: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
namespace Yoast\WP\SEO\Values\Robots;
* The user agent identifier.
* All directives that are allowed for this user agent.
private $allow_directive;
* All directives that are disallowed for this user agent.
private $disallow_directive;
* Constructor of the user agent value object.
* @param string $user_agent The user agent identifier.
public function __construct( $user_agent ) {
$this->user_agent = $user_agent;
$this->allow_directive = new Directive();
$this->disallow_directive = new Directive();
* Gets the user agent identifier.
public function get_user_agent() {
return $this->user_agent;
* Adds a path to the directive object.
* @param string $path The path to add to the disallow directive.
public function add_disallow_directive( $path ) {
$this->disallow_directive->add_path( $path );
* Adds a path to the directive object.
* @param string $path The path to add to the allow directive.
public function add_allow_directive( $path ) {
$this->allow_directive->add_path( $path );
* Gets all disallow paths for this user agent.
public function get_disallow_paths() {
return $this->disallow_directive->get_paths();
* Gets all sallow paths for this user agent.
public function get_allow_paths() {
return $this->allow_directive->get_paths();