文件上传之SWFUpload插件（代码）

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文件上传之SWFUpload插件（代码）

这篇文章主要介绍了文件上传之SWFUpload插件（代码）,实现此代码主要分为两部分：1.前台文件index.html和 2.后台文件upload.php，需要的朋友可以参考下。

下面通过一段代码给大家演示下，主要分为1.前台文件index.html和 2.后台文件upload.php，具体代码如下所示：

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>SWFUpload</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.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" : "<?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: '<span class="theFont">浏览</span>',

    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="/">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>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"]);

} else if (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);

} 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);

}

// 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 <= 0) {

  HandleError("File size outside allowed lower bound");

  exit(0);

}

// 检测文件名字为空

$file_name = preg_replace('/[^'.$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);

}

// 检测重名文件

if (file_exists($save_path . $file_name)) {

  HandleError("File with this name already exists");

  exit(0);

}

// 检测后缀名

$path_info = pathinfo($_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("文件无法保存.");

  exit(0);

}

// 成功输出

  echo "File Received";

exit(0);

function HandleError($message) {

header("HTTP/1.1 500 Internal Server Error");

echo $message;

}

?>

以上代码就是实现文件上传之SwFUpload插件的全部内容，希望大家喜欢。

出处：http://www.phpfensi.com/php/20210614/16351.html

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