Question

我正在使用此代码将照片上传到服务器：

<?php

$currentName = $_SESSION["uID"];

// Check if the form was submitted
if($_SERVER["REQUEST_METHOD"] == "POST"){
    // Check if file was uploaded without errors
    if(isset($_FILES["photo"]) && $_FILES["photo"]["error"] == 0){
        $allowed = array("jpg" => "image/jpg", "jpeg" => "image/jpeg", "gif" => "image/gif", "png" => "image/png");
        $filename = $_FILES["photo"]["name"];
        $filetype = $_FILES["photo"]["type"];
        $filesize = $_FILES["photo"]["size"];
    
        // Verify file extension
        $ext = pathinfo($filename, PATHINFO_EXTENSION);
        if(!array_key_exists($ext, $allowed)) die("Error: Please select a valid file format.");
    
        // Verify file size - 5MB maximum
        $maxsize = 5 * 1024 * 1024;
        if($filesize > $maxsize) die("Error: File size is larger than the allowed limit.");
    
        // Verify MYME type of the file
        if(in_array($filetype, $allowed)){
            move_uploaded_file($_FILES["photo"]["tmp_name"], "img/profile_pictures/" . $filename);
            // Add code to redirect back
            
            header("location:".$_SERVER['HTTP_REFERER']);
            exit;
            
        } else{
            echo "Error: There was a problem uploading your file. Please try again."; 
        }
    } else{
        echo "Error: " . $_FILES["photo"]["error"];
    }
}
?>

现在，当用户上传时，img/profile_pictures中的文件名与所选文件的名称相同，但是我想将名称更改为$currentName的值。我尝试将$filename替换为$currentName，但不起作用。我该怎么做？

我尝试更改$filename，但扩展名消失了吗？：

move_uploaded_file($_FILES["photo"]["tmp_name"], "img/profile_pictures/" . $currentName);

Answer 1

对于扩展，您可以使用以下内容：

move_uploaded_file($_FILES["photo"]["tmp_name"], "img/profile_pictures/" . $currentName.$ext);

$ _ FILES [“照片”] [“类型”] 是您要上传的文件的扩展名。

或者您设置一个完整的新名称，例如：

$newname = "newfile.png";
move_uploaded_file($_FILES["photo"]["tmp_name"], "img/profile_pictures/" . $newname);

Answer 2

您错过了添加扩展名。如果使用!pip3 install requests进行扩展，则会出现错误。所以：

$_FILES["photo"]["type"]

我建议使用图像名称：

if($_FILES['photo']['type'] == "image/jpeg"){
   $ext= ".jpg";
}else{
   $ext= ".png";
}
...
move_uploaded_file($_FILES["photo"]["tmp_name"], "img/profile_pictures/" . $currentName.$ext);

PHP在上传之前更改文件名

2 个答案: