Php。向数组中添加新列，但会使结果加倍

<?php
// 原始数组
$originalArray = array(
    array('name' => 'John', 'age' => 25),
    array('name' => 'Jane', 'age' => 30),
    array('name' => 'Tom', 'age' => 20)
);

// 创建结果数组
$resultArray = array();

// 遍历原始数组
foreach ($originalArray as $key => $value) {
    // 将新列添加到每个元素中
    $value['doubled_age'] = $value['age'] * 2;

    // 将元素添加到结果数组中
    $resultArray[$key] = $value;
}

// 打印结果数组
print_r($resultArray);
?>

Array
(
    [0] => Array
        (
            [name] => John
            [age] => 25
            [doubled_age] => 50
        )

    [1] => Array
        (
            [name] => Jane
            [age] => 30
            [doubled_age] => 60
        )

    [2] => Array
        (
            [name] => Tom
            [age] => 20
            [doubled_age] => 40
        )

)