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<?php class A { protected $_sqlStatements; protected $sqlStatements; public function __sleep() { return ["\0*\0sqlStatements"]; } } class B extends A {} var_dump(serialize(new B));
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.15, 8.5.0 - 8.5.1
string(38) "O:1:"B":1:{s:16:"*sqlStatements";N;}"

preferences:
123.28 ms | 407 KiB | 5 Q