--TEST-- Bug #20273 Mail_mimePart::encodeHeader() and TAB character --SKIPIF-- --FILE-- <?php include("Mail/mimePart.php"); $refs = "<test@domain.tld>\t<test2@domain.tld>"; $mime = new Mail_mimePart(); echo $mime->encodeHeader('References', $refs); ?> --EXPECT-- <test@domain.tld> <test2@domain.tld>