swfupload是一个flash插件它可以结合php来快速实现图片文件无刷新上传，同时还可以批量上传图片，下面我来给大家介绍PHP swfupload图片文件上传实例代码有需要了解的中参考。
效果图
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index.php文件
<title>SWFUpload Demos - SWFObject Demo</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", file_types : "*.jpg;*.gif;*.png;*.jpeg;", file_types_description : "All Files", 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_placeholder_id : "spanButtonPlaceholder", 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><div id="header"> <h1 id="a-href-SWFUpload-a"><a href="../">SWFUpload</a></h1> <div id="version">v2.2.0</div>
</div><div id="content"> <h2 id="SWFObject-Demo">SWFObject Demo</h2> <form id="form1" action="index.php" method="post" enctype="multipart/form-data"> <p> This page demonstrates the SWFObject plugin. Do each of the following (one at a time) to see the plugin work: </p> <ul> <li>Uninstall your Flash Player or install a version less than 9.0.28</li> <li>Cause the SWF file to fail to load by deleting or renaming swfupload.swf (simulating a very slow or failed download)</li> <li>Disable JavaScript</li> </ul> <p> Each of these tests demontrate how these issues can be handled by SWFUpload and the SWFObject libraries. </p> <div id="divSWFUploadUI"> <div class="fieldset flash" id="fsUploadProgress"> <span class="legend">Upload Queue</span> </div> <p id="divStatus">0 Files Uploaded</p> <p> <span id="spanButtonPlaceholder"></span> <input id="btnCancel" type="button" value="Cancel All Uploads" disabled style="margin-left: 2px; height: 22px; 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;"> We're sorry. SWFUpload could not load. You must have JavaScript enabled to enjoy SWFUpload. </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 is loading. Please wait a moment... </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 is taking a long time to load or the load has failed. Please make sure that the Flash Plugin is enabled and that a working version of the Adobe Flash Player is installed. </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;"> </div> </form>
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核心处理程序php代码
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']; $save = 'image/' . md5(uniqid($_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);}
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swfUpload注意事项
swfuplaod在上传时，会新开一个进程，和原来的进程不一致，要解决这个问题，需要指定session_id，然后在登录页面判断，如果有 post过来的session_id，那么就用函数session_id( $_POST['PHP_SESSIONID'])指定一下。
上传页的JS里面，可以获取当前的SESSION_ID的。
例如上传页的JS中：
post_params: {"PHPSESSID": "<?php echo session_id(); ?>"},
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在验证的判断页中：
if (isset($_POST["PHPSESSID"])) { session_id($_POST["PHPSESSID"]); }
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（这一段是网上的注释：在带有Session验证的网站后台中SWFUpload无法正常工作，这是因为SWFUpload在上传时相当于重新开辟了一个 新的Session 进程，因此无法与原有程序的Session保持一致，这就需要在上传时传递原有程序的SessionID，根据它来“找回”其应有的Session。）
DEMO下载地址：http://dl.iteye.com/topics/download/b6351ce4-b3e3-30a3-b8af-eda7b98a1c79
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