1. Lấy nội dung ghi chú ở file (ok)

C:\xampp\htdocs\test\wp-content\themes\twentyfifteen-child\example-file.php

/**
 * Version:           1.3.4
 * Author:            Themify
 */

C:\xampp\htdocs\test\wp-content\themes\twentyfifteen-child\functions.php

<?php  
$path = get_theme_file_path() . '/example-file.php';
$plugin_data = get_file_data($path, array('ver' => 'Version'));
echo '<pre>';
	var_export($plugin_data);
echo '</pre>';
?>