文件上傳之SWFUpload插件（代碼）

更新時間：2015年07月30日 14:20:15 作者：boystar

這篇文章主要介紹了文件上傳之SWFUpload插件（代碼）,實現(xiàn)此代碼主要分為兩部分：1.前臺文件index.html和 2.后臺文件upload.php，需要的朋友可以參考下

下面通過一段代碼給大家演示下，主要分為1.前臺文件index.html和 2.后臺文件upload.php。具體代碼如下所示：

1.前臺文件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>SWFUpload</title>
<link href="css/default.css" rel="stylesheet" type="text/css" />
<!--Swfupload插件begin-->
<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>
<!--Swfupload插件end-->
<script type="text/javascript">
  var swfu;
   window.onload = function() {
   var settings = {
    flash_url : "swfupload/swfupload.swf",
    upload_url: "upload.php", // 后臺文件
    post_params: {"PHPSESSID" : "<?php echo session_id(); ?>"},
    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,
     // 按鈕設置
    button_image_url: "images/TestImageNoText_65x29.png", // Flash樣式圖片文件
    button_width: "65",
    button_height: "29",
    button_placeholder_id: "spanButtonPlaceHolder",
    button_text: '<span class="theFont">瀏覽</span>',
    button_text_style: ".theFont { font-size: 16; }",
    button_text_left_padding: 12,
    button_text_top_padding: 3,
     // 句柄設置
    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="/">SWFUpload</a></h1>
 <div id="version">v2.2.0</div>
</div>
 <div id="content">
 <form id="form1" action="index.php" method="post" enctype="multipart/form-data">
  <p>點擊“瀏覽”按鈕，選擇您要上傳的文檔文件后，系統(tǒng)將自動上傳并在完成后提示您。</p>
  <p>請勿上傳包含中文文件名的文件！</p>
  <div class="fieldset flash" id="fsUploadProgress">
   <span class="legend">快速上傳</span>
  </div>
  <div id="divStatus">0 個文件已上傳</div>
   <div>
    <span id="spanButtonPlaceHolder"></span>
    <input id="btnCancel" type="button" value="取消所有上傳" onclick="swfu.cancelQueue();" disabled="disabled" style="margin-left: 2px; font-size: 8pt; height: 29px;" />
   </div>
  </form>
</div>
<div align="center">Hanization By <a  target="_blank">Leo.C,</a>
</div>
</body>
</html>

2.后臺文件upload.php

 <?php
 // 傳遞session值（由于Flash與session不兼容，只能通過參數(shù)傳遞獲?。?
 if (isset($_POST["PHPSESSID"])) {
  session_id($_POST["PHPSESSID"]);
 } else if (isset($_GET["PHPSESSID"])) {
  session_id($_GET["PHPSESSID"]);
 }
  session_start();
 // 設置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);
 }
 // 基本設置
 $save_path = getcwd() . "/file/";    　　　　　　　　　　　　// 文件上傳位置
 $upload_name = "Filedata";
 $max_file_size_in_bytes = 2147483647;    　　　　　　　　　// 2GB
 $extension_whitelist = array("doc", "txt", "jpg", "gif", "png"); // 允許文件類型
 $valid_chars_regex = '.A-Z0-9_ !@#$%^&()+={}\[\]\',~`-';   // 文件名規(guī)則
 // 其他變量
 $MAX_FILENAME_LENGTH = 260;
 $file_name = "";
 $file_extension = "";
 $uploadErrors = array(
  0=>"文件上傳成功",
  1=>"上傳的文件超過了 php.ini 文件中的 upload_max_filesize directive 里的設置",
  2=>"上傳的文件超過了 HTML form 文件中的 MAX_FILE_SIZE directive 里的設置",
  3=>"上傳的文件僅為部分文件",
  4=>"沒有文件上傳",
  6=>"缺少臨時文件夾"
 );
 // 檢測文件是否上傳正確
 if (!isset($_FILES[$upload_name])) {
  HandleError("No upload found in \$_FILES for " . $upload_name);
  exit(0);
 } else if (isset($_FILES[$upload_name]["error"]) && $_FILES[$upload_name]["error"] != 0) {
  HandleError($uploadErrors[$_FILES[$upload_name]["error"]]);
  exit(0);
 } else if (!isset($_FILES[$upload_name]["tmp_name"]) || !@is_uploaded_file($_FILES[$upload_name]["tmp_name"])) {
  HandleError("Upload failed is_uploaded_file test.");
  exit(0);
 } else if (!isset($_FILES[$upload_name]['name'])) {
  HandleError("File has no name.");
  exit(0);
 }
 // 檢測文件尺寸
 $file_size = @filesize($_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 <= 0) {
  HandleError("File size outside allowed lower bound");
  exit(0);
 }
 // 檢測文件名字為空
 $file_name = preg_replace('/[^'.$valid_chars_regex.']|\.+$/i', "", basename($_FILES[$upload_name]['name']));
 if (strlen($file_name) == 0 || strlen($file_name) > $MAX_FILENAME_LENGTH) {
  HandleError("Invalid file name");
  exit(0);
 }
 // 檢測重名文件
 if (file_exists($save_path . $file_name)) {
  HandleError("File with this name already exists");
  exit(0);
 }
 // 檢測后綴名
 $path_info = pathinfo($_FILES[$upload_name]['name']);
 $file_extension = $path_info["extension"];
 $is_valid_extension = false;
 foreach ($extension_whitelist as $extension) {
  if (strcasecmp($file_extension, $extension) == 0) {
   $is_valid_extension = true;
   break;
  }
 }
 if (!$is_valid_extension) {
  HandleError("Invalid file extension");
  exit(0);
 }
 // 保存文件
 if (!@move_uploaded_file($_FILES[$upload_name]["tmp_name"], $save_path.$file_name)) {
  HandleError("文件無法保存.");
  exit(0);
 }
 // 成功輸出
  echo "File Received";
 exit(0);
 function HandleError($message) {
 header("HTTP/1.1 500 Internal Server Error");
 echo $message;
}
?>

以上代碼就是實現(xiàn)文件上傳之SwFUpload插件的全部內(nèi)容，希望大家喜歡。

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