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<?php $item = 0; $array = ['1', '10', '20', '40']; foreach ($array as &$item) { $item = $item + 10; } $item = 0; var_dump($array);
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
array(4) { [0]=> int(11) [1]=> int(20) [2]=> int(30) [3]=> &int(0) }
preferences:
238.47 ms | 404 KiB | 331 Q