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<?php $input = array( array( 'username' => 'matt' ) ); print_r ($input); print_r(', ', array_map(function ($entry) { return $entry['username']; }, $input));
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => Array ( [username] => matt ) ) Fatal error: Uncaught TypeError: print_r(): Argument #2 ($return) must be of type bool, array given in /in/a2SkH:8 Stack trace: #0 /in/a2SkH(8): print_r(', ', Array) #1 {main} thrown in /in/a2SkH on line 8
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Array ( [0] => Array ( [username] => matt ) ) Fatal error: Uncaught TypeError: print_r(): Argument #2 ($return) must be of type bool, array given in /in/a2SkH:10 Stack trace: #0 /in/a2SkH(10): print_r(', ', Array) #1 {main} thrown in /in/a2SkH on line 10
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Array ( [0] => Array ( [username] => matt ) ) Warning: print_r() expects parameter 2 to be bool, array given in /in/a2SkH on line 10
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Array ( [0] => Array ( [username] => matt ) ) Warning: print_r() expects parameter 2 to be boolean, array given in /in/a2SkH on line 10
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, expecting ')' in /in/a2SkH on line 8
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, expecting ')' in /in/a2SkH on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/a2SkH on line 8
Process exited with code 255.

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