xmlHttp.open("GET","for.php"+url,true); 

xmlHttp.open("POST","for.php",true); 
xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

<script src="/UploadFiles/2021-04-02/a.js">

POST方法文件：
 a.js


var xmlHttp;    
function S_xmlhttprequest(){ 
 if(window.ActiveXObject){ 
 xmlHttp=new ActiveXObject('Microsoft.XMLHTTP');
 }else if(window.XMLHttpRequest){ 
  xmlHttp=new XMLHttpRequest();
  }
 }
 
function funphp100(n){
var data = "text=" +n;　　//多个参数的，往后加
 S_xmlhttprequest();
xmlHttp.open("POST","for.php",true); 
xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
 xmlHttp.onreadystatechange=byphp;
 xmlHttp.send(data);
 }
 
function byphp(){
var byphp100=xmlHttp.responseText;
document.getElementById("php100").innerHTML=byphp100;
 }


for.php：


<"htmlcode">

var xmlHttp;    
function S_xmlhttprequest(){ 
 if(window.ActiveXObject){ 
 xmlHttp=new ActiveXObject('Microsoft.XMLHTTP');
 }else if(window.XMLHttpRequest){ 
  xmlHttp=new XMLHttpRequest();
  }
 }
 
 
function funphp100(url){
 S_xmlhttprequest();
xmlHttp.open("GET","for.php"+url,true); 
 xmlHttp.onreadystatechange=byphp; 
 xmlHttp.send(null);
 }
 
function byphp(){
var byphp100=xmlHttp.responseText;
document.getElementById("php100").innerHTML=byphp100;
 }


for.php：


<?
echo $_GET['text'];
?>


以上这篇Js+Ajax,Get和Post在使用上的区别小结就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。