(PHP 4 >= 4.3.0, PHP 5, PHP 7) Calculate the sha1 hash of a file

(PECL bbcode >= 0.10.2) Adds a smiley to the parser

(PHP 4, PHP 5, PHP 7) Alias of

(PHP 4, PHP 5, PHP 7) Inserts HTML line breaks before all newlines in a string

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Randomly shuffles a string

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

(PHP 5 >= 5.3.0, PHP 7) Make a string's first character lowercase

(PHP >= 5.4.0) Decodes a hexadecimally encoded binary string

(PHP 4, PHP 5, PHP 7) Split a string by string

(PHP 4, PHP 5, PHP 7) Quote regular expression characters