better coding standards

[banana.git] / include / encoding.inc.php

<?php
/********************************************************************************
* include/encoding.inc.php : decoding subroutines
* --------------------------
*
* This file is part of the banana distribution
* Copyright: See COPYING files that comes with this distribution
********************************************************************************/

/** Decodes quoted-printable and UTF8 headers
 * @param STRING $_value string to decode
 */

function headerDecode($_value) {
    if (eregi('=\?.*\?.\?.*\?=',$_value)) { // is there anything encoded ?
        if (eregi('=\?(.*)\?Q\?.*\?=',$_value,$charset)) {  // quoted-printable decoding
            $result1 = eregi_replace('(.*)=\?.*\?Q\?(.*)\?=(.*)','\1',$_value);
            $result2 = eregi_replace('(.*)=\?.*\?Q\?(.*)\?=(.*)','\2',$_value);
            $result3 = eregi_replace('(.*)=\?.*\?Q\?(.*)\?=(.*)','\3',$_value);
            $result2 = str_replace("_"," ",quoted_printable_decode($result2));
            if ($charset[1] == "UTF-8") {
                $result2 = utf8_decode($result2);
            }
            $newvalue = $result1.$result2.$result3;
        }
        if (eregi('=\?(.*)\?B\?.*\?=',$_value,$charset)) {  // base64 decoding
            $result1 = eregi_replace('(.*)=\?.*\?B\?(.*)\?=(.*)','\1',$_value);
            $result2 = eregi_replace('(.*)=\?.*\?B\?(.*)\?=(.*)','\2',$_value);
            $result3 = eregi_replace('(.*)=\?.*\?B\?(.*)\?=(.*)','\3',$_value);
            $result2 = base64_decode($result2);
            if ($charset[1] == "UTF-8") {
                $result2 = utf8_decode($result2);
            }
            $newvalue = $result1.$result2.$result3;
        }
        if (!isset($newvalue)) { // nothing of the above, must be an unknown encoding...
            $newvalue = $_value;
        } else {
            $newvalue=headerDecode($newvalue);  // maybe there are more encoded
        }
        return($newvalue);                    // parts
    } else {   // there wasn't anything encoded, return the original string
        return($_value);
    }
}
?>