<?php
$text = <<<EOD
To: fred@example.com
hello, this is some text hello.
blah blah blah.
begin 644 test.txt
/=&AI<R!I<R!A('1E<W0*
`
end
EOD;
$fp = tmpfile();
fwrite($fp, $text);
$data = mailparse_uudecode_all($fp);
echo "BODY\n";
readfile($data[0]["filename"]);
echo "UUE ({$data[1]['origfilename']})\n";
readfile($data[1]["filename"]);
// Очищаем
unlink($data[0]["filename"]);
unlink($data[1]["filename"]);
?>
Результат выполнения приведённого примера:
BODY
To: fred@example.com
hello, this is some text hello.
blah blah blah.
UUE (test.txt)
this is a test