PHP: Url Prefixer

urlPrefixer.php

<?php 
/**
 * Prefix_protocol This function will search for http://, https://, ftp:// and ftps://, if none of them are in the string then we add the prefix to the start of the string
 * @param  string $url    get url
 * @param  string $prefix prefixer 
 * @return string         return full url with protocol
 * @author Mind Cracker <[email protected]>
 */
function prefix_protocol($url,$prefix='http://')
{
	if (! preg_match("~^(?:f|ht)tps?://~i", $url)) {

		$url = $prefix.$url;
	}

	return  $url;
}

// returns http://paulund.co.uk
prefix_protocol('paulund.co.uk');

// returns https://paulund.co.uk
prefix_protocol('paulund.co.uk', 'https://');

// returns ftp://paulund.co.uk
prefix_protocol('paulund.co.uk', 'ftp://');

// returns ftps://paulund.co.uk
prefix_protocol('paulund.co.uk', 'ftps://');

// returns http://paulund.co.uk
prefix_protocol('http://paulund.co.uk');

// returns https://paulund.co.uk
prefix_protocol('https://paulund.co.uk');

// returns ftp://paulund.co.uk
prefix_protocol('ftp://paulund.co.uk');

// returns ftps://paulund.co.uk
prefix_protocol('ftps://paulund.co.uk');


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