3v4l.org

run code in 300+ PHP versions simultaneously
<?php class huh extends ArrayObject implements Serializable { public function serialize() { return serialize($this->getIterator()); } public function unserialize($data) { $this->exchangeArray($data); } } $value = new huh(); $value[] = $value; echo serialize($value);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of huh::unserialize($data) should either be compatible with ArrayObject::unserialize(string $data): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/bHd7l on line 6 Deprecated: Return type of huh::serialize() should either be compatible with ArrayObject::serialize(): string, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/bHd7l on line 5 O:3:"huh":4:{i:0;i:0;i:1;a:1:{i:0;r:1;}i:2;a:0:{}i:3;N;}
Output for 7.4.6 - 7.4.33, 8.0.0 - 8.0.30
O:3:"huh":4:{i:0;i:0;i:1;a:1:{i:0;r:1;}i:2;a:0:{}i:3;N;}
Output for 7.4.0 - 7.4.5
O:3:"huh":3:{i:0;i:0;i:1;a:1:{i:0;r:1;}i:2;a:0:{}}
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
C:3:"huh":45:{C:13:"ArrayIterator":19:{x:i:0;r:1;;m:a:0:{}}}
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
C:3:"huh":52:{C:13:"ArrayIterator":26:{x:i:16777216;r:1;;m:a:0:{}}}
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29

Process exited with code 139.
Output for 5.0.5
Fatal error: Interface 'Serializable' not found in /in/bHd7l on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'Serializable' not found in /in/bHd7l 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/bHd7l 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/bHd7l on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/bHd7l on line 3
Process exited with code 255.

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