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<?php $x = new ArrayObject(ArrayObject::STD_PROP_LIST); $x->a = 'abc'; echo ($s = $x->serialize()), "\n"; $x->unserialize($s); echo $x->serialize();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: ArrayObject::__construct(): Argument #1 ($array) must be of type array, int given in /in/vaXBv:3 Stack trace: #0 /in/vaXBv(3): ArrayObject->__construct(1) #1 {main} thrown in /in/vaXBv on line 3
Process exited with code 255.
Output for 7.0.20, 7.1.5 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught InvalidArgumentException: Passed variable is not an array or object in /in/vaXBv:3 Stack trace: #0 /in/vaXBv(3): ArrayObject->__construct(1) #1 {main} thrown in /in/vaXBv on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.14, 7.1.0
Fatal error: Uncaught InvalidArgumentException: Passed variable is not an array or object, using empty array instead in /in/vaXBv:3 Stack trace: #0 /in/vaXBv(3): ArrayObject->__construct(1) #1 {main} thrown in /in/vaXBv on line 3
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21
Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Passed variable is not an array or object, using empty array instead' in /in/vaXBv:3 Stack trace: #0 /in/vaXBv(3): ArrayObject->__construct(1) #1 {main} thrown in /in/vaXBv on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Fatal error: Undefined class constant 'STD_PROP_LIST' in /in/vaXBv on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected ')', expecting '(' in /in/vaXBv 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 ')', expecting '(' in /in/vaXBv on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'('' in /in/vaXBv on line 3
Process exited with code 255.

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