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<?php $arrayOb = new \ArrayObject(range(1, 20)); var_dump(array_key_exists(4, $arrayOb));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, ArrayObject given in /in/cm8jZ:5 Stack trace: #0 {main} thrown in /in/cm8jZ on line 5
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Deprecated: array_key_exists(): Using array_key_exists() on objects is deprecated. Use isset() or property_exists() instead in /in/cm8jZ on line 5 bool(true)
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 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
bool(true)
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/cm8jZ on line 3 bool(true)
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/cm8jZ on line 3 Fatal error: Cannot instantiate non-existent class: arrayobject in /in/cm8jZ on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/cm8jZ on line 3 Fatal error: Cannot instantiate non-existent class: arrayobject in /in/cm8jZ on line 3

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