Miscellany
public text v1 · immutable< $String = preg_replace_callback("/[\b]?((advocacy|alpha|bin|conf|docs|gnu|i386|ia64|java|kern|misc|ports|powerpc|sparc64|standards|www)\/\d+)/", 'pr2link', $String);
---
> $String = preg_replace_callback("/[\b]+((advocacy|alpha|bin|conf|docs|gnu|i386|ia64|java|kern|misc|ports|powerpc|sparc64|standards|www)\/\d+)/", 'pr2link', $String);