protected function runCommand($command)
    {
        $return_var = 1;
        exec($command, $this->output, $return_var);
        return (bool)($return_var === 0);
    }
protected function runCommand($command)
    {
        $return_var = 1;
        exec($command, $this->output, $return_var);
        return (bool)($return_var === 0);
    }
protected function runCommand ( $ command ) { $ return_var = 1 ; exec ( $ command , $ this -> output , $ return_var ) ; return ( bool ) ( $ return_var === 0 ) ; }
Runs a command and converts the exit code to a boolean
@param $command
@return bool
Runs a command and converts the exit code to a boolean