使用php+apc实现上传进度条且在IE7下不显示的问题解决方法_PHP
IE7
今天整理以前写过的关于上传文件，并显示进度条的程序代码，对该代码进行优化整理。解决了一直困扰的问题：有时进度条没有达到100%，浏览器出现假死现象。在IE8、chrome测试非常完美。
项目需求：
上传APK，显示上传进度条，上传完成开始分析APK，并显示：正在分析apk数据，请稍后... ，分析完成后，显示：上传成功，重新上传
由于我电脑装的是winxp英文版，IE默认的是IE7，在测试的时候发现进度条不显示。百分比也不显示。
排除问题：
1、将DOM改成jquery方式，不显示
2、给递归调用加上延时，不显示。加上延时代码：setTimeout("getProgress('"+upid+"')",500);
3、是否是容器层次问题导致？于是测试是否执行上传期间模块。在页面中随便加个容器，写个全局变量i，在上传期间调用的模块中写入到该容器i++，显示，说明正确调用
4、即然显示，进度条和百分比都为0，是不是接收的json数据有问题？
由于我返回的代码为：echo json_encode($arr); 本身就为json数据，但为了找出原因，将返回的数据在执行一次：var dataObj=eval("("+data+")");//转换为json对象
显示脚本错误。
5、难道是缓存？于是将
复制代码 代码如下:
$.getJSON("ProcessBar.php",{progress_key:upid},function(result){
改为：
复制代码 代码如下:
$.getJSON("ProcessBar.php",{progress_key:upid,time:(new Date()).getTime()},function(result){
完美解决问题。 
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