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

Asked 2009-02-08T22:43:06.920
98

It's probably beginner question but I'm going through documentation for longer time already and I can't find any solution. I thought I could use implode for each dimension and then put those strings back together with str_split to make new simple array. However I never know if the join pattern isn't also in values and so after doing str_split my original values could break.

Is there something like combine($array1, $array2) for arrays inside of multi-dimensional array?

php arrays multidimensional-array
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1 Answer

151
$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);
answered 2013-02-20T05:11:37.630

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