<?php

class A
{
    public function __construct($foo)
    {
        echo $foo;
    }
}
class B extends A
{
    public function __construct($foo, $bar)
    {
        parent::__construct($foo);
        echo PHP_EOL, $bar, PHP_EOL;
    }
}

$b = new B('foo bar lol', 'lorem ipsum dolor');