(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) Find the last occurrence of a character in a string

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

(PHP 4, PHP 5, PHP 7) Uppercase the first character of each word in a string

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

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

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

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

(PHP 4, PHP 5, PHP 7) Convert from one Cyrillic character set to another

(PHP 4, PHP 5, PHP 7) Case insensitive string comparisons using a "natural order" algorithm