如何通过使用codeigniter动态创建数组并将数组中的值分解为单独的列

// 创建一个空数组
$data = array();

// 添加值到数组中
$data[] = array('name' => 'John', 'age' => 25, 'city' => 'New York');
$data[] = array('name' => 'Jane', 'age' => 30, 'city' => 'London');
$data[] = array('name' => 'Bob', 'age' => 35, 'city' => 'Paris');

// 创建一个空数组来存储分解后的列
$names = array();
$ages = array();
$cities = array();

// 遍历数组并将值分解到各个列中
foreach ($data as $item) {
    $names[] = $item['name'];
    $ages[] = $item['age'];
    $cities[] = $item['city'];
}

// 打印分解后的列
echo "Names: " . implode(', ', $names) . "<br>";
echo "Ages: " . implode(', ', $ages) . "<br>";
echo "Cities: " . implode(', ', $cities) . "<br>";