我的目标是在WordPress中创建最简单的ajax调用，但我不知道它是如何工作的。

JS文件：

jQuery("#votepostform").submit(function() {

    var url = "file.php"; // php script to handle form

    jQuery.ajax({
           type: "POST",
           url: url,
           data: jQuery("#votepostform").serialize(), // serializes the form\'s elements.
           success: function(data)
           {
               alert(data); // show response from the php script.
           }
         });

    return false; // avoid to execute the actual submit of the form.
});

表单HTML：

<form action="" method="post" id="votepostform" />
    <input type="hidden" name="postid" value="333" />
    <button type="send" name="vote" class="vote_link"></button>
</form>

文件。php：

echo \'<script language=\\\'javascript\\\'>alert(\\\'It works! \\\');</script>\';

如何使此ajax代码在WordPress站点中工作？

yoursite.com/wp-admin/admin-ajax.php?action=simple_ajax

add_action(\'wp_ajax_nopriv_simple_ajax\',\'process_simple_ajax\'); //for non logged in user
add_action(\'wp_ajax_simple_ajax\',\'process_simple_ajax\'); //for nlogged in user

function process_simple_ajax(){
    $data = $_REQUEST; // retrieve your submitted data
    wp_send_json($data); // return the processed data to the browser as json
}