iconv_strlen function 支持的 PHP 字符编码？

Question

What character encodings does the iconv_strlen function supports.

And what languages does each character encoding represent?

Answer 1

http://www.php.net/manual/en/intro.iconv.php

iconv is not a part of PHP, rather PHPs iconv functions are a module which allow access to the iconv lib functionality.

specific support for encodings is dependent on your systems implementation.

that said, you probably have the GNU implementation (or can get it)

which supports the following

European languages
    ASCII, ISO-8859-{1,2,3,4,5,7,9,10,13,14,15,16}, KOI8-R, KOI8-U, KOI8-RU, CP{1250,1251,1252,1253,1254,1257}, CP{850,866,1131},         Mac{Roman,CentralEurope,Iceland,Croatian,Romania}, Mac{Cyrillic,Ukraine,Greek,Turkish}, Macintosh

Semitic languages   
    ISO-8859-{6,8}, CP{1255,1256}, CP862, Mac{Hebrew,Arabic}
Japanese
    EUC-JP, SHIFT_JIS, CP932, ISO-2022-JP, ISO-2022-JP-2, ISO-2022-JP-1
Chinese
    EUC-CN, HZ, GBK, CP936, GB18030, EUC-TW, BIG5, CP950, BIG5-HKSCS, BIG5-HKSCS:2001, BIG5-HKSCS:1999, ISO-2022-CN, ISO-2022-CN-EXT
Korean
    EUC-KR, CP949, ISO-2022-KR, JOHAB
Armenian
    ARMSCII-8
Georgian
    Georgian-Academy, Georgian-PS
Tajik
    KOI8-T
Kazakh
    PT154, RK1048
Thai
    ISO-8859-11, TIS-620, CP874, MacThai
Laotian
    MuleLao-1, CP1133
Vietnamese
    VISCII, TCVN, CP1258
Platform specifics
    HP-ROMAN8, NEXTSTEP
Full Unicode
    UTF-8
    UCS-2, UCS-2BE, UCS-2LE
    UCS-4, UCS-4BE, UCS-4LE
    UTF-16, UTF-16BE, UTF-16LE
    UTF-32, UTF-32BE, UTF-32LE
    UTF-7
    C99, JAVA 

Full Unicode, in terms of uint16_t or uint32_t (with machine dependent endianness and alignment)
    UCS-2-INTERNAL, UCS-4-INTERNAL

Locale dependent, in terms of `char' or `wchar_t' (with machine dependent endianness and alignment, and with OS and locale dependent semantics)
    char, wchar_t
The empty encoding name "" is equivalent to "char": it denotes the locale dependent character encoding.

When configured with the option --enable-extra-encodings, it also provides support for a few extra     encodings:

European languages
    CP{437,737,775,852,853,855,857,858,860,861,863,865,869,1125}
Semitic languages
    CP864
Japanese
    EUC-JISX0213, Shift_JISX0213, ISO-2022-JP-3
Chinese
    BIG5-2003 (experimental)
Turkmen
    TDS565
Platform specifics
    ATARIST, RISCOS-LATIN1