在页面加载后使用Ajax调用php代码

Question

I got some php code that i want to execute when the page is fully loaded and i only want it to execute one time and no more after clicking submit.

this is the php code i want to execute

$backup=fopen("backup/".time().".json", "w");
    fwrite($backup, json_encode($list)); fclose($backup);

can someone tell me how to execute this code after page is loaded and only 1 time. If possible.

Answer 1

//wait for the DOM to be loaded
$(document).ready(function(){
    var $button = $('#idOfYourButton');
    $button.on('click', function(e){
    //if we have a submit button we probably do not want it to send the data via post/get
    e.preventDefault();
    $.ajax({
          url: "/your/path/file.php",
          success: function(){
              //do something when script was called 
          }
        });
    });
});  

For the script to only run once, you have to define what this means. Once per session? Set a session flag on your server. Once per refresh? You can simply use a javascript variable.