PHP 關聯數組，打印從 4 到 8 的元素

Question

我的目標是編寫一個 php 腳本，在關聯數組中打印從 4（“Adam => 16”）到 8（“Kunegunda”=> 42，）的元素。我的代碼打印所有元素。我必須改變什么？

$ages = array("Marek" => 22, "Jeacek" => 32, "Michał" => 28, "Adam" => 16, "Adrian" => 25, "Bolesław" => 9, "Jeremi" => 28, "Kunegunda" => 42, "Anna" => 40, "Elżbieta" => 96);

foreach($ages as $x => $x_value) {
  echo "Name = " . $x . ", Age = " . $x_value;
  echo "<br>";
}
?>

Answer 1

從你的數組中獲取一個切片並循環拋出它

foreach(array_slice($ages, 4, 4) as $x => $x_value) {
  echo "Name = " . $x . ", Age = " . $x_value;
  echo "<br>";
}

array_slice 將從您的舊數組返回一個新數組（從第 4 項向前 4 步，因此從 4 到 8）然后 foreach 將僅循環切片（從 4 到 8）