最重要的get_page_template() 只是一个快速的破解。它不允许从管理屏幕中选择模板，页面段塞被硬编码到插件中，因此用户无法知道模板来自何处。

The preferred solution 将遵循this tutorial 它允许您在插件的后端注册页面模板。然后它就像其他模板一样工作。

 /*
 * Initializes the plugin by setting filters and administration functions.
 */
private function __construct() {
        $this->templates = array();

        // Add a filter to the attributes metabox to inject template into the cache.
        add_filter(\'page_attributes_dropdown_pages_args\',
            array( $this, \'register_project_templates\' ) 
        );

        // Add a filter to the save post to inject out template into the page cache
        add_filter(\'wp_insert_post_data\', 
            array( $this, \'register_project_templates\' ) 
        );

        // Add a filter to the template include to determine if the page has our 
        // template assigned and return it\'s path
        add_filter(\'template_include\', 
            array( $this, \'view_project_template\') 
        );

        // Add your templates to this array.
        $this->templates = array(
                \'goodtobebad-template.php\'     => \'It\\\'s Good to Be Bad\',
        );
}

之前的答案都不适合我。在这里，您可以在Wordpress admin中选择模板。只需将其放在主php插件文件中并更改template-configurator.php 按模板名称

//Load template from specific page
add_filter( \'page_template\', \'wpa3396_page_template\' );
function wpa3396_page_template( $page_template ){

    if ( get_page_template_slug() == \'template-configurator.php\' ) {
        $page_template = dirname( __FILE__ ) . \'/template-configurator.php\';
    }
    return $page_template;
}

/**
 * Add "Custom" template to page attirbute template section.
 */
add_filter( \'theme_page_templates\', \'wpse_288589_add_template_to_select\', 10, 4 );
function wpse_288589_add_template_to_select( $post_templates, $wp_theme, $post, $post_type ) {

    // Add custom template named template-custom.php to select dropdown 
    $post_templates[\'template-configurator.php\'] = __(\'Configurator\');

    return $post_templates;
}

是的，这是可能的。我找到了这个example plugin 非常有帮助。

我脑海中浮现的另一种方法是WP Filesystem API 创建要主题的模板文件。我不确定这是最好的方法，但我相信它是有效的！