3v4l.org

run code in 300+ PHP versions simultaneously
<?php $kw = " asdsdfsdf as "; $pattern = var_export('/^((?![[:cntrl:]' . preg_quote(',!@%^*()={};~`<>?\|', '/') . ']).)*$/u'); var_dump($pattern); var_dump(preg_match($pattern, $kw));
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
'/^((?![[:cntrl:],\\!@%\\^\\*\\(\\)\\=\\{\\};~`\\<\\>\\?\\\\\\|]).)*$/u'NULL Deprecated: preg_match(): Passing null to parameter #1 ($pattern) of type string is deprecated in /in/DpqAK on line 7 Warning: preg_match(): Empty regular expression in /in/DpqAK on line 7 bool(false)
Output for 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
'/^((?![[:cntrl:],\\!@%\\^\\*\\(\\)\\=\\{\\};~`\\<\\>\\?\\\\\\|]).)*$/u'NULL Warning: preg_match(): Empty regular expression in /in/DpqAK on line 7 bool(false)
Output for 4.3.0 - 4.3.10
'/^((?![[:cntrl:],\\!@%\\^\\*\\(\\)\\=\\{\\};~`\\<\\>\\?\\\\\\|]).)*$/u'NULL Warning: Empty regular expression in /in/DpqAK on line 7 bool(false)
preferences:
249.05 ms | 402 KiB | 311 Q