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run code in 150+ php & hhvm versions
Bugs & Features
<?php $foo = 'a quick red fox brown fox'; preg_match_all('#\b(rea|brown|fox)\b#', $foo, $bar); print count($bar[0]); print preg_quote('test|test2');
Output for 4.3.0 - 7.1.0
3test\|test2