class Page { public $limit; //存储limit条件 public $allPage; //存储总页数 public $current; //存储当前页 public $total; //存储总条数 public function __construct($total, $num = 5) { //计算总页数 $this->allPage = ceil($total/$num); //处理当前页 $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, $this->allPage);//最大不能超过总页数 if ($p < 1) $p = 1; if ($p > $this->allPage) $p = $this->allPage; $this->current = (int)$p; } public function show() { $first = $end = $pre = $next = $_GET;//处理上一页$pre['p'] = $this->current - 1; $preStr = http_build_query($pre); //处理下一页$next['p'] = $this->current + 1;$nextStr = http_build_query($next); //处理首页$first['p'] = 1; $firstStr = http_build_query($first); //处理尾页$end['p'] = $this->allPage; $endStr = http_build_query($end); $str = "共{$this->total}条数据 第{$this->current}/{$this->allPage}页 | "; $str .= "首页| ";$str .= "上一页| ";$str .= "下一页| ";$str .= "尾页"; return $str; } }
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