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
<span><!</span><span>DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"</span><span>></span>
<span><</span><span>html </span><span>xmlns</span><span>="http://www.w3.org/1999/xhtml"</span> <span>></span>
<span><</span><span>meta </span><span>http-equiv</span><span>="Content-Type"</span><span> content</span><span>="text/html; charset=gb2312"</span> <span>/></span>
<span><</span><span>head</span><span>></span>
<span><</span><span>title</span><span>></span>SWFUpload<span></</span><span>title</span><span>></span>
<span><</span><span>link </span><span>href</span><span>="css/default.css"</span><span> rel</span><span>="stylesheet"</span><span> type</span><span>="text/css"</span> <span>/></span>
<span><!--</span><span>Swfupload插件begin</span><span>--></span>
<span><</span><span>script </span><span>type</span><span>="text/javascript"</span><span> src</span><span>="swfupload/swfupload.js"</span><span>></</span><span>script</span><span>></span>
<span><</span><span>script </span><span>type</span><span>="text/javascript"</span><span> src</span><span>="js/swfupload.queue.js"</span><span>></</span><span>script</span><span>></span>
<span><</span><span>script </span><span>type</span><span>="text/javascript"</span><span> src</span><span>="js/fileprogress.js"</span><span>></</span><span>script</span><span>></span>
<span><</span><span>script </span><span>type</span><span>="text/javascript"</span><span> src</span><span>="js/handlers.js"</span><span>></</span><span>script</span><span>></span>
<span><!--</span><span>Swfupload插件end</span><span>--></span>
<span><</span><span>script </span><span>type</span><span>="text/javascript"</span><span>></span>
<span>var</span><span> swfu;
window.onload </span><span>=</span> <span>function</span><span>() {
</span><span>var</span><span> settings </span><span>=</span><span> {
flash_url : </span><span>"</span><span>swfupload/swfupload.swf</span><span>"</span><span>,
upload_url: </span><span>"</span><span>upload.php</span><span>"</span><span>, </span><span>//</span><span> 后台文件</span>
<span> post_params: {</span><span>"</span><span>PHPSESSID</span><span>"</span><span> : </span><span>"</span><span><?php echo session_id(); ?></span><span>"</span><span>},
file_size_limit : </span><span>"</span><span>100 MB</span><span>"</span><span>,
file_types : </span><span>"</span><span>*.*</span><span>"</span><span>,
file_types_description : </span><span>"</span><span>All Files</span><span>"</span><span>,
file_upload_limit : </span><span>100</span><span>,
file_queue_limit : </span><span>0</span><span>,
custom_settings : {
progressTarget : </span><span>"</span><span>fsUploadProgress</span><span>"</span><span>,
cancelButtonId : </span><span>"</span><span>btnCancel</span><span>"</span><span>
},
debug: </span><span>false</span><span>,
</span><span>//</span><span> 按钮设置</span>
<span> button_image_url: </span><span>"</span><span>images/TestImageNoText_65x29.png</span><span>"</span><span>, </span><span>//</span><span> Flash样式图片文件</span>
<span> button_width: </span><span>"</span><span>65</span><span>"</span><span>,
button_height: </span><span>"</span><span>29</span><span>"</span><span>,
button_placeholder_id: </span><span>"</span><span>spanButtonPlaceHolder</span><span>"</span><span>,
button_text: </span><span>'</span><span><span class="theFont">浏览</span></span><span>'</span><span>,
button_text_style: </span><span>"</span><span>.theFont { font-size: 16; }</span><span>"</span><span>,
button_text_left_padding: </span><span>12</span><span>,
button_text_top_padding: </span><span>3</span><span>,
</span><span>//</span><span> 句柄设置</span>
<span> 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 </span><span>=</span> <span>new</span><span> SWFUpload(settings);
};
</span><span></</span><span>script</span><span>></span>
<span></</span><span>head</span><span>></span>
<span><</span><span>body</span><span>></span>
<span><</span><span>div </span><span>id</span><span>="header"</span><span>></span>
<span><</span><span>h1 </span><span>id</span><span>="logo"</span><span>><</span><span>a </span><span>href</span><span>="/"</span><span>></span>SWFUpload<span></</span><span>a</span><span>></</span><span>h1</span><span>></span>
<span><</span><span>div </span><span>id</span><span>="version"</span><span>></span>v2.2.0<span></</span><span>div</span><span>></span>
<span></</span><span>div</span><span>></span>
<span><</span><span>div </span><span>id</span><span>="content"</span><span>></span>
<span><</span><span>form </span><span>id</span><span>="form1"</span><span> action</span><span>="index.php"</span><span> method</span><span>="post"</span><span> enctype</span><span>="multipart/form-data"</span><span>></span>
<span><</span><span>p</span><span>></span>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。<span></</span><span>p</span><span>></span>
<span><</span><span>p</span><span>></span>请勿上传包含中文文件名的文件！<span></</span><span>p</span><span>></span>
<span><</span><span>div </span><span>class</span><span>="fieldset flash"</span><span> id</span><span>="fsUploadProgress"</span><span>></span>
<span><</span><span>span </span><span>class</span><span>="legend"</span><span>></span>快速上传<span></</span><span>span</span><span>></span>
<span></</span><span>div</span><span>></span>
<span><</span><span>div </span><span>id</span><span>="divStatus"</span><span>></span>0 个文件已上传<span></</span><span>div</span><span>></span>
<span><</span><span>div</span><span>></span>
<span><</span><span>span </span><span>id</span><span>="spanButtonPlaceHolder"</span><span>></</span><span>span</span><span>></span>
<span><</span><span>input </span><span>id</span><span>="btnCancel"</span><span> type</span><span>="button"</span><span> value</span><span>="取消所有上传"</span><span> onclick</span><span>="swfu.cancelQueue();"</span><span> disabled</span><span>="disabled"</span><span> style</span><span>="margin-left: 2px; font-size: 8pt; height: 29px;"</span> <span>/></span>
<span></</span><span>div</span><span>></span>
<span></</span><span>form</span><span>></span>
<span></</span><span>div</span><span>></span>
<span><</span><span>div </span><span>align</span><span>="center"</span><span>></span>Hanization By <span><</span><span>a </span><span>href</span><span>="http://imll.net"</span><span> target</span><span>="_blank"</span><span>></span>Leo.C,<span></</span><span>a</span><span>></span>
<span></</span><span>div</span><span>></span>
<span></</span><span>body</span><span>></span>
<span></</span><span>html</span><span>></span>
2.后台文件upload.php
<?<span>php
</span>
<span>//</span><span> 传递session值（由于Flash与session不兼容，只能通过参数传递获取）</span>
<span>if</span> (<span>isset</span>(<span>$_POST</span>["PHPSESSID"<span>])) {
</span><span>session_id</span>(<span>$_POST</span>["PHPSESSID"<span>]);
} </span><span>else</span> <span>if</span> (<span>isset</span>(<span>$_GET</span>["PHPSESSID"<span>])) {
</span><span>session_id</span>(<span>$_GET</span>["PHPSESSID"<span>]);
}
</span><span>session_start</span><span>();
</span><span>//</span><span> 设置POST最大值</span>
<span>$POST_MAX_SIZE</span> = <span>ini_get</span>('post_max_size'<span>);
</span><span>$unit</span> = <span>strtoupper</span>(<span>substr</span>(<span>$POST_MAX_SIZE</span>, -1<span>));
</span><span>$multiplier</span> = (<span>$unit</span> == 'M' ? 1048576 : (<span>$unit</span> == 'K' ? 1024 : (<span>$unit</span> == 'G' ? 1073741824 : 1<span>)));
</span><span>if</span> ((int)<span>$_SERVER</span>['CONTENT_LENGTH'] > <span>$multiplier</span>*(int)<span>$POST_MAX_SIZE</span> && <span>$POST_MAX_SIZE</span><span>) {
</span><span>header</span>("HTTP/1.1 500 Internal Server Error"<span>);
</span><span>echo</span> "POST exceeded maximum allowed size."<span>;
</span><span>exit</span>(0<span>);
}
</span><span>//</span><span> 基本设置</span>
<span>$save_path</span> = <span>getcwd</span>() . "/file/"; <span>//</span><span> 文件上传位置</span>
<span>$upload_name</span> = "Filedata"<span>;
</span><span>$max_file_size_in_bytes</span> = 2147483647; <span>//</span><span> 2GB</span>
<span>$extension_whitelist</span> = <span>array</span>("doc", "txt", "jpg", "gif", "png"); <span>//</span><span> 允许文件类型</span>
<span>$valid_chars_regex</span> = '.A-Z0-9_ !@#$%^&()+={}\[\]\',~`-'; <span>//</span><span> 文件名规则
// 其他变量</span>
<span>$MAX_FILENAME_LENGTH</span> = 260<span>;
</span><span>$file_name</span> = ""<span>;
</span><span>$file_extension</span> = ""<span>;
</span><span>$uploadErrors</span> = <span>array</span><span>(
</span>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"<span>
);
</span><span>//</span><span> 检测文件是否上传正确</span>
<span>if</span> (!<span>isset</span>(<span>$_FILES</span>[<span>$upload_name</span><span>])) {
HandleError(</span>"No upload found in \$_FILES for " . <span>$upload_name</span><span>);
</span><span>exit</span>(0<span>);
} </span><span>else</span> <span>if</span> (<span>isset</span>(<span>$_FILES</span>[<span>$upload_name</span>]["error"]) && <span>$_FILES</span>[<span>$upload_name</span>]["error"] != 0<span>) {
HandleError(</span><span>$uploadErrors</span>[<span>$_FILES</span>[<span>$upload_name</span>]["error"<span>]]);
</span><span>exit</span>(0<span>);
} </span><span>else</span> <span>if</span> (!<span>isset</span>(<span>$_FILES</span>[<span>$upload_name</span>]["tmp_name"]) || !@<span>is_uploaded_file</span>(<span>$_FILES</span>[<span>$upload_name</span>]["tmp_name"<span>])) {
HandleError(</span>"Upload failed is_uploaded_file test."<span>);
</span><span>exit</span>(0<span>);
} </span><span>else</span> <span>if</span> (!<span>isset</span>(<span>$_FILES</span>[<span>$upload_name</span>]['name'<span>])) {
HandleError(</span>"File has no name."<span>);
</span><span>exit</span>(0<span>);
}
</span><span>// 检测文件尺寸</span>
<span>$file_size</span> = @<span>filesize</span>(<span>$_FILES</span>[<span>$upload_name</span>]["tmp_name"<span>]);
</span><span>if</span> (!<span>$file_size</span> || <span>$file_size</span> > <span>$max_file_size_in_bytes</span><span>) {
HandleError(</span>"File exceeds the maximum allowed size"<span>);
</span><span>exit</span>(0<span>);
}
</span><span>if</span> (<span>$file_size</span> <= 0<span>) {
HandleError(</span>"File size outside allowed lower bound"<span>);
</span><span>exit</span>(0<span>);
}
</span><span>//</span><span> 检测文件名字为空</span>
<span>$file_name</span> = <span>preg_replace</span>('/[^'.<span>$valid_chars_regex</span>.']|\.+$/i', "", <span>basename</span>(<span>$_FILES</span>[<span>$upload_name</span>]['name'<span>]));
</span><span>if</span> (<span>strlen</span>(<span>$file_name</span>) == 0 || <span>strlen</span>(<span>$file_name</span>) > <span>$MAX_FILENAME_LENGTH</span><span>) {
HandleError(</span>"Invalid file name"<span>);
</span><span>exit</span>(0<span>);
}
</span><span>//</span><span> 检测重名文件</span>
<span>if</span> (<span>file_exists</span>(<span>$save_path</span> . <span>$file_name</span><span>)) {
HandleError(</span>"File with this name already exists"<span>);
</span><span>exit</span>(0<span>);
}
</span><span>//</span><span> 检测后缀名</span>
<span>$path_info</span> = <span>pathinfo</span>(<span>$_FILES</span>[<span>$upload_name</span>]['name'<span>]);
</span><span>$file_extension</span> = <span>$path_info</span>["extension"<span>];
</span><span>$is_valid_extension</span> = <span>false</span><span>;
</span><span>foreach</span> (<span>$extension_whitelist</span> <span>as</span> <span>$extension</span><span>) {
</span><span>if</span> (<span>strcasecmp</span>(<span>$file_extension</span>, <span>$extension</span>) == 0<span>) {
</span><span>$is_valid_extension</span> = <span>true</span><span>;
</span><span>break</span><span>;
}
}
</span><span>if</span> (!<span>$is_valid_extension</span><span>) {
HandleError(</span>"Invalid file extension"<span>);
</span><span>exit</span>(0<span>);
}</span>
<span>//</span><span> 保存文件</span>
<span>if</span> (!@<span>move_uploaded_file</span>(<span>$_FILES</span>[<span>$upload_name</span>]["tmp_name"], <span>$save_path</span>.<span>$file_name</span><span>)) {
HandleError(</span>"文件无法保存."<span>);
</span><span>exit</span>(0<span>);
}
</span><span>//</span><span> 成功输出</span>
<span>echo</span> "File Received"<span>;
</span><span>exit</span>(0<span>);<br /></span>
<span>function</span> HandleError(<span>$message</span><span>) {
</span><span>header</span>("HTTP/1.1 500 Internal Server Error"<span>);
</span><span>echo</span> <span>$message</span><span>;
}
</span>?>
