<script src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>

<script>

let loopTimes=20;

for (i = 0; i < loopTimes; i++) {

    //console.log(i);

$.post("http://redis.wlphp.com/frequency_api.php",{},function (data){

console.log(data);

});

}

</script>

php接口取消跨域限制：

header("Access-Control-Allow-Origin:*");

header('Access-Control-Allow-Methods:*');