3v4l.org

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<?php $o = new ArrayObject(); if (array_key_exists('a', $o)) { echo "has-a"; } else { echo "NO-a"; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, ArrayObject given in /in/2kVLe:4 Stack trace: #0 {main} thrown in /in/2kVLe on line 4
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/2kVLe on line 4 NO-a
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33
NO-a
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Cannot instantiate non-existent class: arrayobject in /in/2kVLe on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: arrayobject in /in/2kVLe on line 3

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61.43 ms | 409 KiB | 5 Q