Running maintenance scripts directly is deprecated since MW 1.40, and instead we're told to use "php maintenance/run.php someScript.php". However, the MW documentation is obsolete in this respect and it still uses the old form virtually everywhere, I'd like to address that but there's no way I'm editing hundreds of pages one by one.
If someone were to install Extension:Replace_Text or equivalent and grant access to it for autoconfirmed users I'd be glad to do it, though.