<?php
function paginate($array, $page_number, $page_size) {
    // 計算要跳過的元素數(shù)量
    $offset = ($page_number - 1) * $page_size;
    // 提取指定范圍的元素
    return array_slice($array, $offset, $page_size);
}

// 假設(shè)我們有一個包含 100 個元素的數(shù)組
$array = range(1, 100);

// 每頁顯示 10 個元素
$page_size = 10;
// 當(dāng)前頁碼為 2
$page_number = 2;

// 獲取第二頁數(shù)據(jù)
$paginated_array = paginate($array, $page_number, $page_size);

// 打印分頁后的數(shù)組
print_r($paginated_array);

<?php
class MyIterator implements Iterator {
    private $array;
    private $page_number;
    private $page_size;
    private $current_index;

    public function __construct($array, $page_number, $page_size) {
        $this->array = $array;
        $this->page_number = $page_number;
        $this->page_size = $page_size;
        $this->current_index = 0;
    }

    public function rewind() {
        $this->current_index = 0;
    }

    public function key() {
        return $this->current_index;
    }

    public function current() {
        return $this->array[$this->current_index];
    }

    public function next() {
        $this->current_index++;
    }

    public function valid() {
        return $this->current_index < $this->page_size;
    }
}

// 假設(shè)我們有一個包含 100 個元素的數(shù)組
$array = range(1, 100);

// 每頁顯示 10 個元素
$page_size = 10;
// 當(dāng)前頁碼為 2
$page_number = 2;

// 創(chuàng)建迭代器
$iterator = new MyIterator($array, $page_number, $page_size);

// 遍歷迭代器中的元素
foreach ($iterator as $element) {
    echo $element . "\n";
}