无法在PHP中上传文件

Question

以下是我的代码：

<?php
$name = $_FILES["file"]["name"];
$temp = $_FILES["file"]["temp"];
if(isset($name))
{
if(!empty($name))
{
$location= "upload/";
if(move_uploaded_file($temp, $location.$name))
{
echo "Uploaded!!!";
}
else
{
echo "Error:";
}
}
else
{
echo "Please choose a file to upload";
}
}
?>
<form action= "upload.php" method="POST" enctype="multipart/form-data">
<input type="file" name="file" ><br><br>
<input type="Submit" value="Submit" >
</form> 

每当我运行此代码时，我都会收到以下错误，请提供帮助。我是PHP新手，需要尽快学习。提前谢谢。

  

注意：未定义的索引：第3行的C：\ xampp \ htdocs \ testfolder \ upload.php中的temp。

Answer 1

$temp = $_FILES["file"]["temp"];应为$temp = $_FILES["file"]["tmp_name"];

Answer 2

是$ _FILES [“file”] [“tmp_name”];

提示： 执行$ _FILES变量的var_dump以查看它包含的内容。 后续代码var_dump（$ _ FILES）; 这会给你答案。

Answer 3

您应该检查是否在尝试将它们拉出阵列之前设置了值。与使用tmp_name代替temp mpaepper一样。

<?php
if(
    isset($_FILES["file"]["name"]) && !empty($_FILES["file"]["name"]) 
    && isset($_FILES["file"]["tmp_name"]) && !empty($_FILES["file"]["tmp_name"])
) {
    $name = $_FILES["file"]["name"];
    $temp = $_FILES["file"]["tmp_name"];
    $location= "upload/";
    if(move_uploaded_file($temp, $location.$name)) {
        echo "Uploaded!!!";
    } else {
        echo "Error:";
    }
} else {
    echo "Please choose a file to upload";
}
?>
<form action= "upload.php" method="POST" enctype="multipart/form-data">
<input type="file" name="file" ><br><br>
<input type="Submit" value="Submit" >
</form>