PHP 5 >= 5.6.0, PHP 7, PHP 8
phpdbg_exec - Attempts to set the execution context
phpdbg_exec( string$context ): string|bool
This function is currently not documented; only its argument list is available.
If the execution context was set previously it is returned. If the execution context was not set previously true is returned. If the request to set the context fails, false is returned, and an E_WARNING raised.