php string starts_with() ends_with()

gistfile1.php

<?php
function starts_with($haystack, $needle) {
	
	// search backwards starting from haystack length characters from the end
	return $needle === "" || strrpos($haystack, $needle, -strlen($haystack)) !== false;
	
}

function ends_with($haystack, $needle) {
	
	// search forward starting from end minus needle length characters
	return $needle === "" || (($temp = strlen($haystack) - strlen($needle)) >= 0 && strpos($haystack, $needle, $temp) !== false);
	
}