如何在PHP中的另一个关联数组中复制一个关联数组

Question

Can anyone tell me how to store an array of associative arrays? I thought this code would work, but it's not. I tried researching it but couldn't find an answer.

foreach($rows as $row) {
    // Some SQL...
    if ($stmt->execute()) {
        while ($row2 = $stmt->fetch(PDO::FETCH_ASSOC)) {
            $row['NestedResults'][] = $row2;
        }
    }
}

foreach ($rows as $row) {
    foreach ($row['NestedResults'] as $results) {
        echo $results['Item'] . '<br>';
    }
}

PS: I know I shouldn't loop SQL statements like that, but it's a special case.

Answer 1

在你第一次foreach循环，你需要通过$row通过引用变量，否则你只是修改从元素的副本$rows存储在$row ：

foreach($rows as &$row)

Answer 2

do you think it is workable to put the second loop inside the first one as below?

$row['NestedResults'][] = $row2; foreach ($row['NestedResults'] as $results) { echo $results['Item'] . '<br>'; }

not 100% sure...