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

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