encoding - 用PHP如何检测一个ZIP包内的文件是在何种编码的系统下创建的

<?php
/* well ... prepare our zip file ... */
$zip = new ZipArchive;
$res = $zip->open( '/path/to/your.zip' );

/* can not open ..? are you kidding me ..? */
if ( true !== $res )
    throw new Exception( 'Can Not Open Zip File / ' . $res );

/* default value of file encoding ... */
$encoding = 'EMTPY';

/* controller ... change this if mb_detect_encoding return wrong answer ... */
$controller = null;

/* get file list ... */
for ( $i = 0; $i < $zip->numFiles; ++ $i ) {

    /* get file encoding ... */
    $encoding = mb_detect_encoding( $zip->getNameIndex( $i ), $controller );

    /* we do not need english named files ... */
    if ( 'ASCII' !== $encoding ) break;

}

/* clean table ... */
$zip->close();

/* simply output ... */
echo $encoding;

4.6 Third Party Mappings
------------------------
                 
   4.6.1 Third party mappings commonly used are:

          0x07c8        Macintosh
          0x2605        ZipIt Macintosh
          0x2705        ZipIt Macintosh 1.3.5+
          0x2805        ZipIt Macintosh 1.3.5+
          0x334d        Info-ZIP Macintosh
          0x4341        Acorn/SparkFS 
          0x4453        Windows NT security descriptor (binary ACL)
          0x4704        VM/CMS
          0x470f        MVS
          0x4b46        FWKCS MD5 (see below)
          0x4c41        OS/2 access control list (text ACL)
          0x4d49        Info-ZIP OpenVMS
          0x4f4c        Xceed original location extra field
          0x5356        AOS/VS (ACL)
          0x5455        extended timestamp
          0x554e        Xceed unicode extra field
          0x5855        Info-ZIP UNIX (original, also OS/2, NT, etc)
          0x6375        Info-ZIP Unicode Comment Extra Field
          0x6542        BeOS/BeBox
          0x7075        Info-ZIP Unicode Path Extra Field
          0x756e        ASi UNIX
          0x7855        Info-ZIP UNIX (new)
          0xa220        Microsoft Open Packaging Growth Hint
          0xfd4a        SMS/QDOS

<?php
function detect_encoding($zipfile_name){
    $zip = new ZipArchive;
    $res = $zip->open($zipfile_name);
    if(true !== $res)
        throw new Exception('Can Not Open Zip File '.$res);

    $encoding = "UTF-8";
    $controller = array("ASCII","UTF-8", "GB2312", "GBK", "BIG5");

    for($i = 0; $i < $zip->numFiles; ++ $i){
        $entry = $zip->getNameIndex($i);
        $encoding = mb_detect_encoding($entry, $controller);
        if( "UTF-8" !== $encoding)
            $entry = iconv($encoding, "UTF-8", $entry);
        echo $entry." ---> ".$encoding.chr(10);
    }
    $zip->close();
}
detect_encoding($argv[1]);
?>