HTML5：多文件上传 Upload multiple files at once with HTML5, jQuery and PHP

来源：互联网发布：知乎课程的定义编辑：程序博客网时间：2024/04/30 02:18

The HTML

Nothing too fancy here, but do pay attention to the multipart attribute on the input element of type of file. This essentially tells the application to expect multiple files instead of a maximum of one.

Html代码  
<!DOCTYPE html>  
<html>  
    <head>  
        <meta charset="utf-8" />  
        <title>File Upload in PHP</title>  
        <!--[if IE]>  
            <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>  
        <![endif]-->  
        <link href="css/default.css" rel="stylesheet" type="text/css" />  
        <link href="css/font-awesome.min.css" rel="stylesheet" type="text/css" />  
    </head>  
    <body>  
        <div class="la-anim-10"></div><!-- .corner-preloader -->  
        <div id="wrapper">  
            <div id="upload-widget">  
                <h1>  
                    <i class="fa fa-cloud-upload"></i> File Uploader  
                </h1>  
  
                <form id="file-upload-form">  
                    <div class="file-input-wrap">  
                        Browse Files  
                        <input type="file" name="file" id="file" multiple>  
                    </div><!-- .file-input-wrap -->  
                </form><!-- #file-upload-form -->  
            </div><!-- #upload-widget -->  
  
            <div id="upload-result">  
            </div><!-- #upload-result -->  
        </div><!-- #wrapper -->  
  
        <div id="preloader">  
            <img src="img/preloader.gif" alt="files uploading..." />  
        </div>  
          
        <!-- SCRIPTS -->  
        <script type="text/javascript" src="js/libraries/jquery-2.1.1.min.js"></script>  
        <script type="text/javascript" src="js/custom.js"></script>  
    </body>  
</html>  

Note also the scripts at the bottom of the html markup. You will need the jQuery library and some jQuery code which will come later. This will sit in the custom.js file.

PHP Code

Next comes the PHP code. In your favorite code editor program (I used Sublime Text 3 for this) create a new file and call it file-upload.php. In there we simply loop through the $_FILES array given to us by PHP and for each entry we do what needs to be done!

Php代码  
<?php  
    // loop through the array of files  
    foreach($_FILES as $index => $file)  
    {  
        // for easy access  
        $fileName     = $file['name'];  
        // for easy access  
        $fileTempName = $file['tmp_name'];  
        // check if there is an error for particular entry in array  
        if(!emptyempty($file['error'][$index]))  
        {  
            // some error occurred with the file in index $index  
            // yield an error here  
            return false;  
        }  
  
        // check whether file has temporary path and whether it indeed is an uploaded file  
        if(!emptyempty($fileTempName) && is_uploaded_file($fileTempName))  
        {  
            // move the file from the temporary directory to somewhere of your choosing  
            move_uploaded_file($fileTempName, "uploads/" . $fileName);  
            // mark-up to be passed to jQuery's success function.  
            echo '<p>Click <strong><a href="uploads/'%20.%20$fileName%20.%20'" target="_blank">' . $fileName . '</a></strong> to download it.</p>';  
        }  
    }  
?>  

jQuery custom code

We will handle the submitting of the form via jQuery, we will also handle what exactly gets sent. Let us being by creating a file named custom.js and inside we will place the following code:

Js代码  
$(function() {  
    // grab the file input and bind a change event onto it  
    $('#file').bind("change", function() {  
        // new html5 formdata object.  
        var formData = new FormData();  
        //for each entry, add to formdata to later access via $_FILES["file" + i]  
        for (var i = 0, len = document.getElementById('file').files.length; i < len; i++) {  
            formData.append("file" + i, document.getElementById('file').files[i]);  
        }  
  
        //send formdata to server-side  
        $.ajax({  
            url: "file-upload.php", // our php file  
            type: 'post',  
            data: formData,  
            dataType: 'html', // we return html from our php file  
            async: true,  
            processData: false,  // tell jQuery not to process the data  
            contentType: false,   // tell jQuery not to set contentType  
            success : function(data) {  
                $('#upload-result').append('<div class="alert alert-success"><p>File(s) uploaded successfully!</p><br />');  
                $('#upload-result .alert').append(data);  
            },  
            error : function(request) {  
                console.log(request.responseText);  
            }  
        });  
    });  
});  

Note that we make use of HTML5’s FormData, so this will not work on older browsers. Always check caniuse.com for browser compatibilities.

In the HTML, ensure the referenced paths to the ‘custom.js’ file is correct. In my case, I have my custom.js file sitting inside a folder called js. I also have my ‘file-upload.php’ sitting next to my html file.

That is it! We are done. You now have a file input that can handle the upload of multiple files are once.

Note: If you are developing on your local machine and you’re using WAMP or XAMP, there are certain restrictions set in the php.ini file. These basically limit the size of the files to be uploaded and also how much time is allowed for a file to be uploaded. If you plan on uploading big files, ensure you update those settings to meet your need.

原文：http://www.code-hound.com/upload-multiple-files-at-once-with-jquery-and-php/

转自：HTML5：多文件上传 Upload multiple files at once with HTML5, jQuery and PHP

0 0