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<?php class A{ public $null = null; } $a = new A; $item = 'Null'; var_dump(isset($a->$item)); var_dump(array_key_exists($item, $a));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
bool(false) Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, A given in /in/lsUGW:9 Stack trace: #0 {main} thrown in /in/lsUGW on line 9
Process exited with code 255.
Output for 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
bool(false) Deprecated: array_key_exists(): Using array_key_exists() on objects is deprecated. Use isset() or property_exists() instead in /in/lsUGW on line 9 bool(false)
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 - 7.2.33, 7.3.0 - 7.3.33, 7.4.26
bool(false) bool(false)
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/lsUGW 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 T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/lsUGW on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/lsUGW on line 3
Process exited with code 255.

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