.lib.php
+++ b/libraries/zip_extension.lib.php
@@ -97,7 +97,6 @@ function PMA_getZipContents($file, $specific_entry = null)
 function PMA_findFileFromZipArchive ($file_regexp, $file)
 {
     $zip_handle = zip_open($file);
-    $found = false;
     if (is_resource($zip_handle)) {
         $entry = zip_read($zip_handle);
         while (is_resource($entry)) {
@@ -124,7 +123,6 @@ function PMA_getNoOfFilesInZip($file)
 {
     $count = 0;
     $zip_handle = zip_open($file);
-    $found = false;
     if (is_resource($zip_handle)) {
         $entry = zip_read($zip_handle);
         while (is_resource($entry)) {