- var_dump: documentation ( source)
- preg_match: documentation ( source)
<?php
$x = '/[^A-Za-z0-9 \r\n@£$¥èéùìòÇØøÅå\x{0394}\x{03A6}\x{0393}\x{039B}\x{03A9}\x{03A0}\x{03A8}\x{03A3}\x{0398}\x{039E}ÆæßÉ!"#$%&\'()*+,\-.\/:;<><=>?¡ÄÖÑܧ¿äöñüà^{}\\\[~\]|\u20AC]+/';
#$x = preg_quote($x,'/');
#var_dump($x);
$data = 'asdf‘‼';
$tmp = [];
$result = preg_match($x,$data,$tmp);
var_dump($result);
var_dump($tmp);