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run code in 300+ PHP versions simultaneously
<?php class Record implements Serializable { public $array = array(1, 2, 5, 6); public $object; public function __construct() { $this->object = new StdClass(); $this->object->property = 'wowo'; } public function serialize() { } public function unserialize() { } } $object = new Record(); var_dump(serialize($object));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Declaration of Record::unserialize() must be compatible with Serializable::unserialize(string $data) in /in/H6ij3 on line 20
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Fatal error: Declaration of Record::unserialize() must be compatible with Serializable::unserialize($serialized) in /in/H6ij3 on line 20
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of Record::unserialize() must be compatible with Serializable::unserialize($serialized) in /in/H6ij3 on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Fatal error: Declaration of Record::unserialize() must be compatible with Serializable::unserialize($serialized) in /in/H6ij3 on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Fatal error: Declaration of Record::unserialize() must be compatible with that of Serializable::unserialize() in /in/H6ij3 on line 4
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Fatal error: Declaration of Record::unserialize() must be compatible with that of Serializable::unserialize() in /in/H6ij3 on line 3
Process exited with code 255.
Output for 5.0.5
Fatal error: Interface 'Serializable' not found in /in/H6ij3 on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'Serializable' not found in /in/H6ij3 on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/H6ij3 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/H6ij3 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/H6ij3 on line 3
Process exited with code 255.

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