<?php
/* Prototype  : bool array_walk(array $input, string $funcname [, mixed $userdata])
 * Description: Apply a user function to every member of an array 
 * Source code: ext/standard/array.c
*/

/*
 * Testing array_walk() with an array having subarrays as elements 
*/

echo "*** Testing array_walk() : array with subarray ***\n";

// callback function
/* Prototype : callback(mixed $value, mixed $key)
 * Parameters : $value - values in given 'input' array
 *              $key - keys in given 'input' array
 * Description : It prints the count of an array elements, passed as argument
 */
function callback($value, $key)
{
   // dump the arguments to check that they are passed
   // with proper type
   var_dump($key);  // key
   var_dump($value); // value
   echo "\n"; // new line to separate the output between each element
}

$input = array(
  array(),
  array(1),
  array(1,2,3),
  array("Mango", "Orange"),
  array(array(1, 2, 3))
);

var_dump( array_walk( $input, "callback"));

echo "Done"
?>
