(PHP 4, PHP 5, PHP 7) Calculate the similarity between two strings

(PHP 4, PHP 5, PHP 7) Set locale information

(PHP 5, PHP 7) Write a formatted string to a stream

(PHP 4, PHP 5, PHP 7) Convert all applicable characters to HTML entities

(PHP 4, PHP 5, PHP 7) Translate characters or replace substrings

(PHP 4, PHP 5, PHP 7) Case-insensitive

(PECL bbcode >= 0.10.2) Attach another parser in order to use another rule set for argument parsing

(PHP 4, PHP 5, PHP 7) Output one or more strings

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Parses input from a string according to a format