3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $main_category_currency = 1; $children = array( array('id_category'=>10), array('id_category'=>15), ); function map($child) { return $child['id_category']; } $categories = array_unique(array_merge( array($main_category_currency), array_map(map,$children) ), SORT_NUMERIC); var_dump($categories);
Output for 5.2.9 - 7.1.0
Notice: Use of undefined constant map - assumed 'map' in /in/gNBoR on line 13 array(3) { [0]=> int(1) [1]=> int(10) [2]=> int(15) }
Output for 4.3.0 - 5.2.8
Notice: Use of undefined constant map - assumed 'map' in /in/gNBoR on line 13 Warning: Wrong parameter count for array_unique() in /in/gNBoR on line 14 NULL