Ticket #16918: 16918.2.diff

wp-includes/compat.php

@@ +1 @@
+<?php
+/**
+ * WordPress implementation for PHP functions missing from older PHP versions.
+ *
+ * @package PHP
+ * @access private
+ */
+
+// Added in PHP 5.0
+
+// If gettext isn't available
+if ( !function_exists('_') ) {
+        function _($string) {
+                return $string;
+        }
+}
+
+if ( !function_exists('mb_substr') ):
+        function mb_substr( $str, $start, $length=null, $encoding=null ) {
+                // the solution below, works only for utf-8, so in case of a different
+                // charset, just use built-in substr
+                $charset = get_option( 'blog_charset' );
+                if ( !in_array( $charset, array('utf8', 'utf-8', 'UTF8', 'UTF-8') ) ) {
+                        return is_null( $length )? substr( $str, $start ) : substr( $str, $start, $length);
+                }
+                // use the regex unicode support to separate the UTF-8 characters into an array
+                preg_match_all( '/./us', $str, $match );
+                $chars = is_null( $length )? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
+                return implode( '', $chars );
+        }
+endif;