Are Parent constructors called implicitly inside a class constructor?
Câu trả lời Are Parent constructors called implicitly inside a class constructor?
In PHP, parent constructors are not called implicitly inside a class constructor. If you want to call a parent constructor within a child class, you need to do so explicitly using the parent::__construct() syntax. Here’s an example to illustrate this:
phpCopy
<?php
class ParentClass {
public function __construct() {
echo "Parent constructor called\n";
}
}
class ChildClass extends ParentClass {
public function __construct() {
// Explicitly calling the parent constructor
parent::__construct();
echo "Child constructor called\n";
}
}
// Creating an instance of ChildClass
$child = new ChildClass();
?>
Output:
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Parent constructor called
Child constructor called
