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

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

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

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

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Query language and locale information

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

(PHP 4, PHP 5, PHP 7) Get string length int strlen

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