array_walk 有个原生递归函数 array_walk_recursive($arr, ‘function‘, ‘words‘)，但是 array_map 却没有对应的递归函数 array_map_recursive，
我们可以自定义一个：
function array_map_recursive($filter, $data) { ???$result = array(); ???foreach ($data as $key => $val) ????{ ???????$result[$key] = is_array($val) ????????? array_map_recursive($filter, $val) ????????: call_user_func($filter, $val); ???} ????return $result;}应用举例：
$arr = array( ???‘a‘ => ‘2‘, ???‘b‘ => array( ???????‘cc‘ => ‘wen‘, ???????‘dd‘ => ‘jian‘, ???????‘ee‘ => ‘bao‘ ???)); function func_a($value){ ???$value .= ‘_AAA‘; ???return $value;} var_dump($arr); $arr = array_map_recursive(‘func_a‘, $arr); var_dump($arr);其实吧，完全可以用 array_walk_recursive() 函数 实现该功能，如下代码所示：
$arr = array( ???‘a‘ => ‘2‘, ???‘b‘ => array( ???????‘cc‘ => ‘wen‘, ???????‘dd‘ => ‘jian‘, ???????‘ee‘ => ‘bao‘ ???)); function func_b(&$value){ ???$value .= ‘_AAA‘;} var_dump($arr); array_walk_recursive($arr, ‘func_b‘); var_dump($arr);输出：
array (size=2) ?‘a‘ => string ‘2‘ (length=1) ?‘b‘ => ????array (size=3) ?????‘cc‘ => string ‘wen‘ (length=3) ?????‘dd‘ => string ‘jian‘ (length=4) ?????‘ee‘ => string ‘bao‘ (length=3)
array (size=2) ?‘a‘ => string ‘2_AAA‘ (length=5) ?‘b‘ => ????array (size=3) ?????‘cc‘ => string ‘wen_AAA‘ (length=7) ?????‘dd‘ => string ‘jian_AAA‘ (length=8) ?????‘ee‘ => string ‘bao_AAA‘ (length=7)
php--------递归函数
原文地址：https://www.cnblogs.com/zhangqie/p/8408595.html