如何在 php 上上传唯一命名的图片？

Question

您好，我有以下代码。我正在尝试使用 tempnam 函数上传具有唯一名称的图像。

$upfile = tempnam('client_images', '');
unlink($upfile);
//move_uploaded_file($_FILES['userfile']['tmp_name'], $upfile);

if($_FILES["userfile"]["type"] != "image/gif" && $_FILES["userfile"]["type"] != "image/pjpeg" && $_FILES["userfile"]["type"] != "image/png" && $_FILES["userfile"]["type"] != "image/jpeg") 
{ 
    echo "ERROR: You may only upload .jpg or .gif or .png files"; 
} 
else 
{ 
     if(!move_uploaded_file($_FILES["userfile"]["tmp_name"],$upfile)) 
     { 
     echo "ERROR: Could Not Move File into Directory"; 
     } 
     else 
     { 
     echo "Temporary File Name: " .$_FILES["userfile"]["tmp_name"]."<br />"; 
     echo "File Name: " .$_FILES["userfile"]["name"]."<br />"; 
     echo "File Size: " .$_FILES["userfile"]["size"]."<br />"; 
     echo "File Type: " .$_FILES["userfile"]["type"]."<br />"; 
     } 
    } 
    ?>

但是由于某些原因，我在 client_images 文件夹中看不到这些图像。

输出如下所示：

Temporary File Name: C:\Windows\Temp\phpA9F3.tmp
File Name: client.png

为什么 Temp 将其保存为 .tmp 而不是 .png? 我这样做有什么问题吗？

Answer 1

替换

if(!move_uploaded_file($_FILES["userfile"]["tmp_name"], $upfile)) {
    //take care of error
}

有

$nameyouwant = "sample"; //we'll use the extension from the source filename
$temp = explode(".", $_FILES["userfile"]["name"]);
$newfilename = $nameyouwant. '.' . end($temp); //add file extension
if(!move_uploaded_file($_FILES["userfile"]["tmp_name"],$upfile . $newfilename)) {
    //take care of error
}
else{
    //save success
}

如何在 php 上上传唯一命名的图片？

How to upload uniquely named image on php?

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