AJAX - 根据PHP脚本的回复更改内容

Scenario I have a page where users can activate or deactivate the service. I have got a button where it says the current state of the service. I achieve this by getting service state via php and echoing active or inactive at the place of the button text.
Problem I want a AJAX to listen for click on the button. When a user clicks on the active button the AJAX should call a url which triggers change of the users' service state change and returns the current state of the user. I want to change the text in the button to active if the reply was 200 and inactive if the reply from the php was 101.

I want to compare the result in a if-elseif-else style statement like

    if(reply=='200')
       code-to-change-the-text-to-active;
    elseif(reply=='101')
       code-to-change-the-text-to-in;
    else
       alert(some-error);

I made several searches and only found how to change the text with the text from the reply. But, I want a way to fetch the reply as variable and use it to switch my text.

You need to send your reply from PHP to JavaScript as JSON (using json_encode($reply)), then, your AJAX success callback function will receive the state value in a format it can use.

Use the following code format with your actual data:

HTML

<input type="button" value="active" id="active">  

JS

$('#active').click(function () {  
       var status = $(this).attr('value'); // get the value of your button state
       var r = confirm("Are You Sure Change Status?");
       if (r==true){
          $.ajax({
             type: "POST",
             url: "YOUR URL",
             data:"{userstatus:status}",
             beforeSend : function () {

             },
             success:function(result){
                 //Do whatever you want with result//
             }
          });
       }else{
          return false;
       }
    });  

Note: when you click on the active button its call ajax function and put your actual url file name in url param. then run the sql query there and you will get response in success as result.

shortcut/ fast.

JS

function updateStatus(){

$.get('yourPHPCode/getStatus', function(data) ){
    $('#status').val(data);
}

}

PHP

function getStatus(){ ... echo $status; }