PHP利用APC模块实现大文件上传进度条的方法_PHP
php 大文件带进度的上传,一直是一个令php程序员很苦恼的问题。查询baidu 、Google ,大体做带进度的上传方式为:flash+php,socket,apc+php等,下面我介绍了apc +php+ajax制作的带进度的上传,并贴出源码,希望对大家有用。
Alternative PHP Cache(APC)是 PHP 的一个免费公开的优化代码缓存。它用来提供免费,公开并且强健的架构来缓存和优化 PHP 的中间代码。
在使用apc时候,先必须使用安装apc 模块。
第一步:下载php_apc.dll
第二步:让php.ini支持apc扩展模块。
将php_apc.dll放入你的ext目录,然后打开php.ini 加入:
extension=php_apc.dll
apc.rfc1867 = on
apc.max_file_size = 100M
upload_max_filesize = 100M
post_max_size = 100M
//以上参数可自己定义
第三步:检查是否支持PHP APC
if (function_exists('apc_fetch')) { echo 'it surpport apc model!'; } else { echo "it's not support apc model!"; } ?>
下面进入正题:
原理:通过APC 模块,用ajas从缓存中读取上传的进度。详见:
index.php
<?php $unid=uniqid("");//确定唯一标致,实现多人同时上传 ?> <div class="userinput2"> <div id="captions">先将你要上传的软件上传服务器,上传时请耐心等候...<span class="style1"><br /> </span> <script type="text/javascript" > var xmlHttp; var proNum=0; var loop=0; //初始化xmlHttp function createxml(){ var xmlHttp; if(window.XMLHttpRequest){ xmlHttp=new XMLHttpRequest(); }else{ xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); } return xmlHttp; } xmlHttp=createxml(); //ajas操作 function sendURL() { var url="getprogress.php?progress_key=<?php echo $unid;?>"; xmlHttp.open("GET",url,false); if (window.navigator.userAgent.indexOf("Firefox")>=1){ //如果是firefox3.0 xmlHttp.send("progress_key=<?php echo $unid;?>"); if(xmlHttp.status==200) doHttpReadyStateChange(); }else{ xmlHttp.onreadystatechange = doHttpReadyStateChange; xmlHttp.send("progress_key=<?php echo $unid;?>"); } } //回调函数 function doHttpReadyStateChange() { if (xmlHttp.readyState== 4){ proNum=parseInt(xmlHttp.responseText); //alert(proNum); document.getElementByIdx_x("progressinner").style.width = proNum+"%"; document.getElementByIdx_x("showNum").innerHTML = proNum+"%"; if ( proNum < 100){ setTimeout("sendURL()", 200); }else{ //上传成功后,还不能及时得到信息。还希望高人指点 document.getElementByIdx_x("progressouter").style.display="none"; document.getElementByIdx_x("progressinner").style.display="none"; document.getElementByIdx_x("showNum").style.display="none"; document.getElementByIdx_x("theframe").style.display="none"; document.getElementByIdx_x("link2").style.display="block"; } } } function startProgress(){ document.getElementByIdx_x("progressouter").style.display="block"; setTimeout("sendURL()", 200); } function newsofturl(text){ document.getElementByIdx_x("link2").style.display="block"; document.getElementByIdx_x("link2").value=text; } </script> <iframe id="theframe" name="theframe" src="softupload.php?id=<?php echo($unid); ?>" style="border: 0; height: 80px; width: 400px; " frameborder="0" scrolling="no" > </iframe> <input name="linkdefult" type="hidden" id="linkdefult" value="0" /> <br /> <div id="link2" style="display:none;" > <font size=2>上传成功! 文件大小为: <input type="text" name="filesize" id="filesize" style="width:50px;"/> </font><br> <br> <font size=2>文件下载地址为:</font><br /> <input type=text name='link' id='link' style='width:380px;' /> </div> <br/> <div id="progressouter" style="width: 500px; height: 20px; border: 1px solid #000000; display:none;"> <div id="progressinner" style="position: relative; height: 20px; background-color: #333333; width: 0%; "></div> </div> <div id='showNum' style="font-size:12px; color:#333333"></div> </div> </div>
softupload.php
<?php $id = $_GET['id']; ?> <script language="javascript"> //Trim the input text function Trim(input) { var lre = /^\s*/; var rre = /\s*$/; input = input.replace(lre, ""); input = input.replace(rre, ""); return input; } function CheckForTestFile() { var file = document.getElementByIdx_x('Softfile'); var fileName=file.value; //Checking for file browsed or not if (Trim(fileName) =='' ) { alert("请为上传选择一个文件!!!"); file.focus(); return false; } //Setting the extension array for diff. type of text files var extArray = new Array(".rar", ".zip", ".exe", ".gz"); //getting the file name while (fileName.indexOf("\") != -1) fileName = fileName.slice(fileName.indexOf("\") + 1); //Getting the file extension var ext = fileName.slice(fileName.indexOf(".")).toLowerCase(); for (var i = 0; i < extArray.length; i++) { if (extArray[i] == ext) { window.parent.startProgress(); return true; } } alert("正确的文件格式为" + (extArray.join(" ")) + "\n请选择一个新的 " + "文件提交上传."); file.focus(); return false; } </script> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <form enctype="multipart/form-data" id="upload_form" action="target.php" method="POST"> <input type="hidden" name="APC_UPLOAD_PROGRESS" id="progress_key" value="<?php echo $id?>"/> <table width="322" border="0" cellpadding="0" cellspacing="0" id="linkTable"> <tr> <td >1.选择软件<br /> <input name="Softfile" type="file" id="Softfile" /></td> <td ><br /> <input name="submit" type="submit" onclick="return CheckForTestFile();" value="上传软件"/></td> </tr> </table> </form>
target.php
<script language="javascript"> //将上传后的信息返还给父窗口 function chuanzhi(){ parent.document.getElementByIdx_x('filesize').value=document.getElementByIdx_x('size').value; parent.document.getElementByIdx_x('link').value=document.getElementByIdx_x('newsoftdir').value; parent.document.getElementByIdx_x('linkdefult').value=1; } </script> <body > <?php //header('Content-Type:text/html;charset=gb2312'); define('SOFTDIR', "./upload/"); //上传后路径 define('HTTPSOFTDIR', "http://www.mysite.com/"); //服务器的路径 //判断上传软件后缀名是否允许 function isSoftExt($extension) { $ext = array('exe', 'rar', 'zip','gz'); return in_array($extension, $ext) ? true : false; } if($_SERVER['REQUEST_METHOD']=='POST'){ $errors['0'] = true; $errors['1'] = '请选择上传的软件图片'; $errors['2'] = '上传软件图片失败'; $errors['3'] = '上传软件图片失败'; $daytime = date('Y-m-d-h-m-s'); $timename=str_replace("-","",$daytime); //取得当天的日期时间 //检查软件是否是正常上传的 if(!is_uploaded_file($_FILES['Softfile']['tmp_name'])) { echo "<script>alert('非正常上传!');history.back();</script>"; exit; } $extension = pathinfo($_FILES['Softfile']['name'], PATHINFO_EXTENSION); $filename = $timename."_".$_FILES['Softfile']['name']; $tmpsize=$_FILES['Softfile']['size']; $msize=round($tmpsize/1048576 , 2) ."M"; $ksize=round($tmpsize/1024 ,2). "K"; $filesize =$tmpsize>1048576?$msize:$ksize; //检查软件文件格式 if(!isSoftExt($extension)) { echo "<script>alert('上传的软件格式有错误!');history.back();</script>"; exit; } //移动软件 if(!move_uploaded_file($_FILES['Softfile']['tmp_name'], SOFTDIR. $filename)) { echo "<script>alert('移动软件出错!');history.back();</script>"; exit; }else{ echo "<font size=2>上传成功! 文件大小为:<input type=text id='size' value='$filesize'></font><br>"; echo "<font size=2>文件下载地址为:</font><input type=text id='newsoftdir' value='".HTTPSOFTDIR.$filename."' style='width=380'>"; } }else echo "请不要直接输入地址!"; ?>
getprogress.php
<?php //上传ajas获取进度页面 session_start(); if(isset($_GET['progress_key'])) { $status = apc_fetch('upload_'.$_GET['progress_key']); echo ($status['current']/$status['total'])*100; } echo 'APC_FILE='.APC_FILE; ?>
本文为大家提供了一个php制作带进度上传文件的思路,可能还有一些欠缺的地方,希望大家进行补充,或者是再结合小编之前整理的文章进行学习,希望对大家的学习有所帮助。

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