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

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].

Adds a base URL to relative links in passed content.

Adds a Target attribute to all links in passed content.

Converts plaintext URI to HTML links.

Maps a function to all non-iterable elements of an array or an object.

Ensures that any hex color is properly hashed.

Normalizes EOL characters and strips duplicate whitespace.

Prints the inline Emoji detection script if it is not already printed.

Prints the important emoji-related styles.