(PHP 4, PHP 5, PHP 7) Un-quote string quoted with

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Convert all HTML entities to their applicable characters

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Calculate Levenshtein distance between two strings

(PHP 4, PHP 5, PHP 7) Returns the translation table used by htmlspecialchars()

(PHP 4, PHP 5, PHP 7) One-way string hashing

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

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

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

(PHP 4, PHP 5, PHP 7) Calculate the metaphone key of a string

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