Php get_string_between function

gistfile1.php

<?php

/**
 * get_string_between function.
 *
 * Given a string ($string) and two delimiters ($start and $end), this function
 * returns the substring between $start and $end. $start and $end are also
 * removed.
 *
 * @link http://www.justin-cook.com/wp/2006/03/31/php-parse-a-string-between-two-strings/
 * 
 * @access public
 * @param string $string
 * @param string $start
 * @param string $end
 * @return string the string between $start and $end
 */
function get_string_between($string, $start, $end){
	
	$string = ' ' . $string;
	$ini = strpos($string, $start);
	if ($ini == 0) {
		return '';
		
	}
	$ini += strlen($start);   
	$len = strpos($string, $end, $ini) - $ini;
	return substr($string, $ini, $len);
	
}