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* Generates the HTML for an inline Help Button and Panel.
class WPSEO_Admin_Help_Panel {
* Unique identifier of the element the inline help refers to, used as an identifier in the html.
* The Help Button text. Needs a properly escaped string.
private $help_button_text;
* The Help Panel content. Needs a properly escaped string (might contain HTML).
* Optional Whether to print out a container div element for the Help Panel, used for styling.
* @param string $id Unique identifier of the element the inline help refers to, used as
* an identifier in the html.
* @param string $help_button_text The Help Button text. Needs a properly escaped string.
* @param string $help_content The Help Panel content. Needs a properly escaped string (might contain HTML).
* @param string $wrapper Optional Whether to print out a container div element for the Help Panel,
* Pass a `has-wrapper` value to print out the container. Default: no container.
public function __construct( $id, $help_button_text, $help_content, $wrapper = '' ) {
$this->help_button_text = $help_button_text;
$this->help_content = $help_content;
$this->wrapper = $wrapper;
* Returns the html for the Help Button.
public function get_button_html() {
if ( ! $this->id || ! $this->help_button_text || ! $this->help_content ) {
' <button type="button" class="yoast_help yoast-help-button dashicons" id="%1$s-help-toggle" aria-expanded="false" aria-controls="%1$s-help"><span class="yoast-help-icon" aria-hidden="true"></span><span class="screen-reader-text">%2$s</span></button>',
* Returns the html for the Help Panel.
public function get_panel_html() {
if ( ! $this->id || ! $this->help_button_text || ! $this->help_content ) {
if ( $this->wrapper === 'has-wrapper' ) {
$wrapper_start = '<div class="yoast-seo-help-container">';
'%1$s<p id="%2$s-help" class="yoast-help-panel">%3$s</p>%4$s',