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<?php $array = [ ['a' => 1, 'b' => 2], ['a' => 2, 'b' => 2] ]; $data = new stdClass(); $data->count = 0; $data->a = 0; $data->b = 0; $cb = function($value, $key, &$data) { $data->count = $data->count + 1; $data->a = $data->a + $value['a']; $data->b = $data->b + $value['b']; }; array_walk($array, $cb, $data); var_dump($data);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: {closure}(): Argument #3 ($data) must be passed by reference, value given in /in/pYepQ on line 19 Warning: {closure}(): Argument #3 ($data) must be passed by reference, value given in /in/pYepQ on line 19 object(stdClass)#1 (3) { ["count"]=> int(2) ["a"]=> int(3) ["b"]=> int(4) }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: {closure}(): Argument #3 ($data) must be passed by reference, value given in /in/pYepQ on line 19 Warning: {closure}(): Argument #3 ($data) must be passed by reference, value given in /in/pYepQ on line 19 object(stdClass)#1 (3) { ["count"]=> int(2) ["a"]=> int(3) ["b"]=> int(4) }
Output for 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 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
object(stdClass)#1 (3) { ["count"]=> int(2) ["a"]=> int(3) ["b"]=> int(4) }
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/pYepQ 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/pYepQ on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/pYepQ on line 3
Process exited with code 255.
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