如何使用PHP处理多个文件上传

问题描述

我想使用 PHP 上传文件，但问题是我不知道要上传多少个文件.

I want to upload files using PHP but the problem is that I don't know how many files I will upload.

我的问题是，如果我使用file[]，我该如何上传文件?

My question is how can I upload files if I use file[]?

<form action="upload.php" method="post" enctype="multipart/form-data">
<label for="file">Filename:</label><input type="file" name="file[]" id="file" /> 
<br />
<label for="file">Filename:</label><input type="file" name="file[]" id="file" /> 
<br />
<input type="submit" name="submit" value="Submit" />
</form>

我将只添加文件框，我将使用 JavaScript 创建更多要上传的文件输入，但如何在 PHP 中处理它们?

I will add just File box and I will use JavaScript to create more file input to upload but how to handle them in PHP?

推荐答案

参见:$_FILES, 处理文件上传

<?php
    if(isset($_FILES['file']['tmp_name']))
    {
        // Number of uploaded files
        $num_files = count($_FILES['file']['tmp_name']);

        /** loop through the array of files ***/
        for($i=0; $i < $num_files;$i++)
        {
            // check if there is a file in the array
            if(!is_uploaded_file($_FILES['file']['tmp_name'][$i]))
            {
                $messages[] = 'No file uploaded';
            }
            else
            {
                // copy the file to the specified dir 
                if(@copy($_FILES['file']['tmp_name'][$i],$upload_dir.'/'.$_FILES['file']['name'][$i]))
                {
                    /*** give praise and thanks to the php gods ***/
                    $messages[] = $_FILES['file']['name'][$i].' uploaded';
                }
                else
                {
                    /*** an error message ***/
                    $messages[] = 'Uploading '.$_FILES['file']['name'][$i].' Failed';
                }
            }
        }
    }
?>

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