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run code in 300+ PHP versions simultaneously
<?php class X implements Serializable { public $v = 'adf'; public function serialize() { return serialize($this->v); } public function unserialize($in) { $this->v = unserialize($in); } } class Y { public $v = 'adf'; } var_dump( serialize(new X()), serialize(new Y()) );
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Deprecated: X 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/u8aet on line 3 string(23) "C:1:"X":10:{s:3:"adf";}" string(30) "O:1:"Y":1:{s:1:"v";s:3:"adf";}"
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
string(23) "C:1:"X":10:{s:3:"adf";}" string(30) "O:1:"Y":1:{s:1:"v";s:3:"adf";}"

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