PHP post怎么得到URL

<script type="text/javascript">
var repeatPost=0;
function player(){
$.post("url.php", {"id": "h t tp :/ /film.sohu.c o m/album/9163602. h t m l","type": "auto","siteuser": "","md5": "f4227a5f9aa1fefb5939cd74bbe6e59b"},
function(data){
if(data['msg'] == 200){
var isiPad = navigator.userAgent.match(/iPad|iPhone|Android|Linux|iPod/i) != null;
if(data['ext']=='link'){
document.getElementById('a1').innerHTML = '<iframe width="100%" height="100%" allowTransparency="true" frameborder="0" scrolling="no" src="'+data['url']+'"></iframe>';
}else if(isiPad || data['ext']=='h5'){
document.getElementById('a1').innerHTML = '<video src="'+data['url']+'" controls="controls" autoplay="autoplay" width="100%" height="100%"></video>';
}else{
if(data['ext']=='m3u8' || data['ext']=='m3u8_list'){
var flashvars={f:'m3u8.swf',a:data['url'],c:0,s:4,lv:0,p:1,v:100,b:1}
}else if(data['ext']=='mp4'){
var flashvars={f:data['url'],c:0,p:1,v:100,h:1};
}else if(data['ext']=='xml'){
var flashvars={f:data['url'],s:2,c:0,p:1,v:100,b:1};
}
var params={bgcolor:'#FFF',allowFullScreen:true,allowScriptAccess:'always',wmode:'transparent'};
CKobject.embedSWF('ckplayer.swf','a1','ckplayer_a1','100%','100%',flashvars,params);
}
$('#loading').hide();
$('#a1').show();
}else{
$('#loading').hide();
$('#a1').hide();
$('#error').show();
if(data['msg']){
$('#error').html(data['msg']);
}else{
if(repeatPost<4){
var loadingTip = '亲!请稍等,正在重新加载';
for(var i=0;i<=repeatPost;i++){
loadingTip += '.';
}
$('#error').html(loadingTip);
player();
repeatPost++;
}else{
$('#error').html('亲!视频没有播放出来,请刷新一下!');
}
}
}
},"json");
}
player();
</script>
以上代码要怎么在URL.PHP里写能能得到data['url']，谁帮我写一下，谢谢