php学习笔记（三十一）自定义ajax对象，简化ajax应用

ajax.js

function Ajax(recvType){
	var ajax = new Object();
	//判断是html还是xml
	ajax.recvType = recvType?recvType.toUpperCase():"HTML";
	ajax.targetUrl = '';
	ajax.sendString = '';
	ajax.resultHandle = '';
	
	ajax.createXMLHTTPRequest = function(){
	    var request = false;
	    //一般先判断非IE浏览器
	    //window对象中有XMLHttpRequest存在就是非IE，包括（IE7，IE8）
	    if(window.XMLHttpRequest){
	        request=new XMLHttpRequest();//非IE以及IE7，IE8浏览器
	        if(request.overrideMimeType){
	            request.overrideMimeType("text/xml");//重置mime类型
	        }
	    //window对象中有ActiveXObject属性存在就是IE浏览器的低版本
	    }else if(window.ActiveXObject){
	        var versions=['Microsoft.XMLHTTP', 'MSXML.XMLHTTP', 'Msxml2.XMLHTTP.7.0','Msxml2.XMLHTTP.6.0','Msxml2.XMLHTTP.5.0', 'Msxml2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];//各种IE浏览器创建Ajax对象时传递的参数
	        for(var i=0; i<versions.length; i++){
	            try{
	                request=new ActiveXObject(versions[i]);//各个IE浏览器版本的参数不同
	                if(request){
	                    return request;
	                }
	            }catch(e){
	                request=false;
	            }
	        }
	    }
	    return request;
	};
	
	ajax.XMLHttpRequest = ajax.createXMLHTTPRequest();
	ajax.processHandle = function(){
		if (ajax.XMLHttpRequest.readyState==4) {
			if (ajax.XMLHttpRequest.status==200) {
				if (ajax.recvType=="HTML") {
					ajax.resultHandle(ajax.XMLHttpRequest.responseText);
				}else if(ajax.recvType=="XML") {
					ajax.resultHandle(ajax.XMLHttpRequest.responseXML);
				}
			}
		}
	};
	
	ajax.get = function(targetUrl,resultHandle){
		ajax.targetUrl = targetUrl;
		if (resultHandle!=null) {
			ajax.XMLHttpRequest.onreadystatechange = ajax.processHandle;
			ajax.resultHandle = resultHandle;
		}
		if (window.XMLHttpRequest) {
			ajax.XMLHttpRequest.open("get",ajax.targetUrl);
			ajax.XMLHttpRequest.send(null);
		}else{
			ajax.XMLHttpRequest.open("get",ajax.targetUrl,true);
			ajax.XMLHttpRequest.send();
		}
	};
	ajax.post = function(targetUrl,sendString,resultHandle){
		ajax.targetUrl = targetUrl;
		if (typeof(sendString)=="object") {
			var str = "";
			for (var pro in sendString) {
				str+=pro+"="+sendString[pro]+"&";
			}
			ajax.sendString=str.substring(0, str.length-1);
		}else{
			ajax.sendString=sendString;
		}
		if (resultHandle!=null) {
			ajax.XMLHttpRequest.onreadystatechange = ajax.processHandle;
			ajax.resultHandle = resultHandle;
		}
		ajax.XMLHttpRequest.open("post",ajax.targetUrl,true);
		ajax.XMLHttpRequest.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
		ajax.XMLHttpRequest.send(ajax.sendString);
	};
	
	return ajax;
}

ajaxObj.php

<?php
/**
 * 自定义ajax对象，简化ajax应用
 * 
 * var arr = ["aa","bb","cc","dd"];
 * var obj = {name:"sa",age:10,sex:"man"};
 * alert(obj.name);
 */
?>
<script src="ajax.js"></script>
<script>
var ajax = Ajax();
//ajax.get("serverget.php?username=zhangsan&email=[e-mail]×tamp="+Math.random(),function(data){
//	alert(data);});
//ajax.post("serverpost.php","username=list&email=[e-mail]×tamp="+Math.random(),function(data){
//	alert(data);});
ajax.post("serverpost.php",{username:"sans",email:"sdfjksdl@173"},function(data){
	alert(data);});
</script>

get

<?php
	$str = "{$_GET["username"]}---{$_GET["email"]}---\n";
//	$file = fopen("saveget.txt", "a");
//	fwrite($file, $str);
//	$file.close();
	echo $str;
?>

post

<?php
	//用来解决中文乱码问题
//	header("Content-Type:text/html;charset=utf-8");

	$str = "{$_POST["username"]}---{$_POST["email"]}---\n";
//	$file = fopen("savepost.txt", "a");
//	fwrite($file, $str);
//	$file.close();
	//多个字符串会当成一个字符串来处理
//	echo $str."我的啊";
//	echo $str."******";
	//所以可以写入一个数组中
//	$arr = array("one"=>1,"two"=>2,"three"=>3);
	//转换成json
//	$json = json_encode($arr);
//	echo $json;
	
	
	echo $str;
?>