Get custom headers from WordPress Themes

// Imagine you have a style.css with these headers:
/******************************
 * Theme Name: Theme Name
 * Theme URI: ThemeURI
 * Author: Author Name
 * Author URI: AuthorUri
 * Description: ThemeDescription
 * License: License
 * License URI: LicenseURI
 * Tags: ThemeTags
 *
 * Custom Header: Custom Value
 *
 * Custom Header Two: Custom Value
 *
 *****/
// And you need to get the value of Custom Header and/or Custom Header Two
// Here is a function to get standard and custom headers in style.css in WordPress Themes
function getThemeInfo($stylesheet) {
        if(file_exists($stylesheet)) {
            $file = file($stylesheet);
            $contents = array();
            foreach ($file as $lines => $line) {
                preg_match("/\*(.*?):/s", $line, $name);
                preg_match("/:(.*)$/s", $line, $value);
                if($name && $value) {
                    $contents[trim($name[1])] = trim($value[1]);
                }
            }
            return $contents;
        }else{
            return array();
        }
    }
// Running this function on style.css with the headers specified above, would generate an array like this:
// Array
// (
//     [Theme Name] => Theme Name
//     [Theme URI] => ThemeURI
//     [Author] => Author Name
//     [Author URI] => AuthorUri
//     [Description] => ThemeDescription
//     [License] => License
//     [License URI] => LicenseURI
//     [Tags] => ThemeTags
//     [Custom Header] => Custom Value
//     [Custom Header Two] => Custom Value
// )