前端未定义ajaxurl

在后端,WordPress本身定义了全局ajaxurl变量.

此变量不是由WP在前端创建的.这意味着,如果要在前端使用AJAX调用,则必须自己定义此类变量.

执行此操作的好方法是使用wp_localize_script.

假设您的AJAX调用位于my-ajax-script.js文件中,然后为该JS文件添加wp_localize_script,如下所示:

 function my_enqueue() {

    wp_enqueue_script( 'ajax-script', get_template_directory_uri() . '/js/my-ajax-script.js', array('jquery') );

    wp_localize_script( 'ajax-script', 'my_ajax_object',
            array( 'ajax_url' => admin_url( 'admin-ajax.php' ) ) );
}
add_action( 'wp_enqueue_scripts', 'my_enqueue' );
 

本地化JS文件后,可以在JS文件中使用my_ajax_object对象:

 jQuery.ajax(
    {
        type: "post",
        dataType: "json",
        url: my_ajax_object.ajax_url,
        data: formData,
        success: function(msg){
            console.log(msg);
        }
    });
 

In backend there is global ajaxurl variable defined by WordPress itself.

This variable is not created by WP in frontend. It means that if you want to use AJAX calls in frontend, then you have to define such variable by yourself.

Good way to do this is to use wp_localize_script.

Let's assume your AJAX calls are in my-ajax-script.js file, then add wp_localize_script for this JS file like so:

function my_enqueue() {

    wp_enqueue_script( 'ajax-script', get_template_directory_uri() . '/js/my-ajax-script.js', array('jquery') );

    wp_localize_script( 'ajax-script', 'my_ajax_object',
            array( 'ajax_url' => admin_url( 'admin-ajax.php' ) ) );
}
add_action( 'wp_enqueue_scripts', 'my_enqueue' );

After localizing your JS file, you can use my_ajax_object object in your JS file:

jQuery.ajax(
    {
        type: "post",
        dataType: "json",
        url: my_ajax_object.ajax_url,
        data: formData,
        success: function(msg){
            console.log(msg);
        }
    });

要直接使用ajaxurl,请在您的插件文件中添加以下内容:

 add_action('wp_head', 'myplugin_ajaxurl');

function myplugin_ajaxurl() {

   echo '<script type="text/javascript">
           var ajaxurl = "' . admin_url('admin-ajax.php') . '";
         </script>';
}
 

然后您可以将ajaxurl用于ajax请求.

to use ajaxurl directly, in your plugin file add this:

add_action('wp_head', 'myplugin_ajaxurl');

function myplugin_ajaxurl() {

   echo '<script type="text/javascript">
           var ajaxurl = "' . admin_url('admin-ajax.php') . '";
         </script>';
}

you can then use the ajaxurl for ajax request.

我在wordpress网站中使用了以下代码.
我们可以这样使用下面的代码来设置ajaxurl.

 <?php echo esc_url(admin_url('admin-ajax.php')); ?>  
 

我还添加了ajax示例,我们可以在上面的行中使用.

  function setNotificationRead() {
        fetch('<?php echo esc_url(admin_url('admin-ajax.php')); ?>', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded; charset=utf-8'
            },
            body: `action=yourFunctionsAction`,
            credentials: 'same-origin'
        }).then(response => {
            return response.json();
        }).then(data => {
            if (data.status === 'true') {
                console.log('Do something...');
            }
        });
    }
 

i have use below code in wordpress site.
we can use below code for setup ajaxurl like this.

<?php echo esc_url(admin_url('admin-ajax.php')); ?>  

i have also added ajax example were we can use above line.

 function setNotificationRead() {
        fetch('<?php echo esc_url(admin_url('admin-ajax.php')); ?>', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded; charset=utf-8'
            },
            body: `action=yourFunctionsAction`,
            credentials: 'same-origin'
        }).then(response => {
            return response.json();
        }).then(data => {
            if (data.status === 'true') {
                console.log('Do something...');
            }
        });
    }