/**
* Finds position of first occurrence of a UTF-8 string. This is a
* UTF8-aware version of [strpos](http://php.net/strpos).
*
* $position = UTF8::strpos($str, $search);
*
* @author Harry Fuecks <*****@*****.**>
* @param string $str haystack
* @param string $search needle
* @param integer $offset offset from which character in haystack to start searching
* @return integer position of needle
* @return boolean FALSE if the needle is not found
* @uses UTF8::$server_utf8
* @uses Kohana::$charset
*/
public static function wpstrpos($str, $search, $offset = 0)
{
$offset = (int) $offset;
if (UTF8::is_ascii($str) and UTF8::is_ascii($search)) {
return strpos($str, $search, $offset);
}
if ($offset == 0) {
$array = explode($search, $str, 2);
return isset($array[1]) ? UTF8::wpstrlen($array[0]) : FALSE;
}
$str = UTF8::wpsubstr($str, $offset);
$pos = UTF8::wpstrpos($str, $search);
return $pos === FALSE ? FALSE : $pos + $offset;
}