Jqueryajaxpost is submitted to the controller of ThinkPHP, but $ _ POST cannot be obtained. what should I do?-php Tutorial

Jqueryajaxpost is submitted to the controller of ThinkPHP, but $ _ POST cannot be obtained. how should I write it? the front-end js is like this?

                                var uid = '10002';                var a = 'get_users';                jQuery.ajax({                    url: "http://localhost:8099/thinkphp111/index.php?s=/Index/index.html",                    type: "POST",                    data: { uid: uid, a: a },                    success: function (jsonResult) {                        alert(jsonResult);                    },                    error: function (e) {                        alert(e);                    }                }); 

Php is like this.

 aa();}        

However, the result returned after execution is null. Normally, 'get _ users' is returned '. Why?

Reply to discussion (solution)

Index. php? S =/Index/index.html
Why? How do I write a route?
Are you sure the index method is executed?

I'm sure the method has been executed.
Because on the php side, if I assign a value to $ _ POST ['A'] directly, for example, $ _ POST ['A'] = 'getusers'
Then I will execute that js in html. Now alert comes out to getusers. The command is executed. Only PHP cannot obtain the post value.
I have not set a route.

You mean
Namespace Home \ Controller;
Use Think \ Controller;
$ _ POST ['A'] = 'getusers ';
Class IndexController extends HomeController {

Public function aa ()
{
$ Output = array ();
$ A = $ _ POST ['A']? $ _ POST ['A']: '';

Echo $;
}

Public function index (){
$ This-> aa ();
}
Then, the address bar of the browser is http: // localhost: 8099/thinkphp111/index. php? S =/Index/index.html
Is this executed?

Just pull the image.

In THinkPHP, do not use parameter names such as a, m, and g for parameters passed by ajax. this is the default TP acquisition method, controller, and group, you can replace a with another one.

Wow, thank you very much for a583049958. All at once, it was successfully pulled. This is indeed a problem.