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<?php
 
$arr = array(1, 2, 3, 4);
 
foreach ($arr as &$value) {
    $value = $value * 2;
}
 
$value = 1024;
 
var_dump($arr);

Success #stdin #stdout 0s 52488KB

stdin

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Standard input is empty

stdout

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array(4) {
  [0]=>
  int(2)
  [1]=>
  int(4)
  [2]=>
  int(6)
  [3]=>
  &int(1024)
}

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