Unspecified error with a file upload loop

2018-06-26 23:08:32

I'm using a form and a loop to upload multiple image files directly to the file server, but I'm getting a false result with the move_uploaded_file function.

Upload Form:

<body>
    <p>
        <form action='uploadform.php' method='post' enctype='multipart/form-data'>
            Select the files you would like to upload.
            <input type='file' name='fileToUpload[]' id='fileToUpload' mozdirectory webkitdirectory directory multiple />
            <input type='submit' value='Upload Image' name='submit'>
        </form><br>
    The files will be uploaded to a folder named '".$_SESSION['filename']."'.<br>
    </p>
</body>

Multiple file uploading loop (uploadform.php:

if (isset($_POST["submit"])){
    foreach ($_FILES['fileToUpload']['name'] as $i => $name) {
        $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"][$i]);
        $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
        if (strlen($_FILES['fileToUpload']['name'][$i]) > 1) {
            if (move_uploaded_file($_FILES["fileToUpload"]["name"][$i], $target_file)) {
                echo "The file'". basename($_FILES["fileToUpload"]["name"][$i]). "' has been uploaded to the server.";
            } else {
                echo "<br>*** ERROR ***<br>";
                echo "Current File basename: ".basename($_FILES["fileToUpload"]["name"][$i])."<br>";
                echo "Current File non-basename: ".$_FILES["fileToUpload"]["name"][$i]."<br>";
                echo "Current File Path: ".$target_file."<br>";
                echo "Image file type: ".$imageFileType."<br>";
            }
            $count++;
        }
    }
}

When uploading one or multiple files with the form, it goes to the else statement echoing the "ERROR" string. The Apache Error Log comes up blank, so I have no clue what's wrong with the code.

I tried echoing the variables used in the loop ($_FILES["fileToUpload"]["name"][$i], $target_file and $imageFileType) but these seem to be fine.

我会把整个foreach循环放在try-catch块中，看看发生了什么异常：

try{
     // your foreach loop here:
    }
catch(Exception $e)
{
  echo $e->getMessage();
 }

The $_FILES["fileToUpload"]["name"][$i] variable was not the one that the loop was supposed to use.

By changing all instances of $_FILES["fileToUpload"]["name"][$i] to $name (which is $_FILES["fileToUpload"]["tmp_name"][$i] ) the error was gone.

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