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@ 2023-08-21T13:26:16Z

<?php

class A {}
class B {}

class C {
    public function __construct(
        protected readonly A|B $b
    ) {
        if ($this->b instanceof A) {
            trigger_error('A is deprecated, pass B instead', E_USER_DEPRECATED);
            $this->b = new B();
        }
        var_dump($this->b);
    }
}

new C(new A());
new C(new B());

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
trigger_error: documentation ( source)

preferences:dark modelive preview

46.6 ms | 405 KiB | 5 Q