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<?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!"#$%&amp;\'()*+,\-.\/:;<>&lt;=&gt;?¡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);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: preg_match(): Compilation failed: character code point value in \x{} or \o{} is too large at offset 49 in /in/SBUUg on line 7 bool(false) array(0) { }
Output for 7.3.24 - 7.3.33, 7.4.12 - 7.4.33
int(1) array(1) { [0]=> string(2) "�" }
Output for 7.1.6
Warning: preg_match(): Compilation failed: character value in \x{} or \o{} is too large at offset 49 in /in/SBUUg on line 7 bool(false) array(0) { }

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