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run code in 200+ php & hhvm versions
Bugs & Features
<?php $array = array(1, "apples",2, "oranges",3, "plums"); //$filtered = array_filter( $array, "ctype_alpha"); var_dump($filtered); ?>
based on 9SdgU
Output for 5.3.20 - 7.2.0
Notice: Undefined variable: filtered in /in/nDrqe on line 5 NULL