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run code in 200+ php & hhvm versions
Bugs & Features
<?php $days = array('2'); function alter_days($day) { echo 'bla'; } var_dump(array_walk($days, 'alter_days'));
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.2.0
blabool(true)