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：
代碼如下:
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>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 id="fsUploadProgress">
<span>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" />
</div>
</form>
</div>
<div>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)傳遞獲取）
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。