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run code in 150+ php & hhvm versions
Bugs & Features
<?php $selector = 'p:before'; preg_match('~::?(?:first-(?:letter|line)|before|after|selection|value|choices|repeat-(?:item|index)|outside|alternate|(?:line-)?marker|slot\([_a-z0-9+.\\\\-]*\))~i', $selector, $matches); var_dump($matches, $selector);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(1) { [0]=> string(7) ":before" } string(8) "p:before"