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<?php class Test implements Serializable { public $test; public $test2; public function serialize() { $this->test = "cccc"; return serialize($this); } } $o = new Test(); $o->test = "aaaa"; $o->test2 = "bbbbb"; echo serialize($o);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Test implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in /in/lQV67 on line 3 Fatal error: Class Test contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Serializable::unserialize) in /in/lQV67 on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
Fatal error: Class Test contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Serializable::unserialize) in /in/lQV67 on line 3
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Class Test contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Serializable::unserialize) in /in/lQV67 on line 11
Process exited with code 255.

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