How to "flatten" a multi-dimensional array to simple one in PHP? [duplicate]

$array  = your array$result = call_user_func_array('array_merge', $array);echo "<pre>";print_r($result);

REF: http://php.net/manual/en/function.call-user-func-array.php

Here is another solution (works with multi-dimensional array) :

function array_flatten($array) {   $return = array();   foreach ($array as $key => $value) {       if (is_array($value)){ $return = array_merge($return, array_flatten($value));}       else {$return[$key] = $value;}   }   return $return;}$array  = Your array$result = array_flatten($array);echo "<pre>";print_r($result);

This is a one line, SUPER easy to use:

$result = array();array_walk_recursive($original_array,function($v) use (&$result){ $result[] = $v; });

It is very easy to understand, inside the anonymous function/closure. $v is the value of your $original_array.

Use array_walk_recursive

<?php$aNonFlat = array(    1,    2,    array(        3,        4,        5,        array(            6,            7        ),        8,        9,    ),    10,    11);$objTmp = (object) array('aFlat' => array());array_walk_recursive($aNonFlat, create_function('&$v, $k, &$t', '$t->aFlat[] = $v;'), $objTmp);var_dump($objTmp->aFlat);/*array(11) {  [0]=>  int(1)  [1]=>  int(2)  [2]=>  int(3)  [3]=>  int(4)  [4]=>  int(5)  [5]=>  int(6)  [6]=>  int(7)  [7]=>  int(8)  [8]=>  int(9)  [9]=>  int(10)  [10]=>  int(11)}*/?>

Tested with PHP 5.5.9-1ubuntu4.24 (cli) (built: Mar 16 2018 12:32:06)