Hi as you can see I'm trying to send my data to admin-ajax.php using ajax post call kindly check the code below and the template that I use is betheme.
index.html
$('#send-form').on('submit', function () { $.ajax({ url : '<?php echo admin_url('admin-ajax.php'); ?>', data : { 'action' : 'test_func', 'data':'lorem ipsum' }, type : 'POST', contentType: "application/json; charset=utf-8", dataType : 'json', success : function (callback) { console.log(callback); } }); return false; }); functions.php
function test_func () { echo json_encode(array('res'=>'return dummy text')); } add_action('wp_ajax_nopriv_test_func', 'test_func'); 1 Answer
As per the code of ajax no need of adding contentType: "application/json; charset=utf-8 because you are passing data as string, so contentType property is not required.
To fix the issue of getting 0 every time you just have to add wp_die() at the end of test_func method.
Here you edited code
1) jQuery Ajax Code:
jQuery('#send-form').on('submit', function () { $.ajax({ url : '<?php echo admin_url('admin-ajax.php'); ?>', data : { 'action' : 'test_func', 'data':'lorem ipsum' }, type : 'POST', // contentType: "application/json; charset=utf-8", dataType : 'json', success : function (callback) { console.log(callback); } }); return false; }); 2) Code of functions.php
function test_func () { echo json_encode(array('res'=>'return dummy text')); wp_die(); } add_action('wp_ajax_nopriv_test_func', 'test_func'); // ajax call for non-login user. add_action('wp_ajax_test_func', 'test_func'); // ajax call for login user. 
