Tag Archives: OOP

PHP5: Quick on calling a parents constructor

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Using OOP there comes a need to call the constructor of a parent class, this is not hard to do

class TestParent {
    public function __construct() {
        var_dump('blah');
    }
}
 
class TestChild extends TestParent {
    public function __construct() {
        parent::__construct();
    }
}
 
$a = new TestChild(); //Output will be: string 'blah' (length=4)

In PHP4 this would have looked like (this still works in PHP5)

class TestParent {
    public function TestParent() {
        var_dump('blah');
    }
}
 
class TestChild extends TestParent {
    public function TestChild() {
        parent::TestParent();
    }
}
$a = new TestChild(); //Output will be: string 'blah' (length=4)