/**
* register our custom templates in the wp cache, overriding the menu that wp uses
* thanks to http://www.wpexplorer.com/wordpress-page-templates-plugin
*/
public function register_custom_templates($attrs)
{
$page_templates = [];
foreach (Page_Template::getAll() as $template) {
$page_templates[$template->name] = $template->name;
unset($template);
}
// Create the key used for the themes cache
$cache_key = 'page_templates-' . md5(get_theme_root() . '/' . get_stylesheet());
// Retrieve the cache list. If it doesn't exist, or it's empty prepare an array
$templates = wp_get_theme()->get_page_templates();
if (empty($templates)) {
$templates = array();
}
// New cache, therefore remove the old one
wp_cache_delete($cache_key, 'themes');
// Now add our template to the list of templates by merging our templates with the existing templates array from the cache.
$templates = array_merge($templates, $page_templates);
// Add the modified cache to allow WordPress to pick it up for listing available templates
wp_cache_add($cache_key, $templates, 'themes', 1800);
return $attrs;
}
