就像下面的方法一样,使用gettext效率更低？

<?PHP
//Have seperate language files for each language I add,this would be english file
function lang($phrase){
    static $lang = array(
        'NO_PHOTO' => 'No photo\'s available','NEW_MEMBER' => 'This user is new'
    );
    return $lang[$phrase];
}
//Then in application where there is text from the site and not from users I would do something like this
echo lang('NO_PHOTO');  // No photo's available would show here
?>