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<?php $input = ["a", "b"]; function search($input) { $result = $input; foreach($input as $a) { foreach($input as $b) { $result []= $a + $b; } } //return array_unique($result); return $result; } var_dump(search($input));
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: Unsupported operand types: string + string in /in/SO78e:12 Stack trace: #0 /in/SO78e(20): search(Array) #1 {main} thrown in /in/SO78e on line 12
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: A non-numeric value encountered in /in/SO78e on line 12 Warning: A non-numeric value encountered in /in/SO78e on line 12 Warning: A non-numeric value encountered in /in/SO78e on line 12 Warning: A non-numeric value encountered in /in/SO78e on line 12 Warning: A non-numeric value encountered in /in/SO78e on line 12 Warning: A non-numeric value encountered in /in/SO78e on line 12 Warning: A non-numeric value encountered in /in/SO78e on line 12 Warning: A non-numeric value encountered in /in/SO78e on line 12 array(6) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> int(0) [3]=> int(0) [4]=> int(0) [5]=> int(0) }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
array(6) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> int(0) [3]=> int(0) [4]=> int(0) [5]=> int(0) }
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/SO78e 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/SO78e on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/SO78e on line 3
Process exited with code 255.

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