jquery - AJAX call I receive the “/wp-admin/admin-ajax.php 400 (Bad Request)” error

one text

Solution:

First, change

var jaxscript

to

var ajaxscript

var test = '667'
var ajaxscript = 'http://testing.local/wp-admin/admin-ajax.php'; //absolute ref for testing

$.ajax({
    url: ajaxscript,
    data: {
        'action': 'php_tutorial',
        'php_test': test
    },
    success: function(data){
        console.log(data);
   }
});

And use echo in place of return and use wp_die(); before closing function

function our_tutorial(){
    $testing = 'not set';

    if(isset($_REQUEST)){
        $testing = $_REQUEST['php_test'];
    }

    echo json_encode($testing);
    wp_die();

}
 add_action('wp_ajax_php_tutorial', 'our_tutorial'); 
 add_action( 'wp_ajax_nopriv_php_tutorial', 'our_tutorial' );