Question

我想编写一个修改数组的函数：

function addDataToArray($array,array("data","userdata","username"),"john") { // do something here }

结果将是$ array [＆＃34;数据＆＃34;] [＆＃34; userdata＆＃34;] [＆＃34;用户名＆＃34;] =＆＃34; john＆＃34;

我意识到以正常方式实现这一目标要容易得多，但我需要了解是否可以这样做。感谢

Answer 1

此代码应该适合您。我有点受到question的启发：

function addDataToArray(&$array,$input_array,$string) { 

    $count = count($input_array)-1;
    $tmp = array($input_array[$count]=>$string);

    for ($i=$count-1;$i>=0;$i--) {
        $arr = array();
        $arr[$input_array[$i]] = $tmp;
        $tmp = $arr;
    }

    $array = array_merge($array, $arr);
}

$array = array(); //or your inicialized $array
addDataToArray($array,array("data","userdata","username"),"john");

var_dump($array);

Answer 2

使用递归

$array = array("foo" => "bar"); 

function addDataToArray(&$a, $path, $val) 
{ 
    if (count($path) == 1) { 
        $path = $path[0]; 
    } 
    if (!is_array($path)) { 
        $a[$path] = $val; 
        return $a; 
    } 
    $b = array(); 
    $a[array_shift($path)] = addDataToArray($b, $path, $val); 
    return $a; 
} 
addDataToArray($array, array("data","userdata","username"),"john"); 
var_dump($array);

结果

array(2) {
  ["foo"]=>
  string(3) "bar"
  ["data"]=>
  array(1) {
    ["userdata"]=>
    array(1) {
      ["username"]=>
      string(4) "john"
    }
  }
}

修改php中函数内的多维数组

2 个答案: