(PHP 4, PHP 5, PHP 7) Translate characters or replace substrings

(PHP 4, PHP 5, PHP 7) Case-insensitive

(PHP 4, PHP 5, PHP 7) Output one or more strings

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Parses input from a string according to a format

(PHP 4, PHP 5, PHP 7) Count the number of substring occurrences

(PHP 5, PHP 7) Uuencode a string string convert_uuencode

(PHP 4, PHP 5, PHP 7) Quote meta characters string

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

(PHP 4, PHP 5, PHP 7) Calculate the md5 hash of a string

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Return information about words used in a string