Cache $PHP_SELF value, add ability to make custom changes to $PHP_SELF by putting $php_self_pattern and $php_self_replacement in config/config_local.php

functions/global.php

@@ -697,10 +697,12 @@ if (!function_exists('session_regenerate_id')) {
  * @return string The path, filename and any arguments for the
  *                current script
  */
-function php_self() {
-
-    $request_uri = '';
+function php_self($with_query_string=TRUE) {
 
+    static $request_uri = '';
+    if (!empty($request_uri))
+        return ($with_query_string ? $request_uri : (strpos($request_uri, '?') !== FALSE ? substr($request_uri, 0, strpos($request_uri, '?')) : $request_uri));
+ 
     // first try $_SERVER['PHP_SELF'], which seems most reliable
     // (albeit it usually won't include the query string)
     //
@@ -733,7 +735,10 @@ function php_self() {
         $request_uri .= '?' . $query_string;
     }   
 
-    return $request_uri;
+    global $php_self_pattern, $php_self_replacement;
+    if (!empty($php_self_pattern))
+        $request_uri = preg_replace($php_self_pattern, $php_self_replacement, $request_uri);
+    return ($with_query_string ? $request_uri : (strpos($request_uri, '?') !== FALSE ? substr($request_uri, 0, strpos($request_uri, '?')) : $request_uri));
 
 }
 

functions/strings.php

@@ -474,12 +474,7 @@ function get_location () {
            $is_secure_connection, $sq_ignore_http_x_forwarded_headers;
 
     /* Get the path, handle virtual directories */
-    if(strpos(php_self(), '?')) {
-        $path = substr(php_self(), 0, strpos(php_self(), '?'));
-    } else {
-        $path = php_self();
-    }
-    $path = substr($path, 0, strrpos($path, '/'));
+    $path = substr(php_self(FALSE), 0, strrpos(php_self(FALSE), '/'));
 
     // proto+host+port are already set in config:
     if ( !empty($config_location_base) ) {