Class to wrap WordPress functions and return instead of echo

wpget.php

<?php

class WpGet {
    public static function __callStatic($name, $args) {
        if (function_exists($name)) {
            ob_start();
            $name($args);
            $result = ob_get_contents();
            ob_end_clean();
            return $result;
        }
        return false;
    }
}

$title = WpGet::single_tag_title();