Problem with string type

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  • Benoît

    Problem with string type

    Hi,

    I try to detect the encoding type of a string $myString which comes
    from a html file.
    $myString = file_get_conten ts($myFileName) ;

    Firstly : I tried to get the charset in <meta charset="iso-8859-1">.
    But I've the following problem. Internet Explorer write ISO-8859-1 even
    if we have save it in Unicode format (UTF-16).

    Secondly : Use a algorithm which detect encoding format
    w3 has proposed this one which detect utf-8 format
    <?php

    // Returns true if $string is valid UTF-8 and false otherwise.
    function is_utf8($string ) {

    // From http://w3.org/International/question...rms-utf-8.html
    return preg_match('%^( ?:
    [\x09\x0A\x0D\x2 0-\x7E] # ASCII
    | [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
    | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
    | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
    | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
    | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
    | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
    | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
    )*$%xs', $string);

    } // function is_utf8

    ?>

    I want the same but foe utf-16 type, does it exist?
    mb_detect_encod ing($ma_chaine, "UTF-16") doesn't work with utf-16.

    The must : detect encoding type without knowing the name and the
    version of the navigator.

    Thanks a lot.

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