Question

I m 试图了解什么具体内容:$key =>$tmp_name正在以下代码中:

if(isset($_FILES[ files ]))
{
    foreach($_FILES[ files ][ tmp_name ] as $key => $tmp_name)
    {
        echo $_FILES[ files ][ name ][$key], "
";
        move_uploaded_file($tmp_name,  img/ .$_FILES[ files ][ name ][$key]);
    }
}

Answer 1

This is how you access your values if you have an upload form that has multiple fields, all named files[] or files[x] where x is a number:

例如:

<input type="file" name="files[]" />    // first field
<input type="file" name="files[]" />    // ...
<input type="file" name="files[]" />    // ...

混淆的是,发送的数值不按指数分类,而是按其财产分类(err,tmp_name, 等)。

<><>Edit>: 根据您的编辑,我建议在foreach和>> arrays <<<>/a> 一般而言。

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