golden hour

/var/www/html/wp-content/plugins/weekly-class/api

File/Folder	Size	Actions
api.export.php	170 B
api.preview.php	1.62 KB
api.woo.php	23.42 KB
api.wp.bookings.php	1.76 KB
api.wp.settings.php	1.57 KB
ical.new.php	1.68 KB

Edit: api.preview.php

<?php

if ( ! class_exists('WP_EX_PAGE_ON_THE_FLY') ){

class WP_EX_PAGE_ON_THE_FLY
    {

public $slug ='';
        public $args = array();

function __construct ( $args ){
          add_action( 'template_redirect', array( $this, 'xyz_create_fake_query' ) );
        //  add_action('init', array($this, 'init') );
          //add_filter('the_posts', array($this,'fly_page') );

$this->args = $args;
          $this->slug = $args['slug'];
        }

public function xyz_create_fake_query(){

$page_slug = $this->slug;

if( isset( $_REQUEST['wcs_preview'] ) && $_REQUEST['wcs_preview'] === $page_slug && isset( $_REQUEST['wcs_schedule_id'] ) && ! empty( $_REQUEST['wcs_schedule_id'] ) && is_numeric( $_REQUEST['wcs_schedule_id'] ) ){

add_filter( 'the_content', array( $this, 'filter_content' ) );
          }

}

public function fly_page($posts){
            global $wp, $wp_query;
            $page_slug = $this->slug;

//check if user is requesting our fake page
            if( $wp->query_vars['page_id'] === $page_slug && isset( $_REQUEST['wcs_schedule_id'] ) && ! empty( $_REQUEST['wcs_schedule_id'] ) && is_numeric( $_REQUEST['wcs_schedule_id'] ) ){

add_filter( 'the_content', array( $this, 'filter_content' ) );
            }

return $posts;
        }

public function filter_content($content){
          return 'asdasd';
        }
    }

}

new WP_EX_PAGE_ON_THE_FLY(array(
        'slug' => 'fake_slug',
        'post_title' => 'Fake Page Title',
        'post content' => 'This is the fake page content'
));