(PHP 5 >= 5.3.0, PHP 7) Parse a CSV string into an array

(PHP 4, PHP 5, PHP 7) Output a string int print

(PECL bbcode >= 0.9.0) Parse a string following a given rule set

(PHP 4, PHP 5, PHP 7) Return part of a string

(PHP 4, PHP 5, PHP 7) Find the position of the last occurrence of a substring in a string

(PHP 4, PHP 5, PHP 7) Perform a regular expression match

(PHP 4, PHP 5, PHP 7) Find the last occurrence of a character in a string

(PHP 4, PHP 5, PHP 7) Format a number with grouped thousands

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Pad a string to a certain length with another string

(PHP 4, PHP 5) Case insensitive regular expression match