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<?php $a = ['asdf','foo','bar']; $f = array_map($a, 'strtoupper'); var_dump($f);
Output for 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback or null, array callback must have exactly two members in /in/eNq0Q:4 Stack trace: #0 /in/eNq0Q(4): array_map(Array, 'strtoupper') #1 {main} thrown in /in/eNq0Q on line 4
Process exited with code 255.
Output for 8.1.0 - 8.1.27
Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback or null, array must have exactly two members in /in/eNq0Q:4 Stack trace: #0 /in/eNq0Q(4): array_map(Array, 'strtoupper') #1 {main} thrown in /in/eNq0Q on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.30
Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback, array must have exactly two members in /in/eNq0Q:4 Stack trace: #0 /in/eNq0Q(4): array_map(Array, 'strtoupper') #1 {main} thrown in /in/eNq0Q on line 4
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 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, array must have exactly two members in /in/eNq0Q on line 4 NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/eNq0Q 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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/eNq0Q on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/eNq0Q on line 3
Process exited with code 255.

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