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

(PHP 4, PHP 5, PHP 7) Replace all occurrences of the search string with the replacement string

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

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Binary safe case-insensitive string comparison of the first n characters

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

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

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

(PHP 4, PHP 5, PHP 7) Convert special characters to HTML entities

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

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