$re = '/((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w\-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[.\!\/\\\\w]*))?)/i';
$str = 'The google search url www.google.com that we all used to love.
http://www.google.com is same as above except with the http protocol.
This of course a hyperlink to an email mailto:somebody@google.com
Someone\'s email address somebody@google.com
This is a web address www.url-with-querystring.com/?url=has-querystring&url-2=anotherstring ends with a query strings.';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php