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Posted By

and on 04/21/10


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array multidimensional


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Get array value by multidim array of keys

 / Published in: PHP
 

The first argument is a variable name which value should be extracted from $array (second argument), or array of keys (multidim array is also supported). The third argument is a default value which will be return on fail (false by default).

Usage examples:

1) $value = arraytraverse('user[name]', $POST);

2) $value = arraytraverse(array('user' => array('name' => '')), $POST);

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  1. function array_traverse($name, $array, $default = false) {
  2.     $v = array();
  3.  
  4.     if(is_string($name))
  5.         parse_str($name, $v);
  6.  
  7.     if(is_array($array) && is_array($v)) {
  8.         $ref =& $array;
  9.  
  10.         while(is_array($v)) {
  11.             $first_key = key($v);
  12.  
  13.             if(!is_null($first_key) && isset($ref[$first_key])) {
  14.                 $ref =& $ref[$first_key];
  15.                 $v = $v[$first_key];
  16.             } else
  17.                 return $default;
  18.         }
  19.  
  20.         return $ref;
  21.     }
  22.  
  23.     return $default;
  24. }

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