# ob_deflatehandler

(PECL pecl_http:0.21.0-1.5.5)

ob_deflatehandler — Deflate output handler

### Description

string ob_deflatehandler ( string `$data` , int `$mode` )

For use with ob_start().

> Note: This output handler can only be used once.

The deflate output buffer handler can only be used once.

It conflicts with ob_gzhandler() and zlib.output_compression as well and should not be used after mbstring extension's mb_output_handler() and session extension's URL-Rewriter (AKA session.use_trans_sid).

### See Also

- ob_inflatehandler()
- ob_start()