js部分
b.js
if(window.XMLHttpRequest){
xhr=new XMLHttpRequest();
}else{
xhr=new ActiveXObject("Microsoft.XMLHTTp");
}
var arr=Array();
arr.push("a");
arr.push("b");
arr.push("c");
arr=JSON.stringify(arr);//非常重要
xhr.open("post","a.php",true);
xhr.onreadystatechange=function(){
if(xhr.readyState==4 && xhr.statues==200){
~~~~~~~~~~~~~~~~~~~~~~
}
}
xhr.setRequestHeader("content-type","application/json;charset=utf-8");//非常重要
xhr.send(arr);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.php
\\\\\\
<?php
$json=file_get_content("php://input");
$arr=json_decode($json);
$arr是数组，自己看着办
END!
原文：https://www.cnblogs.com/robot-s/p/9747353.html