(PHP 4 >= 4.2.0, PHP 5, PHP 7) Regular expression match with multibyte support

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Callback function converts character encoding in output buffer

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Get truncated string with specified width

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Replace regular expression with multibyte support ignoring case

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Set/Get HTTP output character encoding

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Regular expression match for multibyte string

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Encode string for MIME header

(PHP 5 >= 5.3.0, PHP 7) Get aliases of a known encoding type

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Get part of string

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Return width of string