让WordPress记住不同主题下所选择的的页面模板

<?php
/*
Template Name: archives
*/
?>

<?php /* Template Name: archives */ ?>

/**
 * When a page's `_wp_page_template` key is updated - duplicate this value with the key 
 * `_wp_page_template_{theme-name}`. `{theme-name}` is the theme's folder name.
 * 
 * Hooks onto `added_post_meta`
 * Hooks onto `updated_post_meta`
 * 
 * @param int $meta_id
 * @param int $post_id
 * @param string $meta_key
 * @param string $meta_value
 */
function rmt_update_post_template_meta( $meta_id, $post_id, $meta_key, $meta_value ){
 
	if( '_wp_page_template' === $meta_key ){
 
		$theme = wp_get_theme();
		$name = $theme->template;
		if( $name ){
			update_post_meta( $post_id, '_wp_page_template_' . $name, $meta_value );
		}
 
	}
 
}
add_action( "updated_post_meta", "rmt_update_post_template_meta", 10, 4 );
add_action( "added_post_meta", "rmt_update_post_template_meta", 10, 4 );
 
/**
 * When retrieving a page's `_wp_page_template` replace this with the value associated with
 * `_wp_page_template_{theme-name}`, if it exists. `{theme-name}` is the theme's folder name.
 * 
 * Hooks onto `get_post_metadata`
 * 
 * @param mixed $value This is `null`, unless we over-ride it with our own value. 
 * @param int $post_id
 * @param string $meta_key
 * @param bool $single
 * @return Ambigous <mixed, string, multitype:, boolean, unknown, string>
 */
function rmt_get_post_template_meta( $value, $post_id, $meta_key, $single ){
 
	if( '_wp_page_template' === $meta_key ){
 
		$theme = wp_get_theme();
		$name = $theme->template;
 
		if( $name ){
			$template = get_post_meta( $post_id, '_wp_page_template_' . $name, $single );
			if( $template  && locate_template( $template ) ){
				$value = $template;
			}
		}
 
	}
 
	return $value;
}
add_filter( 'get_post_metadata', 'rmt_get_post_template_meta', 10, 4 );

/** * When a page's `_wp_page_template` key is updated - duplicate this value with the key * `_wp_page_template_{theme-name}`. `{theme-name}` is the theme's folder name. * * Hooks onto `added_post_meta` * Hooks onto `updated_post_meta` * * @param int $meta_id * @param int $post_id * @param string $meta_key * @param string $meta_value */ function rmt_update_post_template_meta( $meta_id, $post_id, $meta_key, $meta_value ){ if( '_wp_page_template' === $meta_key ){ $theme = wp_get_theme(); $name = $theme->template; if( $name ){ update_post_meta( $post_id, '_wp_page_template_' . $name, $meta_value ); } } } add_action( "updated_post_meta", "rmt_update_post_template_meta", 10, 4 ); add_action( "added_post_meta", "rmt_update_post_template_meta", 10, 4 ); /** * When retrieving a page's `_wp_page_template` replace this with the value associated with * `_wp_page_template_{theme-name}`, if it exists. `{theme-name}` is the theme's folder name. * * Hooks onto `get_post_metadata` * * @param mixed $value This is `null`, unless we over-ride it with our own value. * @param int $post_id * @param string $meta_key * @param bool $single * @return Ambigous <mixed, string, multitype:, boolean, unknown, string> */ function rmt_get_post_template_meta( $value, $post_id, $meta_key, $single ){ if( '_wp_page_template' === $meta_key ){ $theme = wp_get_theme(); $name = $theme->template; if( $name ){ $template = get_post_meta( $post_id, '_wp_page_template_' . $name, $single ); if( $template && locate_template( $template ) ){ $value = $template; } } } return $value; } add_filter( 'get_post_metadata', 'rmt_get_post_template_meta', 10, 4 );