Foreach referential variable

example.php

<?php

$original = [
    [
        'id' => 1,
        'name' => 'foo'
    ],
    [
        'id' => 2,
        'name' => 'bar'
    ]
];

$data = $original;

print_r($data);

echo "<p>";

/**
 * Array ( [id] => 1 [name] => foo )
 * Array ( [id] => 2 [name] => bar )
 */
foreach ($data as $index => $item) {
    $data[$index]['name'] = $item['name'] . ' something';
    
    print_r($item);
    
    echo "<br>";
}

$data = $original;

echo "<p>";

/**
 * Array ( [id] => 1 [name] => foo something )
 * Array ( [id] => 2 [name] => bar something )
 */
foreach ($data as $index => &$item) {
    $data[$index]['name'] = $item['name'] . ' something';
    
    print_r($item);
    
    echo "<br>";
}

?>