<?php $nu_array = null; $callback = function ( $item ) use(&$callback, &$nu_array) { if (!is_array($item)) { $nu_array[] = $item; } else if ( is_array( $item ) ) { foreach( array_values($item) as $v) { if ( !(is_array($v))) { $nu_array[] = $v; } else { $callback( $v ); continue; } } } }; $array = array('alpha',array(1,2,3),'beta',array(7,8,array(9,10,array('gamma','epsilon',array(11,12,array('x','y')))))); array_walk($array, $callback); print_r($nu_array); /** Array ( ) **/
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