protected function _get_domain( $content ) {
		$permalink = $this->get_permalink();
		if ( ! $permalink ) {
			$permalink = $this->_get_permalink( $content );
		}

		preg_match( '/https?:\/\/([^\/]+)/', $permalink, $reg );
		if ( ! empty( $reg[1] ) ) {
			return $reg[1];
		}
	}
protected function _get_domain( $content ) {
		$permalink = $this->get_permalink();
		if ( ! $permalink ) {
			$permalink = $this->_get_permalink( $content );
		}

		preg_match( '/https?:\/\/([^\/]+)/', $permalink, $reg );
		if ( ! empty( $reg[1] ) ) {
			return $reg[1];
		}
	}
protected function _get_domain ( $ content ) { $ permalink = $ this -> get_permalink ( ) ; if ( ! $ permalink ) { $ permalink = $ this -> _get_permalink ( $ content ) ; } preg_match ( '/https?:\/\/([^\/]+)/' , $ permalink , $ reg ) ; if ( ! empty ( $ reg [ 1 ] ) ) { return $ reg [ 1 ] ; } }
Return domain of the page you want to blog card

@param string $content
@return string
Return domain of the page you want to blog card