post_password_required( int|WP_Post|null $post = null ): bool

879function post_password_required( $post = null ) {880	$post = get_post( $post );881 882	if ( empty( $post->post_password ) ) {883		/** This filter is documented in wp-includes/post-template.php */884		return apply_filters( 'post_password_required', false, $post );885	}886 887	if ( ! isset( $_COOKIE[ 'wp-postpass_' . COOKIEHASH ] ) ) {888		/** This filter is documented in wp-includes/post-template.php */889		return apply_filters( 'post_password_required', true, $post );890	}891 892	require_once ABSPATH . WPINC . '/class-phpass.php';893	$hasher = new PasswordHash( 8, true );894 895	$hash = wp_unslash( $_COOKIE[ 'wp-postpass_' . COOKIEHASH ] );896	if ( ! str_starts_with( $hash, '$P$B' ) ) {897		$required = true;898	} else {899		$required = ! $hasher->CheckPassword( $post->post_password, $hash );900	}901 902	/**903	 * Filters whether a post requires the user to supply a password.904	 *905	 * @since 4.7.0906	 *907	 * @param bool    $required Whether the user needs to supply a password. True if password has not been908	 *                          provided or is incorrect, false if password has been supplied or is not required.909	 * @param WP_Post $post     Post object.910	 */911	return apply_filters( 'post_password_required', $required, $post );912}