我正在使用Post templates 插件。但它非常过时。

我正在Warning: Illegal offset type 在这条线上

$templates = $themes[$theme][\'Template Files\'];

function get_post_templates() {
    $themes = wp_get_themes();
    $theme = wp_get_theme();
    $templates = $themes[$theme][\'Template Files\'];
    $post_templates = array();

    $base = array(trailingslashit(get_template_directory()), trailingslashit(get_stylesheet_directory()));

    foreach ((array)$templates as $template) {
        $template = WP_CONTENT_DIR . str_replace(WP_CONTENT_DIR, \'\', $template); 
        $basename = str_replace($base, \'\', $template);

        // don\'t allow template files in subdirectories
        if (false !== strpos($basename, \'/\'))
            continue;

        $template_data = implode(\'\', file( $template ));

        $name = \'\';
        if (preg_match( \'|Single Post Template:(.*)$|mi\', $template_data, $name))
            $name = _cleanup_header_comment($name[1]);

        if (!empty($name)) {
            if(basename($template) != basename(__FILE__))
                $post_templates[trim($name)] = $basename;
        }
    }

    return $post_templates;

}