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<?php $a = array('e' => 22, 'r' => 66, 't' => 88); $b = array('t' => 65); print_r(array_merge($a, $b)); array_walk($a, function(&$value) { $value = 'e ' + $value; }); print_r($a);
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [e] => 22 [r] => 66 [t] => 65 ) Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /in/0ocqv:8 Stack trace: #0 [internal function]: {closure}(22, 'e') #1 /in/0ocqv(7): array_walk(Array, Object(Closure)) #2 {main} thrown in /in/0ocqv on line 8
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Array ( [e] => 22 [r] => 66 [t] => 65 ) Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /in/0ocqv:8 Stack trace: #0 [internal function]: {closure}(22, 'e') #1 /in/0ocqv(9): array_walk(Array, Object(Closure)) #2 {main} thrown in /in/0ocqv on line 8
Process exited with code 255.
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Array ( [e] => 22 [r] => 66 [t] => 65 ) Warning: A non-numeric value encountered in /in/0ocqv on line 8 Warning: A non-numeric value encountered in /in/0ocqv on line 8 Warning: A non-numeric value encountered in /in/0ocqv on line 8 Array ( [e] => 22 [r] => 66 [t] => 88 )
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20
Array ( [e] => 22 [r] => 66 [t] => 65 ) Array ( [e] => 22 [r] => 66 [t] => 88 )
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/0ocqv on line 7
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/0ocqv on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/0ocqv on line 7
Process exited with code 255.

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