- print_r: documentation ( source)
- preg_match_all: documentation ( source)
<?php
$body = "something
use Modules\Cms\Classes\Content;
use Modules\Cms\Classes\Theme;
use Modules\System\Classes\ApplicationException;
use Modules\Cms\Classes\Router;
class ...
";
$namespaces = array();
preg_match_all('/(use\s[a-z0-9_\\]+;)/m', $body, $namespaces);
print_r($namespaces);