WordPress AJAX中的UPDATE_OPTION

我有一个例子：

For example, this code will register a callback called "wpa_49691":

add_action( \'wp_ajax_wpa_49691\', \'wpa_49691_callback\' );
add_action( \'wp_ajax_nopriv_wpa_49691\', \'wpa_49691_callback\' );
function wpa_49691_callback() {
    // Do whatever you need with update_option() here.
    // You have full access to the $_POST object.
}

然后，发布所需的任何数据，只需在对象中指定操作：

<script type="text/javascript">
    jQuery(document).ready(function($) {
        var data = {
            action: \'wpa_49691\',
            my_var: \'my_data\'
        };

        jQuery.post( ajaxurl, data, function(response) {
            // handle response from the AJAX request.
        });
    });
</script>

此脚本将把您的数据发布到服务器。在服务器回调中，您将看到$\\u POST[\'my\\u var\']=“my\\u data”。

我认为代码是有用的。但我不知道怎么做……）我有很多问题：1。。。。只需在对象中指定操作-在何处以及如何指定此操作？如何使用函数wpa\\u 49691\\u callback（）？函数wpa\\u 49691\\u callback（）？是php还是js函数？例如，单击时调用JS脚本？

请给我一个工作示例。。

//First enqueue your javascript in WordPress function your_prefix_enqueue_scripts(){ //Enqueue your Javascript (this assumes your javascript file is located in your plugin in an "includes/js" directory) wp_enqueue_script( \'your_unique_js_name\', plugins_url(\'js/yourjavascriptfile.js\', dirname(__FILE__) ), array( \'jquery\' ) ); //OR (simpler but not recommended) wp_enqueue_script( \'your_unique_js_name\', \'http://domain.com/myjavascriptfile.js\', array( \'jquery\' ) ); //Here we create a javascript object variable called "youruniquejs_vars". We can access any variable in the array using youruniquejs_vars.name_of_sub_variable wp_localize_script( \'your_unique_js_name\', \'youruniquejs_vars\', array( //To use this variable in javascript use "youruniquejs_vars.ajaxurl" \'ajaxurl\' => admin_url( \'admin-ajax.php\' ), ) ); } add_action( \'wp_enqueue_scripts\', \'your_prefix_enqueue_scripts\' );

//This is your Ajax callback function function your_ajax_callback_function_name(){ //Get the post data $my_var = $_POST["my_var"]; //Do your stuff here - maybe an update_option as you mentioned... //Create the array we send back to javascript here $array_we_send_back = array( \'test\' => "Test" ); //Make sure to json encode the output because that\'s what it is expecting echo json_encode( $array_we_send_back ); //Make sure you die when finished doing ajax output. die(); } add_action( \'wp_ajax_\' . \'wpa_49691\', \'your_ajax_callback_function_name\' ); add_action( \'wp_ajax_nopriv_\' . \'wpa_49691\', \'your_ajax_callback_function_name\' );

jQuery(document).ready(function($){ /** * When your ajax trigger button is clicked * (if the button\'s class is .my-button) * */ $( document ).on( \'click\', \'.my-button\', function(event){ event.preventDefault(); // Use ajax to do something... var postData = { action: \'wpa_49691\', my_var: \'my_data\', } //Ajax load more posts $.ajax({ type: "POST", data: postData, dataType:"json", url: youruniquejs_vars.ajaxurl, //This fires when the ajax \'comes back\' and it is valid json success: function (response) { alert( response.test ); } //This fires when the ajax \'comes back\' and it isn\'t valid json }).fail(function (data) { console.log(data); }); }); });

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