Support a special $shell parameter

[jigarius]

Currently, for running shell commands, one has to run proc_open(), proc_close(), etc. It'd be great to have a special $shell variable, which would have a method execute($command) to easily execute commands.

function shell_example($shell) {
  $shell->execute('docker compose exec main sh');
}

[jigarius]

Or maybe passthru() should be able to do the trick? If yes, then the shell example needs to be simplified.