- var_dump: documentation ( source)
- preg_match: documentation ( source)
<?php
$x = "^[A-Za-z0-9 \r\n@£$¥èéùìòÇØøÅå\u0394_\u03A6\u0393\u039B\u03A9\u03A0\u03A8\u03A3\u0398\u039EÆæßÉ!\"#$%&'()*+,\-./:;<=>?¡ÄÖÑܧ¿äöñüà^{}\\\[~\]|\u20AC]*$";
$y = 'Hello there left quote “';
$result = preg_match($x,$y);
var_dump($result);