代码示例：
$car = new car();
$car->startLog();
trait trait_class {
public function startLog(){
echo "start log";
}
public function endLog(){
echo "end log";
}
}
class car {
use trait_class;
}
输出结果：start log
原文：http://www.cnblogs.com/maggie94/p/6730125.html