(PHP 4 >= 4.0.6, PHP 5, PHP 7) Convert character encoding
(PHP 4 >= 4.2.0, PHP 5, PHP 7) Returns start point for next regular expression match
(PHP 4 >= 4.0.6, PHP 5, PHP 7) Decode string in MIME header field
(PHP 4 >= 4.0.6, PHP 5, PHP 7) Detect character encoding
(PHP 4 >= 4.2.0, PHP 5, PHP 7) Returns position and length of a matched part of the multibyte regular expression
(PHP 4 >= 4.0.6, PHP 5, PHP 7) Get MIME charset string
(PHP 4 >= 4.3.0, PHP 5, PHP 7) Set/Get the default options for mbregex functions
(PHP 5 >= 5.3.0, PHP 7) Get aliases of a known encoding type
(PHP 4 >= 4.0.6, PHP 5, PHP 7) Get truncated string with specified width
(PHP 4 >= 4.0.6, PHP 5, PHP 7) Set/Get HTTP output character encoding
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