<?php
class a { protected $a = 10; protected $c;}
class b { protected $b; public function setA($a){$this->b = $a;return $this;}}
var_dump(unserialize(serialize((new b)->setA(new a), true)));
Fatal error: Uncaught ArgumentCountError: serialize() expects exactly 1 argument, 2 given in /in/ON54R:7
Stack trace:
#0 /in/ON54R(7): serialize(Object(b), true)
#1 {main}
thrown in /in/ON54R on line 7
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
Fatal error: Uncaught ArgumentCountError: serialize() expects exactly 1 argument, 2 given in /in/ON54R:7
Stack trace:
#0 /in/ON54R(7): serialize(Object(b), true)
#1 {main}
thrown in /in/ON54R on line 7
Process exited with code 255.