php check if string ends with

function startsWith($haystack, $needle)
{
     $length = strlen($needle);
     return (substr($haystack, 0, $length) === $needle);
}

function endsWith($haystack, $needle)
{
    $length = strlen($needle);
    if ($length == 0) {
        return true;
    }

    return (substr($haystack, -$length) === $needle);
}

function endsWith( $haystack, $needle ) {
    $length = strlen( $needle );
    if( !$length ) {
        return true;
    }
    return substr( $haystack, -$length ) === $needle;
}

function endsWith($haystack,$needle,$case=true) {
    //If its case specific
    if($case){
      return (strcmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);
    }
    return (strcasecmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);
}