Examples of constructors and destructors in PHP

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Constructor function

Void _ _ construct ([mixed $args [, $...]])

PHP 5 allows developers to define a method in a class as a constructor. Classes with constructors call this method every time a new object is created, so it is ideal for doing some initialization work before using the object.

Note: if a constructor is defined in a subclass, the constructor of its parent class is not implicitly called. To execute the constructor of the parent class, you need to call parent::__construct () in the constructor of the subclass. If the subclass does not have a constructor defined, it inherits from the parent class like a normal class method (if it is not defined as private).

Example#1 uses the new standard constructor

The copy code is as follows: