ajax - 'is' functions and 'get_query_var' not working

Why does is functions not work inside an Ajax function? Except for is_user_logged_in?

I also tried using get_query_var and it did not work.

jQuery:

jQuery('.post-modal').live('click', function(e) {       

    e.preventDefault();

    var post_id = jQuery(this).data('post-id');

    jQuery.ajax({
        type: 'POST',
        url: mysite.ajax_url,
        data: {
            'action' : 'post_modal_content',
            'post_id' : post_id             
        },                      
        success: function(response) {
            var json = jQuery.parseJSON(response);
            jQuery('#post-modal .content').html(json.html);             
        }                                   
    });     
});

PHP:

function post_modal_content() {

    $post_id = $_POST['post_id'];   

    if (is_author()) {
        set_query_var('post_id', $post_id);
        ob_start();
        get_template_part('content-post-modal');
        $html = ob_get_contents();
        ob_end_clean();  

        $response = array('html' => $html);
        echo json_encode( $response );
        exit;
    }   
}
add_action( 'wp_ajax_post_modal_content', 'post_modal_content' );
add_action( 'wp_ajax_nopriv_post_modal_content', 'post_modal_content' );

If I am on the author page it does not work, but if I take the check everything works fine.

Why does is functions not work inside an Ajax function? Except for is_user_logged_in?

I also tried using get_query_var and it did not work.

jQuery:

jQuery('.post-modal').live('click', function(e) {       

    e.preventDefault();

    var post_id = jQuery(this).data('post-id');

    jQuery.ajax({
        type: 'POST',
        url: mysite.ajax_url,
        data: {
            'action' : 'post_modal_content',
            'post_id' : post_id             
        },                      
        success: function(response) {
            var json = jQuery.parseJSON(response);
            jQuery('#post-modal .content').html(json.html);             
        }                                   
    });     
});

PHP:

function post_modal_content() {

    $post_id = $_POST['post_id'];   

    if (is_author()) {
        set_query_var('post_id', $post_id);
        ob_start();
        get_template_part('content-post-modal');
        $html = ob_get_contents();
        ob_end_clean();  

        $response = array('html' => $html);
        echo json_encode( $response );
        exit;
    }   
}
add_action( 'wp_ajax_post_modal_content', 'post_modal_content' );
add_action( 'wp_ajax_nopriv_post_modal_content', 'post_modal_content' );

If I am on the author page it does not work, but if I take the check everything works fine.

• functions
• ajax
• template-tags

Share Improve this question edited Nov 30, 2018 at 22:38 Krzysiek Dróżdż 25.6k99 gold badges5353 silver badges7474 bronze badges asked Nov 30, 2018 at 22:26 AlexAlex 1555 bronze badges

Add a comment  | 

1 Answer 1

Sorted by: Reset to default 2

You send your AJAX request to /wp-admin/admin-ajax.php (which is very good), so it's not a typical WP request.

During such request, request is not parsed, no global WP_Query is created, and so on.

is_author is a Conditional Tag, which checks if an Author archive page is being displayed. So, by design, it will return false during AJAX request, because AJAX request is not displaying author archive page...

On the other hand, is_user_logged_in() works, because user is still logged in during AJAX request (it's the same session).

PS. It's the same with get_query_var - no query is parsed or executed, so there are no query variables available...