Filters...
- • transparently transform data read from or written to a stream
- • can be "stacked" into a pipeline
- • filter stacks can have any number of filtration steps
- • read and write operations can have separate filter stacks
PHP 5.x will feature a number of stock filters:
- • case folding
- • codeset conversion
- • Compression: zlib and bzip2
- • HTTP 1.1 chunk encoder/decoder
- • Crypto: mcrypt
