Multibyte String
PHP Manual


(PHP 4 >= 4.0.6, PHP 5)

mb_detect_order — Set/Get character encoding detection order


mixed mb_detect_order ([ mixed $encoding_list ] )

mb_detect_order() sets automatic character encoding detection order to encoding_list . It returns TRUE for success, FALSE for failure.

encoding_list is array or comma separated list of character encoding. ("auto" is expanded to "ASCII, JIS, UTF-8, EUC-JP, SJIS")

If encoding_list is omitted, it returns current character encoding detection order as array.

This setting affects mb_detect_encoding() and mb_send_mail().

Note: mbstring currently implements following encoding detection filters. If there is an invalid byte sequence for following encoding, encoding detection will fail.
UTF-8, UTF-7, ASCII, EUC-JP,SJIS, eucJP-win, SJIS-win, JIS, ISO-2022-JP For ISO-8859-*, mbstring always detects as ISO-8859-*.
For UTF-16, UTF-32, UCS2 and UCS4, encoding detection will fail always.

Example#1 Useless detect order example

; Always detect as ISO-8859-1 detect_order = ISO-8859-1, UTF-8 ; Always detect as UTF-8, since ASCII/UTF-7 values are ; valid for UTF-8 detect_order = UTF-8, ASCII, UTF-7

Example#2 mb_detect_order() examples

/* Set detection order by enumerated list */

/* Set detection order by array */
$ary[] = "ASCII";
$ary[] = "JIS";
$ary[] = "EUC-JP";

/* Display current detection order */
echo implode(", "mb_detect_order());

See also mb_internal_encoding(), mb_http_input(), mb_http_output() and mb_send_mail().

Multibyte String
PHP Manual