SWFUpload 플러그인을 사용하여 파일 업로드

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>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>html </span><span>xmlns</span><span>="http://www.w3.org/1999/xhtml"</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>head</span><span>></span><span><span>title</span><span>></span>SWFUpload<span></span><span>title</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>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>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>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>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>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>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>body</span><span>></span><span><span>div </span><span>id</span><span>="header"</span><span>></span><span><span>h1 </span><span>id</span><span>="logo"</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>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>div </span><span>id</span><span>="content"</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>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>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>div </span><span>class</span><span>="fieldset flash"</span><span> id</span><span>="fsUploadProgress"</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>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>div</span><span>></span><span><span>span </span><span>id</span><span>="spanButtonPlaceHolder"</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>div </span><span>align</span><span>="center"</span><span>></span>Hanization By <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></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></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> ) {
        HandleError("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>?>

以上就介绍了使用SWFUpload插件上传文件，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。