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<?php $my_array = range(0,3); foreach ($my_array as $my_value) { echo $my_value . PHP_EOL; } foreach ($my_array as &$my_value) { $my_value += 42; } print_r($my_array);
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0 1 2 3 Array ( [0] => 42 [1] => 43 [2] => 44 [3] => 45 )