class?SubObject
{
????static?$instances?=?0;
????public?$instance;
????public?function?__construct()?{
????????$this->instance?=?++self::$instances;
????}
????public?function?__clone()?{
????????$this->instance?=?++self::$instances;
????}
}
class?MyCloneable
{
????public?$object1;
????public?$object2;
????function?__clone()
????{
??????
????????//?強(qiáng)制復(fù)制一份this->object，?否則仍然指向同一個(gè)對象
????????$this->object1?=?clone?$this->object1;
????}
}
$obj?=?new?MyCloneable();
$obj->object1?=?new?SubObject();
$obj->object2?=?new?SubObject();
$obj2?=?clone?$obj;
print("Original?Object:\n");
print_r($obj);
print("Cloned?Object:\n");
print_r($obj2);
能給我講講這段代碼是怎樣運(yùn)行嗎？
錯(cuò)過了年華
2017-04-05 23:23:07
