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<?php define('NULL_CONSTANT', null); function bla(array $arr = NULL_CONSTANT) { var_dump($arr); } bla(); bla(null); bla(array());
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: bla(): Argument #1 ($arr) must be of type array, null given, called in /in/BdEX6 on line 9 and defined in /in/BdEX6:5 Stack trace: #0 /in/BdEX6(9): bla() #1 {main} thrown in /in/BdEX6 on line 5
Process exited with code 255.
Output for 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
NULL NULL array(0) { }
Output for 5.3.28 - 5.3.29, 5.4.20 - 5.4.45, 5.5.24 - 5.5.35
Fatal error: Default value for parameters with array type hint can only be an array or NULL in /in/BdEX6 on line 5
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.27, 5.4.0 - 5.4.19
Fatal error: Default value for parameters with array type hint can only be an array or NULL in /in/3Zik8 on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/3Zik8 on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/3Zik8 on line 5
Process exited with code 255.
Output for 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/3Zik8 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/3Zik8 on line 5
Process exited with code 255.
Output for 4.3.0
Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/BdEX6 on line 5
Process exited with code 255.

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