priority = $priority;
}
/**
* Registers all hooks to WordPress.
*
* @return void
*/
public function register_hooks() {
add_filter( 'wpseo_help_center_items', array( $this, 'add_meta_options_help_center_tabs' ), $this->priority );
add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_assets' ) );
}
/**
* Enqueues the styles needed in the Help Center tab.
*
* @return void
*/
public function enqueue_assets() {
$asset_manager = new WPSEO_Admin_Asset_Manager();
$asset_manager->enqueue_style( 'admin-css' );
}
/**
* Adds help tabs.
*
* @param array $tabs Current help center tabs.
*
* @return array List containing all the additional tabs.
*/
public function add_meta_options_help_center_tabs( $tabs ) {
$tabs[] = new WPSEO_Help_Center_Item(
'template-variables',
__( 'Snippet variables', 'wordpress-seo' ),
array( 'content' => $this->get_content() )
);
return $tabs;
}
/**
* Adds template variables to the help center.
*
* @return string The content for the template variables tab.
*/
private function get_content() {
$explanation = sprintf(
/* translators: %1$s expands to Yoast SEO. */
__( 'The search appearance settings for %1$s are made up of variables that are replaced by specific values from the page when the page is displayed. The table below contains a list of the available variables.', 'wordpress-seo' ),
'Yoast SEO'
);
$output_explanation = sprintf(
'%s
%s
%s
',
esc_html( __( 'Snippet variables', 'wordpress-seo' ) ),
esc_html( $explanation ),
esc_html( __( 'Note that not all variables can be used in every field.', 'wordpress-seo' ) )
);
$output_basic = sprintf(
'%s
%s',
esc_html( __( 'Basic Variables', 'wordpress-seo' ) ),
WPSEO_Replace_Vars::get_basic_help_texts()
);
$output_advanced = sprintf(
'%s
%s',
esc_html( __( 'Advanced Variables', 'wordpress-seo' ) ),
WPSEO_Replace_Vars::get_advanced_help_texts()
);
return $output_explanation . $output_basic . $output_advanced;
}
}