The behaviour of these functions is affected by settings in php.ini.
INI_ALL
INI_SYSTEM
Here's a short explanation of the configuration directives.
swoole.enable_library
Enable/disable the extension's built-in library.
swoole.enable_fiber_mock
Enable/disable use the xdebug extension to debug Swoole programs.
swoole.enable_preemptive_scheduler
Prevent some coroutines from consuming CPU time for too long in a tight loop (10ms of CPU time), preventing other coroutines from getting scheduled.
swoole.display_errors
Enable/disable displaying Swoole error messages.
swoole.use_shortname
Enable/disable short aliases.
swoole.unixsock_buffer_size
Set the size of the Socket buffer for inter-process communication.