class Page

{

public $limit;	//存儲limit條件

public $allPage;	//存儲總頁數

public $current;	//存儲當前頁

public $total;	//存儲總條數

public function __construct($total, $num = 5)

{

//計算總頁數

$this->allPage = ceil($total/$num);

//處理當前頁

$this->current();

//3,3  6,3

$this->limit = (($this->current-1)*$num).','.$num;

$this->total = $total;

}

protected function current()

{

$p = isset($_GET['p']) ? $_GET['p'] : 1;

// $p = max(1, $p);	//最小不能小于1

// $p = min($p, $this->allPage);//最大不能超過總頁數

if ($p < 1) $p = 1;

if ($p > $this->allPage) $p = $this->allPage;

$this->current = (int)$p;

}

public function show()

{

$first = $end = $pre = $next = $_GET;//處理上一頁$pre['p'] = $this->current - 1;

$preStr = http_build_query($pre);

//處理下一頁$next['p'] = $this->current + 1;$nextStr = http_build_query($next);

//處理首頁$first['p'] = 1;

$firstStr = http_build_query($first);

//處理尾頁$end['p'] = $this->allPage;

$endStr = http_build_query($end);

$str = "共{$this->total}條數據 第{$this->current}/{$this->allPage}頁 | ";

$str .= "首頁| ";$str .= "上一頁| ";$str .= "下一頁| ";$str .= "尾頁";

return $str;

    }

}

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