我创建了一种为帖子选择不同布局的方法（右侧边栏、左侧边栏、全宽）。这是通过一个元框完成的，该元框显示单选按钮，每个布局类型都有一个图像。例如，当我选择第一个布局图像single时。当我选择第二个图像single-template-1时，php文件已加载。php文件已加载，当我选择第三个图像single-template-2时。php已加载。

现在，这一切都很好，但我不能停止思考，这可能是一个混乱的方法，因为3个单模板之间的唯一区别是单模板-1。php在左侧显示侧栏和single-template-2。php根本不显示边栏。

我只是想知道这是不是一种方法，或者是否有一种方法可以将此功能整合到一个单独的功能中。php文件，这可能是一个更干净的解决方案。

meta box code which is responsible for loading the different single templates:

<?php

function my_theme_add_meta_box_post_template_switcher() {

add_meta_box( \'my_theme-post-layout\', __( \'Post template\', \'my_theme\' ), \'my_theme_show_post_template_switcher\', \'post\', \'normal\', \'high\' );
}

add_action( \'add_meta_boxes\', \'my_theme_add_meta_box_post_template_switcher\' );


function my_theme_show_post_template_switcher( $post ) {
$template = get_post_meta( $post->ID, \'_my_theme_post_template\', true );

// Default template for new posts
if( empty( $template ) ) {
    $template = \'default\';
}

wp_nonce_field( \'save_post_template\', \'post_template\' );

?>
<fieldset class="clearfix">
<div class="post-layout">
    <label for="default-post" id="default-post-layout">
        <input type="radio" id="default-post" name="_my_theme_post_template" value="default" <?php checked( $template, \'default\' ); ?> />
        <img width="150" height="100" src="<?php echo get_template_directory_uri(); ?>/admin/images/default.png" >
        <span> <?php _e( \'Default\', \'my_theme\' ); ?> </span>
    </label>
</div>
<div class="post-layout">
    <label for="sidebar-left-post">
        <input type="radio" id="sidebar-left-post" name="_my_theme_post_template" value="template-1" <?php checked( $template, \'template-1\' ); ?> />
        <img width="150" height="100" src="<?php echo get_template_directory_uri(); ?>/admin/images/left-sidebar.png" >
        <span> <?php _e( \'Sidebar left\', \'my_theme\' ); ?> </span>
    </label>
</div>
<div class="post-layout">
    <label for="full-width-post">
        <input type="radio" id="full-width-post" name="_my_theme_post_template" value="template-2" <?php checked( $template, \'template-2\' ); ?> />
        <img width="150" height="100" src="<?php echo get_template_directory_uri(); ?>/admin/images/full-width-layout.png" >
        <span> <?php _e( \'Full width\', \'my_theme\' ); ?> </span>
    </label>
</div>
</fieldset>
<?php
}

function my_theme_save_post_template( $post_id ) {
if( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE ) {
    return;
}

if( !isset( $_POST[\'post_template\'] ) || !wp_verify_nonce( $_POST[\'post_template\'], \'save_post_template\' ) ) {
    return;
}

if( !current_user_can( \'edit_post\' ) ) {
    return;
}

if( isset( $_POST[\'_my_theme_post_template\'] ) ) {
    update_post_meta( $post_id, \'_my_theme_post_template\', esc_attr( strip_tags( $_POST[\'_my_theme_post_template\'] ) ) );
}
}

add_action( \'save_post\', \'my_theme_save_post_template\' );


function my_theme_get_post_template_for_template_loader( $template ) {
$post = get_queried_object();

if ( $post ) {

    $post_template = get_post_meta( $post->ID, \'_my_theme_post_template\', true );

    if ( !empty( $post_template) && $post_template != \'default\' ) {
      $template = get_stylesheet_directory() . "/single-{$post_template}.php";
    }
}

return $template;
}

My single.php file:

<?php get_header(); ?>

<div class="main-content col-md-8" role="main">

    <?php while (have_posts()) : the_post(); ?>

        <?php get_template_part( \'content\', get_post_format() ); ?>

        <?php comments_template(); ?>
    <?php endwhile; ?>
</div> <!-- end .main-content -->


<?php get_sidebar(); ?>

<?php get_footer(); ?>

My single-template-1.php, the sidebar left template:

<?php get_header(); ?>

<?php get_sidebar(); ?>

<div class="main-content col-md-8" role="main">

    <?php while (have_posts()) : the_post(); ?>

        <?php get_template_part( \'content\', get_post_format() ); ?>

        <?php comments_template(); ?>
    <?php endwhile; ?>
</div> <!-- end .main-content -->

<?php get_footer(); ?>

My single-template-2.php, full width template:

<?php get_header(); ?>

<div class="main-content col-md-12" role="main">

    <?php while (have_posts()) : the_post(); ?>

        <?php get_template_part( \'content\', get_post_format() ); ?>

        <?php comments_template(); ?>
    <?php endwhile; ?>
</div> <!-- end .main-content -->

<?php get_footer(); ?>