| Horde_Stream_Filter_Bin2hex | Stream filter class to convert binary data into hexadecimal. |
| Horde_Stream_Filter_Crc32 | Stream filter class to compute the CRC32 value of a string. |
| Horde_Stream_Filter_Eol | Stream filter class to convert EOL characters. |
| Horde_Stream_Filter_Htmlspecialchars | Stream filter class to pass data to htmlspecialchars() in chunks. |
| Horde_Stream_Filter_Null | Stream filter class to remove null (\0) values. |