How to switch called php page using AJAX in wordpress - php

Question

I have an several online application forms built into a (they differ per country) and I need to switch from one to the other with a users button click.
The code I have does this however it also produces a 500 error which breaks any other scripts.
Can anyone give me an idea of what I am doing wrong?
//Update appURL
if (jQuery('button[id="ukApp"]').hasClass( "checked" )) {
appURL = "wp-content/plugins/GoMarkets_application/uk/uk-application.php";
} else if (jQuery('button[id="itlApp"]').hasClass( "checked" )) {
appURL = "wp-content/plugins/GoMarkets_application/itl/it-application.php";
}
//Get URL path
function getContextPath() {
var ctx = window.location.pathname,
path = '/' !== ctx ? ctx.substring(0, ctx.indexOf('/', 1) + 1) : ctx;
return path + (/\/$/.test(path) ? '' : '/');
}
//Country Application URL
function getOutput() {
jQuery.ajax({
url: getContextPath() + appURL,
complete: function (response) {
jQuery('#output').html(response.responseText);
},
error: function () {
jQuery('#output').html('Bummer: there was an error!');
}
});
return false;
}

Answer 1

here is your ajax function
$.ajax({
url: ajax.url,
...
dataType: "json",
success: function(response) {
$('#myDiv').html(response.html);
},
})
and the php function
function my_ajax_load() {
$post_id = $_POST['post_id'];
ob_start();
include(locate_template('my-template-file.php',false,false));
$page_template = ob_get_contents();
ob_end_clean();
$response['html'] = $page_template;
wp_send_json($response);
}
in your template file you can use your variables declared in the function, in this example you can you $post_id inside the my-template-file.php
For example:
<?php /* Template name: My template */
if($post_id) {
echo get_the_title($post_id);
}
?>
500 error is caused by php error not ajax or jquery, check out your template file for a php errors

Answer 2

There was a missing image being called by the page I was trying to load, the error only showed up in the logs. Thanks all :)