1ND:

<?php
	$start_time = microtime(TRUE);

	function incrementalHash($length = 6){
		$str = "";
		$characters = array_merge(range('A','Z'), range('a','z'), range('0','9'));
		$max = count($characters) - 1;
		for ($i = 0; $i < $length; $i++) {
			$rand = mt_rand(0, $max);
			$str .= $characters[$rand];
		}
		return $str;
	}

	echo $short_url = file_get_contents('http://urlig.win/api?api=API_CODE&url=youtube.com&alias=' . incrementalHash() . '&format=text');

	$end_time = microtime(TRUE);
	$time_taken =($end_time - $start_time);
	$time_taken = round($time_taken,5);

	echo ' - Link generated in '.$time_taken.' seconds.';
?>

2ND:

$long_url = urlencode($original);
$api_token = 'API_CODE';
$api_url = "http://urlig.win/api?api=$api_token&url=$long_url&alias=" . incrementalHash2() . "i" . incrementalHash2();
$result = @json_decode(file_get_contents($api_url),TRUE);
if($result["status"] === 'error') {
	echo $result["message"];
} else {
	echo $result["shortenedUrl"];
}

IncrementalHash:

function incrementalHash($length = 6){
	$str = "";
	$characters = array_merge(range('A','Z'), range('a','z'), range('0','9'));
	$max = count($characters) - 1;
	for ($i = 0; $i < $length; $i++) {
		$rand = mt_rand(0, $max);
		$str .= $characters[$rand];
	}
	return $str;
}

function incrementalHash2($length = 4) {
	$str = "";
	$characters = array_merge(range('A','Z'), range('a','z'), range('0','9'));
	$max = count($characters) - 1;
	for ($i = 0; $i < $length; $i++) {
		$rand = mt_rand(0, $max);
		$str .= $characters[$rand];
	}
	return $str;
}