PHP foreach 更改原始数组值 [英] PHP foreach change original array values

问题描述

我对多维数组很陌生，这让我很烦恼.

I am very new in multi dimensional arrays, and this is bugging me big time.

我的数组如下:

$fields = array(
    "names" => array(
         "type"         => "text",
         "class"        => "name",
         "name"         => "name",
         "text_before"  => "name",
         "value"        => "",
         "required"     => true,
    )
)

然后我得到了一个函数来检查这些输入是否被填写，如果它们是必需的.

Then i got a function checking if these inputs are filled in, if they are required.

function checkForm($fields){
    foreach($fields as $field){
        if($field['required'] && strlen($_POST[$field['name']]) <= 0){
            $fields[$field]['value'] = "Some error";
        }
    }
    return $fields;
}

现在我的问题是这条线

$fields[$field]['value'] = "Some error";

我想更改原始数组的内容，因为我要返回它，但是如何在我的 foreach 循环中获取当前数组的名称(在此示例中为名称)?

I want to change the content of the original array, since i am returning this, but how do I get the name of the current array (names in this example) in my foreach loop?

推荐答案

在 PHP 中，通过引用传递 (&) 是......有争议的.我建议不要使用它，除非您知道为什么需要它并测试结果.

In PHP, passing by reference (&) is ... controversial. I recommend not using it unless you know why you need it and test the results.

我建议您执行以下操作:

I would recommend doing the following:

foreach ($fields as $key => $field) {
    if ($field['required'] && strlen($_POST[$field['name']]) <= 0) {
        $fields[$key]['value'] = "Some error";
    }
}

所以基本上在需要值时使用 $field，在需要更改数据时使用 $fields[$key].

So basically use $field when you need the values, and $fields[$key] when you need to change the data.

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