if ( ! function_exists( 'testthemes_rewrite_rules' ) ) :

	/**

	 * @param WP_Rewrite $wp_rewrite

	 */

	function testthemes_rewrite_rules( $wp_rewrite ) {

		$testthemes_rules = [

			'about(.*)$' => 'index.php?my_custom_page=about',

		];

		$wp_rewrite->rules = $testthemes_rules + $wp_rewrite->rules;

	}

endif; // testthemes_rewrite_rules

add_action( 'generate_rewrite_rules', 'testthemes_rewrite_rules' );

if ( ! function_exists( 'testthemes_add_query_vars' ) ) :

	/**

	 * @param array $public_query_vars

	 * @return array

	 */

	function testthemes_add_query_vars($public_query_vars) {

		$public_query_vars[] = 'my_custom_page';

		return $public_query_vars;

	}

endif;

add_action( 'query_vars', 'testthemes_add_query_vars' );

if ( ! function_exists( 'testthemes_template_redirect' ) ) :

	/**

	 * @void

	 */

	function testthemes_template_redirect() {

		global $wp;

		/**@var WP_Query $wp_query*/

		global $wp_query;

		/**@var WP_Rewrite $wp_rewrite*/

		global $wp_rewrite;

		//查询my_custom_page变量

		$my_custom_page =  $wp_query->query_vars['my_custom_page'];

		switch ($my_custom_page) {

			case 'about':

				include(TEMPLATEPATH.'/about.php');

				die();

		}

	}

endif;

add_action( 'template_redirect', 'testthemes_template_redirect' );

if ( ! function_exists('testthemes_flush_rewrite_rules')):

	/**

	 * @void

	 */

	function testthemes_flush_rewrite_rules(){

		/**@var string $pagenow*/

		global $pagenow;

		/**@var WP_Rewrite $wp_rewrite*/

		global $wp_rewrite;

		if( 'theme.php' == $pagenow && isset( $_GET['activated'] )) {

			$wp_rewrite->flush_rules();

		}

	}

endif;

add_action( 'load-themes.php', 'testthemes_flush_rewrite_rules' );