function encodeMimeHeader( $str )
{
if ( !$this->TextCodec )
{
$this->TextCodec = eZTextCodec::instance( $this->contentCharset(), $this->outputCharset() );
}
if ( function_exists( "mb_encode_mimeheader" ) )
{
$encoded = mb_encode_mimeheader( $str, $this->TextCodec->InputCharsetCode, "B", eZMail::lineSeparator() );
}
else
{
if ( 0 == preg_match_all( '/[\000-\010\013\014\016-\037\177-\377]/', $str, $matches ) )
return $str;
$maxlen = 75 - 7 - strlen( $this->TextCodec->InputCharsetCode );
$encoding = 'B';
$encoded = base64_encode( $str );
$maxlen -= $maxlen % 4;
$encoded = trim( chunk_split( $encoded, $maxlen, "\n" ) );
$encoded = preg_replace( '/^(.*)$/m', " =?".$this->TextCodec->InputCharsetCode."?$encoding?\\1?=", $encoded );
$encoded = trim( str_replace( "\n", eZMail::lineSeparator(), $encoded ) );
}
return $encoded;
}
