Function: Given an ISO 8601 timezone, returns its UTC offset in seconds.

Function: Given an ISO 8601 (Ymd\TH:i:sO) date, returns a MySQL DateTime (Y-m-d H:i:s) format used by post_date[_gmt].

Function: Callback to convert URI match to HTML A element.

Function: Callback to convert URL match to HTML A element.

Function: Callback to convert email address match to HTML A element.

Function: Breaks a string into chunks by splitting at whitespace characters.

Function: Adds `rel=”nofollow”` string to all HTML A elements in content.

Function: Callback to add `rel=”nofollow”` string to HTML A element.

Function: Converts one smiley code to the icon graphic file equivalent.