$re = '/\'^((?!mailto:)(?:(?:http|https|ftp)://)(?:\\\\S+(?::\\\\S*)?@)?(?:(?:(?:[1-9]\\\\d?|1\\\\d\\\\d|2[01]\\\\d|22[0-3])(?:\\\\.(?:1?\\\\d{1,2}|2[0-4]\\\\d|25[0-5])){2}(?:\\\\.(?:[0-9]\\\\d?|1\\\\d\\\\d|2[0-4]\\\\d|25[0-4]))|(?:(?:[a-z\\\\u00a1-\\\\uffff0-9]+-?)*[a-z\\\\u00a1-\\\\uffff0-9]+)(?:\\\\.(?:[a-z\\\\u00a1-\\\\uffff0-9]+-?)*[a-z\\\\u00a1-\\\\uffff0-9]+)*(?:\\\\.(?:[a-z\\\\u00a1-\\\\uffff]{2,})))|localhost)(?::\\\\d{2,5})?(?:(/|\\\\?|#)[^\\\\s]*)?)\.(png|jpg|jpeg|gif|PNG|JPG|JPEG|GIF)$\';
/';
$str = 'https://google.com.png';
preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0);
// Print the entire match result
var_dump($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