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<?php $a = "Hello"; $b = function() { echo ",world"; }; $arr = [$a,$b]; array_map($arr, function() { echo $this; });
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback or null, second array member is not a valid method in /in/2EVX3:9 Stack trace: #0 /in/2EVX3(9): array_map(Array, Object(Closure)) #1 {main} thrown in /in/2EVX3 on line 9
Process exited with code 255.
Output for 8.1.0 - 8.1.28
Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback or null, second array member is not a valid method in /in/2EVX3:11 Stack trace: #0 /in/2EVX3(11): array_map(Array, Object(Closure)) #1 {main} thrown in /in/2EVX3 on line 11
Process exited with code 255.
Output for 8.0.0 - 8.0.30
Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback, second array member is not a valid method in /in/2EVX3:11 Stack trace: #0 /in/2EVX3(11): array_map(Array, Object(Closure)) #1 {main} thrown in /in/2EVX3 on line 11
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: array_map() expects parameter 1 to be a valid callback, second array member is not a valid method in /in/2EVX3 on line 11
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/2EVX3 on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/2EVX3 on line 5
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/2EVX3 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/2EVX3 on line 5
Process exited with code 255.

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