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run code in 150+ php & hhvm versions
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<?php $pages = array('caonima'); array_walk($pages,'clean_name'); print_r($pages); function clean_name($name){ return ltrim($name,'cao'); }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => caonima )