How should the Directives for ZLib output compression be configured in the php.ini file?

To configure the Directives for ZLib output compression in the php.ini file, you need to set the zlib.output_compression directive to "On" and specify the desired compression level using the zlib.output_compression_level directive. This will enable output compression for all PHP scripts on the server.

zlib.output_compression = On
zlib.output_compression_level = 6