PHP 关联组

Question

我是 PHP 的新手。谁能告诉我如何使用函数来安排以下关联数组？$ownerfiles =  ["Input.txt" => "Randy", "Code.py" => "Stan", "Output.txt" => "Randy"]; $ownerfiles = ["Randy" => ["Input.txt", "Output.txt"], "Stan" => ["Code.py"]];

Answer 1

我测试了下面的代码，它有效。我让它尽可能短。

$ownerfiles = ["Input.txt" => "Randy", "Code.py" => "Stan", "Output.txt" => "Randy"]; 

foreach ($ownerfiles as  $key => $value) {

    $new_arr[$value][]=$key;

}

print_r($new_arr);

// Output: 

//Array ( [Randy] => Array ( [0] => Input.txt [1] => Output.txt ) [Stan] => Array ( [0] => Code.py ) )