通过URL传递参数到php，但php没有得到它，为什么？

Question

I create the table and use ajax to pass data.

This is my ajax part, I put the parameter in URL, but php code doesn't read it.

$.ajax({
        type:"POST",
        url:"system_setting.php?p=add",
        data:"username="+username+"&password="+password+"&nickname="+nickname+"&authority="+authority,
        success:function(data){
            viewData();
        }
    });

I use $page=isset($_GET['p'])?$_GET['p']:''; to judgment parameter, but it doesn't read. Please teach me how should I do, thank you.

Answer 1

Use POST instead and add p=add in data instead url

$.ajax({
    type:"POST",
    url:"system_setting.php",
    data:"p=add&username="+username+"&password="+password+"&nickname="+nickname+"&authority="+authority,
    success:function(data){
        viewData();
    }
});

And in php

$page=isset($_POST['p'])?$_POST['p']:'';