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<?php function arrayTest($key) { return '1' + $key; } $arr = array('a', 'b', 'c', 'd'); $arrTwo = array_walk($arr, 'arrayTest'); print_r($arr); print_r($arrTwo);
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/RNSEI:4 Stack trace: #0 [internal function]: arrayTest('a', 0) #1 /in/RNSEI(9): array_walk(Array, 'arrayTest') #2 {main} thrown in /in/RNSEI on line 4
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/RNSEI on line 4 Warning: A non-numeric value encountered in /in/RNSEI on line 4 Warning: A non-numeric value encountered in /in/RNSEI on line 4 Warning: A non-numeric value encountered in /in/RNSEI on line 4 Array ( [0] => a [1] => b [2] => c [3] => d ) 1
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
Array ( [0] => a [1] => b [2] => c [3] => d ) 1
preferences:
239.6 ms | 404 KiB | 358 Q