使用SWFUpload插件上传文件

演示代码由两部分组成，包括前台文件和后台文件：

1.前台文件index.html

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">meta http-equiv="Content-Type" content="text/html; charset=gb2312"/>head>title>SWFUploadtitle>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.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;

        window.onload =function() {
            var settings = {
                flash_url : "swfupload/swfupload.swf",
                upload_url: "upload.php",    // 后台文件                post_params: {"PHPSESSID" : ""},
                file_size_limit : "100 MB",
                file_types : "*.*",
                file_types_description : "All Files",
                file_upload_limit : 100,
                file_queue_limit : 0,
                custom_settings : {
                    progressTarget : "fsUploadProgress",
                    cancelButtonId : "btnCancel"                },
                debug: false,

                // 按钮设置                button_image_url: "images/TestImageNoText_65x29.png",    // Flash样式图片文件                button_width: "65",
                button_height: "29",
                button_placeholder_id: "spanButtonPlaceHolder",
                button_text: '浏览',
                button_text_style: ".theFont { font-size: 16; }",
                button_text_left_padding: 12,
                button_text_top_padding: 3,
                
                // 句柄设置                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
            };

            swfu =new SWFUpload(settings);
         };
    script>head>body>div id="header">h1 id="logo">a href="/">SWFUploada>h1>div id="version">v2.2.0div>div>div id="content">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>p>请勿上传包含中文文件名的文件！p>div class="fieldset flash" id="fsUploadProgress">span class="legend">快速上传span>div>div id="divStatus">0 个文件已上传div>div>span id="spanButtonPlaceHolder">span>input id="btnCancel" type="button" value="取消所有上传" onclick="swfu.cancelQueue();" disabled="disabled" style="margin-left: 2px; font-size: 8pt; height: 29px;"/>div>form>div>div align="center">Hanization By a href="http://imll.net" target="_blank">Leo.C,a>div>body>html>

2.后台文件upload.php

php
// 传递session值（由于Flash与session不兼容，只能通过参数传递获取）if (isset($_POST["PHPSESSID"])) {
        session_id($_POST["PHPSESSID"]);
    } elseif (isset($_GET["PHPSESSID"])) {
        session_id($_GET["PHPSESSID"]);
    }

    session_start();

// 设置POST最大值$POST_MAX_SIZE = ini_get('post_max_size');
    $unit = strtoupper(substr($POST_MAX_SIZE, -1));
    $multiplier = ($unit == 'M' ? 1048576 : ($unit == 'K' ? 1024 : ($unit == 'G' ? 1073741824 : 1)));

    if ((int)$_SERVER['CONTENT_LENGTH'] > $multiplier*(int)$POST_MAX_SIZE && $POST_MAX_SIZE) {
        header("HTTP/1.1 500 Internal Server Error");
        echo "POST exceeded maximum allowed size.";
        exit(0);
    }

// 基本设置$save_path = getcwd() . "/file/";               　　　　　　　　　　　　// 文件上传位置$upload_name = "Filedata";
    $max_file_size_in_bytes = 2147483647;                　　　　　　　　　// 2GB$extension_whitelist = array("doc", "txt", "jpg", "gif", "png");    // 允许文件类型$valid_chars_regex = '.A-Z0-9_ !@#$%^&()+={}\[\]\',~`-';            // 文件名规则
    
// 其他变量$MAX_FILENAME_LENGTH = 260;
    $file_name = "";
    $file_extension = "";
    $uploadErrors = array(
        0=>"文件上传成功",
        1=>"上传的文件超过了 php.ini 文件中的 upload_max_filesize directive 里的设置",
        2=>"上传的文件超过了 HTML form 文件中的 MAX_FILE_SIZE directive 里的设置",
        3=>"上传的文件仅为部分文件",
        4=>"没有文件上传",
        6=>"缺少临时文件夹"    );


// 检测文件是否上传正确if (!isset($_FILES[$upload_name])) {
        HandleError("No upload found in \$_FILES for " . $upload_name);
        exit(0);
    } elseif (isset($_FILES[$upload_name]["error"]) && $_FILES[$upload_name]["error"] != 0) {
        HandleError($uploadErrors[$_FILES[$upload_name]["error"]]);
        exit(0);
    } elseif (!isset($_FILES[$upload_name]["tmp_name"]) || !@is_uploaded_file($_FILES[$upload_name]["tmp_name"])) {
        HandleError("Upload failed is_uploaded_file test.");
        exit(0);
    } elseif (!isset($_FILES[$upload_name]['name'])) {
        HandleError("File has no name.");
        exit(0);
    }
    
// 检测文件尺寸$file_size = @filesize($_FILES[$upload_name]["tmp_name"]);
    if (!$file_size || $file_size > $max_file_size_in_bytes) {
        HandleError("File exceeds the maximum allowed size");
        exit(0);
    }
    
    if ($file_size ) {
        HandleError(