使用['name']上传文件的php undefined index

Question

    <form action='' method='post'>
    <input type="file" class="form-control" name="kk">
    <input type="submit" class="form-control" name="submit">
    </form>
    <?php
    if(isset($_POST['submit'])){

    echo $_FILES["kk"]["name"]; 

    }
    ?>

嗨，我是php的新手，在这段代码中未定义索引kk即将上传文件，我只想要文件名...请帮帮我

Answer 1

添加enctype =＆＃34; multipart / form-data＆＃34;形成标签

Answer 2

当您需要上传文件

时，您需要传递enctype="multipart/form-data"

<form action='' method='post' enctype="multipart/form-data">
    <input type="file" class="form-control" name="kk">
    <input type="submit" class="form-control" name="submit">
    </form>
    <?php
    if(isset($_POST['submit'])){

    echo $_FILES["kk"]["name"]; 

    }
    ?>