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@ 2020-04-07T13:37:36Z

<?php

class A
{
    public string $a;
    public string $b = '123';
    
    public function __sleep()
    {
        return ['b'];
    }
}

$a = unserialize(serialize(new A()));

echo $a->a;

Output
Performance
VLD
References
Branches

unserialize: documentation ( source)
serialize: documentation ( source)

preferences:dark modelive preview

63.54 ms | 402 KiB | 5 Q