php 한글 메뉴얼 도움말 검색 사이트 Apply a user function recursively to every member of an array [function.array-walk-recursive]

설명

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

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

인수

array: The input array.
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 reference. Then, any changes made to those elements will be made in the original array itself.
userdata: If the optional userdata parameter is supplied, it will be passed as the third parameter to the callback.

반환값

성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

예제

Example #1 array_walk_recursive() example


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

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

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

위 예제의 출력:

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.

참고

array_walk() - 배열의 각 원소에 대해서 특정 함수를 적용
callback형에 대한 정보