varuinfo={};varuname=document.getElementById('uname');varupwd=document.getElementById('upwd');uinfo['uname']=uname.value;uinfo['upwd']=upwd.value;varusent=JSON.stringify(uinfo);varxhr=null;if(window.XMLHttpRequest){xhr=newXMLHttpRequest();}else{xhr=ActiveXObject('Microsoft.XMLHttp');}xhr.open("POST","/controler/login.php",true);//etcxhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded");xhr.send(usent);然后php端怎么接受js發(fā)送的數(shù)據(jù)呢？$_POST['']拿不到數(shù)據(jù)，這部分的格式具體是要指定呢，求大神指導(dǎo)下~~多謝~！