Phan Demo - PHP 84, Phan v6-dev

Interface-test.php

<?php

interface Interface2 {
    
}

interface Interface1 extends Interface2 {
    public function someMethod1();
}

class Class1 implements Interface1{
    public function someMethod1() {
        echo "Hello there";
    }
}

class Class2 {
    protected Interface2 $my_internal_instance;
    
    public function __construct() {
        $this->my_internal_instance = new Class1();
    }
    
    public function someMethod1() {
        return $this->my_internal_instance->someMethod1();
    }
}

class Class4 implements Interface2{
    
}
class Class3 extends Class2 {
    public function setWrong() {
        $this->my_internal_instance = new Class4();
    }
}
$instance = new Class3();
$instance->setWrong();
$instance->someMethod1();

phan-demo.json

{
  "phpVersion": "84",
  "phanVersion": "v6-dev",
  "astVersion": "1.1.3",
  "plugins": "310592423266",
  "fileOrder": [
    "Interface-test.php"
  ]
}