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

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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);
   }
});
Copy code

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' );
Copy code

Undefined asked

2023-09-25

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About the technologies asked in this question

PHP

PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites. The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
https://www.php.net/

JQuery

JQuery is arguably the most popular JavaScript library with so many features for modern development. JQuery is a fast and concise JavaScript library created by John Resig in 2006. It is a cross-platform JavaScript library designed to simplify client-side HTML scripting. Over 19 million websites are currently using jQuery! Companies like WordPress, Facebook, Google, IBM and many more rely on jQuery to provide a kind of web browsing experience.
https://jquery.com/

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