Frequently Asked Questions

Both Swow and Swoole enabled 

Coroutine module is incompatible with some extensions that setup exit user opcode handler in Unknown on line 0

Swow and Swoole provides similar kind of facilities, so they are exclusive, please remove Swow or Swoole from your php.ini

Please re-run your program with "-e" option when using SDB 

> attach 3
Error: Please re-run your program with "-e" option in path/to/vendor/swow/swow/lib/swow-library/src/Debug/Debugger/Debugger.php:0

Append -e argument in php command line like: php -e your_file.php。

When -e is enabled, PHP will call extension registered OPCode hanlder, this may harm performance in usual.

“PHP Warning: PHP Startup: Swow pdo_pgsql hook not enabled” after Swow enabled

If you have Swow compiled with pgsql support, but no pgsql environment when starting:

  • PDO extension is enabled: “pdo extension not enabled”
  • No libpq found: “libpq.so/libpq.5.dylib/lipq.dll not found” “libpq is too old”

Then you will see this warning, and pdo_pgsql hook will not work.

If you need this support:

If you don’t need this support, you can add an ini configuration:

swow.hook_pdo_pgsql = Off;