(PHP 4, PHP 5) Make regular expression for case insensitive match
(PHP 4, PHP 5) Case insensitive regular expression match
(PHP 4, PHP 5) Split string into array by regular expression
(PHP 4, PHP 5) Replace regular expression case insensitive
(PHP 4 >= 4.0.1, PHP 5) Split string into array by regular expression case insensitive
(PHP 4, PHP 5) Regular expression match int ereg
(PHP 4, PHP 5) Replace regular expression string