php中怎么接收Ajax POST数据

php中如何接收Ajax POST数据

<div class="dialog-comment-list-box">
<div class="loading-img"><table><tr><td><img src="tpl/default/img/loading.gif" alt="loading"><p>正在加载联系人</p></td></tr></table></div>
<ul class="dialog-comment-list">
<!-- <li class="dialog-comment-list-item">what's going on?</li>
<li class="dialog-comment-list-item reply">what's going on?</li>
<li class="dialog-comment-list-item">what's this?</li>
<li class="dialog-comment-list-item">what's this?</li>
<li class="dialog-comment-list-item reply">???</li>
<li class="dialog-comment-list-item"><img src="http://pic.yupoo.com/huang-yu/DFR1RRtM/small.jpg" alt="pic"></li> -->
</ul><!-- /.dialog-comment-list -->
</div>
<div class="dialog-comment-edit">
<textarea name="" id="edit"></textarea>
</div><!-- /.dialog-comment-edit -->
<div class="site-im-dialog-footer">
<div class="for-post" data-toggle="popover" data-content="<small>写点什么再发吧！</small>">
<kbd><kbd>Ctrl</kbd>+<kbd>Enter</kbd></kbd>
<button class="btn btn-success btn-sm" id="post-reply"><i class="fa fa-paper-plane"></i> 发送</button>
</div>

</div><!-- /.site-im-dialog-footer -->
</div>

/**
 * 发送信息/获取信息
 */
// 清除定时器
function clearChatTimers(id){
	if(id){
		//请除指定用户定时执行
	    if(aPChatTimers[id]){
	    	clearTimeout(aPChatTimers[id]);
	    	loadFlag = false;
//	    	console.log('clear:'+aPChatTimers[id]);
		}
	}else{
		//请除所有用户定时执行
		for (var i=0;i<aPChatTimers.length;i++){
			if(aPChatTimers[i]){
				loadFlag = false;
		    	clearTimeout(aPChatTimers[i]);
//		    	console.log('clear:'+aPChatTimers[i]);
			}
		}
	}

	
};
/*

uid	


*/


/**
 * 返回接收者Id
 * @returns
 */
function getRecipientIdFromReplyBtn(){
	var uid = $.trim($("#post-reply").attr('data-send-uid'));
	if(uid == undefined||uid ==''){
		uid = false;
	}
	return uid;
}
/**
 * 清空发送的文本内容
 * @returns
 */
function clearInputMessage(){
	$("#edit").val('');
	$("#post-reply").focus();
}

/**
 * 获取发送的文本内容
 * @returns
 */
function getInputMessage(){
	var  sMsg = $.trim($("#edit").val());
	if(sMsg == undefined||sMsg ==''){
		sMsg = false;
	}
	return sMsg;
}

//发送信息
 function sendPrivateMessages(){
	 var uid,message;
		 uid = getRecipientIdFromReplyBtn();
		 message 	= getInputMessage();
	 
	 if(message === false){
	 	$('.for-post').popover('show');
		$("#edit").focus(function() {
			$('.for-post').popover('hide');
		});
		 return false;
	 }
	 
 	 $("#post-reply").attr('disabled','disabled');
	 clearChatTimers(0);

        //index.php?do=webim&action=send_messages    POST
	 
   	 $.post('index.php?do=webim',{action:'send_messages',uid:uid,sMessage:message}, function(json) {
   		 if(json.status == '1'){
   		 	if($('.dialog-comment-list').find('li').length >0){
   		 		var _scrollHeight = $('.dialog-comment-list').find('li').last().offset().top;
   		 		$("#post-reply").closest('.site-im-dialog').find('.dialog-comment-list').animate({zoom:1},function(){
		    		$(".dialog-comment-list-box").data('jsp').scrollTo(0, _scrollHeight);
		    	});
   		 	}

    		 $("#post-reply").removeAttr('disabled');
    		 clearInputMessage();
    		 clearChatTimers(0);
 		     getPrivateMessages(uid);
   		 }else{
   			 tipsOp(json.msg,'error');
   			 $("#post-reply").removeAttr('disabled');
   		 }
   		 	
     },'json');
}

返回    {"msg":"\u53d1\u9001\u6210\u529f","status":"1","data":[]}

单击发送或 Ctrl+Enter 按钮不抬起 （如图）







如何才能单击发送按钮或者按CTRL+ENTER    把数据POST到php处理 求PHP代码





------解决思路----------------------
执行 $.post('index.php?do=webim',{action:'send_messages',uid:uid,sMessage:message} ... 后
php 得到
$_GET['do'] 为 webim
$_POST['action'] 为 send_messages
$_POST['uid'] 为 uid 的值
$_POST['sMessage'] 为 message 的值