PHP实例：使用SWFUpload实现PHP上传进度条

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文件上传是WEB应用必备功能，尤其是在处理大文件上传的时候，十分需要上传时候实时显示上传进度。PhP实现上传进度条比较麻烦，一种是PhP创始人写的那个APC扩展，另外一种则需要使用PECL扩展模块uploadprogress实现。但是他们各有不足： 1、他们都需要额外安装(我们并没有打算把APC加入PhP5.2.6中)； 2、它们都使用本地机制来存储这些信息, APC使用共享内存, 而uploadprogress使用文件系统(不考虑NFS), 这在多台前端机的时候会造成麻烦。鉴于此，本文介绍一个最方便，也最简单的实现上传进度条的方法：使用swfload实现PhP上传进度条。可以实现多文件一起上传哦。

<!DOCTYPE html PUBLIC "-//W3C//DTD XhTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
<html xmlns="http://www.w3.org/1999/xhtml" >  
<head>  
<title>SWFUpload上传例子- SWFObject上传例子</title>  
<link href="../css/default.css" rel="stylesheet" type="text/css" />  
<script type="text/javascript" src="../swfupload/swfupload.js"></script>  
<script type="text/javascript" src="js/swfupload.swfobject.js"></script>  
<script type="text/javascript" src="js/swfupload.queue.js"></script>  
<script type="text/javascript" src="js/fileprogress.js"></script>  
<script type="text/javascript" src="js/handlers.js"></script>  
<script type="text/javascript">  
var swfu;   
  
SWFUpload.onload = function () {   
    var settings = {   
        flash_url : "../swfupload/swfupload.swf",   
        upload_url: "upload.php",   
        post_params: {   
            "PhPSESSID" : "NONE",   
            "hELLO-WORLD" : "here I Am",   
            ".what" : "OKAY"   
        },   
        file_size_limit : "100 MB",//文件大小限制   
        //file_types : "*.jpg;*.gif;*.png;*.jpeg;*.flv;*.mp4;*.avi;*wmv",   
        file_types : "*.*",   
        file_types_description : "All Files",//文件类型   
        file_upload_limit : 100,   
        file_queue_limit : 0,   
        custom_settings : {   
            progressTarget : "fsUploadProgress",   
            cancelButtonId : "btnCancel"   
        },   
        debug: false,   
  
        // Button Settings   
        //button_image_url : "XPButtonUploadText_61x22.png",   
        button_image_url: "TestImageNoText_65x29.png",//按钮图片   
        button_placeholder_id : "spanButtonPlaceholder",//按钮id   
        button_text: '<span class="theFont">浏览</span>',//按钮文字   
        button_text_style: ".theFont { font-size: 16; }",//按钮文字字号   
        button_text_left_padding: 12,//按钮左边距   
        button_text_top_padding: 3,//按钮上边距   
        button_width: "65",//按钮宽   
        button_height: "29",//按钮高   
        //button_width: 61,   
        //button_height: 22,   
  
        // The event handler functions are defined in handlers.js   
        swfupload_loaded_handler : swfUploadLoaded,   
        file_queued_handler : fileQueued,   
        file_queue_error_handler : fileQueueError,   
        file_dialog_complete_handler : fileDialogComplete,   
        upload_start_handler : uploadStart,   
        upload_progress_handler : uploadProgress,   
        upload_error_handler : uploadError,   
        upload_success_handler : uploadSuccess,   
        upload_complete_handler : uploadComplete,   
        queue_complete_handler : queueComplete, // Queue plugin event   
           
        // SWFObject settings   
        minimum_flash_version : "9.0.28",   
        swfupload_pre_load_handler : swfUploadPreLoad,   
        swfupload_load_failed_handler : swfUploadLoadFailed   
    };   
  
    swfu = new SWFUpload(settings);   
}   
  
</script>  
</head>  
<body>  
<div id="content">  
  
    <h2>SWFObject上传例子</h2>  
    <form id="form1" action="index.php" method="post" enctype="multipart/form-data">  
        <p>点击“浏览”按钮，选择您要上传的文档文件后，系统将自动上传并在完成后提示您。</p>  
            <div id="divSWFUploadUI">  
            <div class="fieldset  flash" id="fsUploadProgress"><span class="legend">快速上传</span></div>  
            <p id="divStatus">0 个文件已上传</p>  
            <p>  
                <span id="spanButtonPlaceholder"></span>  
                <input id="btnCancel" type="button" value="取消所有上传" disabled="disabled" style="margin-left: 2px; height: 29px; font-size: 8pt;" />  
                <br />  
            </p>  
        </div>  
        <noscript>  
            <div style="background-color: #FFFF66; border-top: solid 4px #FF9966; border-bottom: solid 4px #FF9966; margin: 10px 25px; padding: 10px 15px;">  
                对不起，您的浏览器不支持javascript。   
            </div>  
        </noscript>  
        <div id="divLoadingContent" class="content" style="background-color: #FFFF66; border-top: solid 4px #FF9966; border-bottom: solid 4px #FF9966; margin: 10px 25px; padding: 10px 15px; display: none;">  
            SWFUpload上传组件正在载入，请稍后   
        </div>  
        <div id="divLongLoading" class="content" style="background-color: #FFFF66; border-top: solid 4px #FF9966; border-bottom: solid 4px #FF9966; margin: 10px 25px; padding: 10px 15px; display: none;">  
            SWFUpload上传组件载入超时。  请确保Flash插件安装正确，并且版本支持本上传组件。   
        </div>  
        <div id="divAlternateContent" class="content" style="background-color: #FFFF66; border-top: solid 4px #FF9966; border-bottom: solid 4px #FF9966; margin: 10px 25px; padding: 10px 15px; display: none;">  
            SWFUpload不能载入.  请安装或升级Flash Player.   
            点击这里 <a href="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash">Adobe website</a> 获得Flash Player.   
        </div>  
    </form>  
</div>  
</body>  
</html>

upload.php部分：

if (isset($_FILES["Filedata"]) || !is_uploaded_file($_FILES["Filedata"]["tmp_name"]) || $_FILES["Filedata"]["error"] != 0) {   
    $upload_file = $_FILES['Filedata'];   
    $file_info   = pathinfo($upload_file['name']);   
    $file_type   = $file_info['extension'];   
    $save        = 'upload/' . md5(uniqid($_FILES["Filedata"]['name'])) . '.' . $file_info['extension'];   
    $name        = $_FILES['Filedata']['tmp_name'];   
       
    if (!move_uploaded_file($name, $save)) {   
        exit;   
    }   
       
    //将数组的输出存起来以供查看   
    $fileName = 'test.txt';   
    $postData = var_export($file_info, true);   
    $file     = fopen('' . $fileName, "w");   
    fwrite($file,$postData);   
    fclose($file);   
}

demo实例下载：点击我

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