asort(3) [php man page]

ASORT(3)								 1								  ASORT(3)

asort - Sort an array and maintain index association

SYNOPSIS

       bool asort (array  &$array, [int  $sort_flags = SORT_REGULAR])

DESCRIPTION

	This  function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is
       used mainly when sorting associative arrays where the actual element order is significant.

PARAMETERS

	      o $array
		- The input array.

	      o $sort_flags
		- You may modify the behavior of the sort using the optional parameter $sort_flags, for details see sort(3).

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      asort(3) example

	      <?php
	      $fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
	      asort($fruits);
	      foreach ($fruits as $key => $val) {
		  echo "$key = $val
";
	      }
	      ?>

	      The above example will output:

	      c = apple
	      b = banana
	      d = lemon
	      a = orange

	       The fruits have been sorted in alphabetical order, and the index associated with each element has been maintained.

SEE ALSO

       arsort(3), The comparison of array sorting functions.

PHP Documentation Group 														  ASORT(3)

ARRAY_WALK_RECURSIVE(3) 						 1						   ARRAY_WALK_RECURSIVE(3)

array_walk_recursive - Apply a user function recursively to every member of an array

SYNOPSIS

       bool array_walk_recursive NULL (array  &$array, callable  $callback, [mixed  $userdata])

DESCRIPTION

	Applies the user-defined $callback function to each element of the $array. This function will recurse into deeper arrays.

PARAMETERS

	      o $array
		- The input array.

	      o $callback
		- Typically, $callback takes on two parameters. The $array parameter's value being the first, and the key/index second.

	      Note

		      If  $callback  needs to be working with the actual values of the array, specify the first parameter of $callback as a refer-
		     ence. Then, any changes made to those elements will be made in the original array itself.

	      o $userdata
		- If the optional $userdata parameter is supplied, it will be passed as the third parameter to the $callback.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      array_walk_recursive(3) example

	      <?php
	      $sweet = array('a' => 'apple', 'b' => 'banana');
	      $fruits = array('sweet' => $sweet, 'sour' => 'lemon');

	      function test_print($item, $key)
	      {
		  echo "$key holds $item
";
	      }

	      array_walk_recursive($fruits, 'test_print');
	      ?>

	      The above example will output:

	      a holds apple
	      b holds banana
	      sour holds lemon

	       You may notice that the key ' sweet' is never displayed. Any key that holds an array will not be passed to the function.

SEE ALSO

       array_walk(3), information about the callback type.

PHP Documentation Group 												   ARRAY_WALK_RECURSIVE(3)