private function exec($command, $background = false) {

		exec(escapeshellcmd($command) . ($background === true ?  ' > /dev/null &' : ''), $output);

		return $output;
	}
private function exec($command, $background = false) {

		exec(escapeshellcmd($command) . ($background === true ?  ' > /dev/null &' : ''), $output);

		return $output;
	}
private function exec ( $ command , $ background = false ) { exec ( escapeshellcmd ( $ command ) . ( $ background === true ? ' > /dev/null &' : '' ) , $ output ) ; return $ output ; }
Runs system command
@param string $command
@param boolean $background
@return string
Runs system command