PHP5.2升级PHP5.3的有关问题

PHP5.2升级PHP5.3的问题
我以前的环境是PHP5.2.8是IIS以ISAPI的方式挂载的，现在我更换成了PHP5.3.14是IIS+FastCGI方式挂载的，结果就悲剧了以前下面这段程序是可以运行的，但是现在就无法运行了
function kc_f_singleupload($id,$path,$filetype=0,$count=1,$width=1000,$height=1000){
global $king;
$s.="";
$s.=kc_icon('a9',$king->lang->get('system/common/singleupload')).$king->lang->get('system/common/singleupload');
$s.="";
$s.=" 剪裁";
$s.='
<script><br />var uploaddialog=$.artdialog({title:false,content:"图片上传中，请稍候...",show:false});<br />var uploader = new plupload.Uploader({<br />runtimes : "flash",<br />browse_button : "pickfiles",<br />container: "pickfiles",<br />max_file_size : "20mb",<br />max_file_count: '.$count.',<br />rename: true,<br /> unique_names: true,<br />url : "/system/manage.php?action=iframe&CMD=plupload&filetype=0&is=1&&KingCMS_Admin='.$_COOKIE['KingCMS_Admin'].'",<br />resize : {width : 1920, height : 1080, quality : 90},<br />flash_swf_url: "../ui/plupload/plupload.flash.swf",<br />filters : [{title : "图片文件", extensions : "jpg,gif,png"}],<br />init: {<br />FileUploaded: function (up, file, info) { <br />uploaddialog.hide();<br />info.response=eval("(" + info.response + ")");<br />$("#'.$id.'").val(info.response.result);<br />up.stop();<br /> },<br /> BeforeUpload:function(){<br />uploaddialog.show();<br /> },<br /> FilesAdded:function(up, files) {<br /> uploader.start();<br /> }<br /> }<br />});<br />uploader.init();<br /></script>';
return $s;
}

提示$s.="";出错，请各位帮忙看看是怎么回事，谢谢啦……

------解决方案--------------------
跟php加载方式有关系吗？  我感觉应该是跟php的配置有关系吧，你吧原来的php配置文件还原到现在的看看