Installing/Configuring
PHP Manual

Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

mongodb Configure Options
Name Default Changeable Changelog Comments
mongodb.debug "" PHP_INI_ALL Only available for the PHP driver, and not the HHVM one

Here's a short explanation of the configuration directives.

mongodb.debug string

Store full activity debug log in this directory or stream. The special value "stderr" can be provided to write to STDERR.

Note:

Not available for HHVM


Installing/Configuring
PHP Manual