apply_filters( 'template_include', string $template )

使用示例

• 示例1

  如果找到了新模板文件，此示例将在名为“portfolio”的页面上引入一个新模板。

  add_filter( 'template_include', 'portfolio_page_template', 99 );
  function portfolio_page_template( $template ) {
      if ( is_page( 'portfolio' )  ) {
          $new_template = locate_template( array( 'portfolio-page-template.php' ) );
  	if ( '' != $new_template ) {
  	    return $new_template ;
  	}
      }
      return $template;
  }

• 示例2

  /**
  * multiple custom routing with one page
  */
  add_filter( 'template_include', 'wpdocs_include_template_files_on_page' );
  
  function wpdocs_include_template_files_on_page( $template ) {
  
  	$action = isset( $_GET['action'] ) ? $_GET['action'] : 'list';
  
  	switch ( $action ) {
  
  		case 'add-list' :
  			$template = __DIR__ . 'views/address-new.php';
  			break;
  
  		case 'edit-list' :
  			$template = __DIR__ . 'views/address-edit.php';
  			break;
  
  		case 'view-list' :
  			$template = __DIR__ . 'views/address-view.php';
  			break;
  
  		default :
  			$template = __DIR__ . 'views/address-list.php';
  			break;			
  	}
  
  	return $template;
  }