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run code in 150+ php & hhvm versions
Bugs & Features
<?php $matches=array(); $string = 'This is a [templateVar]'; preg_match_all("/\[[a-z]*\]/", $string, $matches); var_dump($matches);
based on jiMMs
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
array(1) { [0]=> array(0) { } }
Output for hhvm-3.10.0

Process exited with code 153.