var_dump()返回零arry.无法上传PHP文件

Question

upload.php的

var_dump()函数返回零数组.我在这做错了什么？

<form method="post" action="upload.php">

    <input type="file" name ="file" id="file"><input type="submit" value="upload">

</form>
<?php 


if(isset($_POST['file']))
{   


   var_dump($_FILES);


}   
?>

Answer 1

您需要添加formenctype

<form method="post" action="upload.php" enctype="multipart/form-data">