(PHP 4 >= 4.3.0, PHP 5, PHP 7) Formats a number as a currency string

(PHP 4, PHP 5, PHP 7) Make a string lowercase

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

(PHP 4 >= 4.0.5, PHP 5, PHP 7) Get numeric formatting information

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

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

(PHP 4, PHP 5, PHP 7) Find the first occurrence of a string

(PHP 4, PHP 5, PHP 7) Finds the length of the initial segment of a string consisting entirely of characters

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

(PHP 4, PHP 5, PHP 7) Return information about characters used in a string