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) . ",";
         }
         $result .= "];\n";
diff --git a/libraries/sqlparser.lib.php b/libraries/sqlparser.lib.php
index daadb3503b..d79758980a 100644
--- a/libraries/sqlparser.lib.php
+++ b/libraries/sqlparser.lib.php
@@ -344,7 +344,6 @@ function PMA_SQP_parse($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)) {