By execution model I imagine you mean the whole single-request single-response thing? To which I can point you to something like https://reactphp.org/ https://r

By execution model I imagine you mean the whole single-request single-response thing? To which I can point you to something like https://reactphp.org/ https://reactphp.org/ and https://github.com/php-pm/php-pm https://github.com/php-pm/php-pm, which are great projects that enable a different execution model for PHP.