PHP 그룹화 배열의 주요 반복 기술

$groupedArray = [
    'group1' => ['item1', 'item2'],
    'group2' => ['item3', 'item4'],
];

foreach ($groupedArray as $key => $value) {
    echo "Key: $key, Value: " . implode(', ', $value) . "\n";
}

Key: group1, Value: item1, item2
Key: group2, Value: item3, item4

$keys = array_keys($groupedArray);

foreach ($keys as $key) {
    echo "Key: $key, Value: " . implode(', ', $groupedArray[$key]) . "\n";
}

$pattern = "/: /";
foreach ($groupedArray as $keyValuePair) {
    list($key, $value) = preg_split($pattern, $keyValuePair);
}

$users = [
    'user1' => ['name' => 'John', 'age' => 30],
    'user2' => ['name' => 'Jane', 'age' => 25],
];

foreach ($users as $key => $value) {
    echo $value['name'] . "\n";
}

John
Jane

foreach ($users as $key => $value) {
    if ($value['age'] > 27) {
        echo "User " . $key . "\n";
    }
}

User user1