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boa constructor
boa constructor

the copy constructor's counterpart in the zend api, the destructor zval_dtor(), does the opposite of the constructor.
the copy constructor' s counterpart in the zend api, the destructor zval_dtor(), does the opposite of the constructor.

the class constructor or methods whose names start with an underscore character (_), which are considered private to the aggregated class, are always excluded.
the class constructor or methods whose names start with an underscore character (_), which are considered private to the aggregated class, are always excluded.

aggregates all methods defined in a class to an existing object, except for the class constructor, or methods whose names start with an underscore character (_) which are considered private to the aggregated class.
aggregates all methods defined in a class to an existing object, except for the class constructor, or methods whose names start with an underscore character (_) which are considered private to the aggregated class.

if you omit the call to the copy constructor in this example, both parameter and return_value would point to the same internal data, meaning that return_value would be an illegal additional reference to the same data structures. whenever changes occurred in the data that parameter points to, return_value might be affected. thus, in order to create separate copies, the copy constructor must be used.
if you omit the call to the copy constructor in this example, both parameter and return_value would point to the same internal data, meaning that return_value would be an illegal additional reference to the same data structures.