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Editorial Team
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Asked: 2026-05-25T02:16:49+00:00

For example: 1 $abc = new MyObj(); 2 $abc = new MyAnotherObj(); I assign

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For example:

1 $abc = new MyObj();
2 $abc = new MyAnotherObj();

I assign MyObj in the first line, and the second line will assign another object. Where does the object assigned in first line go? Is it still in memory, or somewhere else?

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1 Answer

  1. Editorial Team

    As soon as the second line executes, the first object will have its destructor called and will be deallocated. PHP’s GC does reference counting; when you overwrite the only reference to the MyObj instance, the number of references drops to zero and the GC destroys the object.

    Note that this would happen no matter what you assigned to $abc — you could have assigned "foobar" or 42 or null or even new MyObj() (a new instance of MyObj) and the old object will be destroyed.

    See this example on ideone.

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