Defined (1)

The function is defined in the following location(s).

/wp-admin/includes/ajax-actions.php  

function wp_ajax_set_attachment_thumbnail() { 
    if ( empty( $_POST['urls'] ) || ! is_array( $_POST['urls'] ) ) { 
        wp_send_json_error(); 
    } 
 
    $thumbnail_id = (int) $_POST['thumbnail_id']; 
    if ( empty( $thumbnail_id ) ) { 
        wp_send_json_error(); 
    } 
 
    $post_ids = array(); 
    // For each URL, try to find its corresponding post ID. 
    foreach ( $_POST['urls'] as $url ) { 
        $post_id = attachment_url_to_postid( $url ); 
        if ( ! empty( $post_id ) ) { 
            $post_ids[] = $post_id; 
        } 
    } 
 
    if ( empty( $post_ids ) ) { 
        wp_send_json_error(); 
    } 
 
    $success = 0; 
    // For each found attachment, set its thumbnail. 
    foreach ( $post_ids as $post_id ) { 
        if ( ! current_user_can( 'edit_post', $post_id ) ) { 
            continue; 
        } 
 
        if ( set_post_thumbnail( $post_id, $thumbnail_id ) ) { 
            $success++; 
        } 
    } 
 
    if ( 0 === $success ) { 
        wp_send_json_error(); 
    } else { 
        wp_send_json_success(); 
    } 
 
    wp_send_json_error(); 
}