今天要做一個用smarty實現的分頁,因爲連接數據庫的類,還有一點兒小問題,那就先發佈一個PHP的分頁類吧!
下面是分頁類的代碼,老師常說寫代碼要有註釋,我也寫一次!
<?php
class page{private $count; //記錄的總條數
private $page; //當前頁數
private $pagesize; //每頁顯示多少條記錄
private $pagenum; //總頁數
private $offset; //limit 使用的參數
function __construct($count,$page=1,$pagesize=5){
//爲成員屬性賦值,其中$pagenum,$offset調用內部方法賦值
$this->count=$count;
$this->page=$page;
$this->pagesize=$pagesize;
$this->pagenum=$this->getPageNum();
$this->offset=$this->getOffset();
}
private function getPageNum(){ //調用該方法返回總頁數
return ceil($this->count/$this->pagesize);
}
private function next(){ //調用該方法返回下一頁的頁面索引
if($this->page==$this->pagenum){
return false; //如果當前頁等於總頁數,沒有下頁,則返回false
}else{
return $this->page+1; //如果有下一頁,則當前頁加一
}
}
private function prev(){ //調用該方法返回上一頁的頁面索引
if($this->page==1){
return false; //如果當前頁是第一頁,沒有上頁,則返回false
}else{
return $this->page-1; //如果有上一頁,則當前頁減一
}
}
private function getOffset(){
return ($this->page-1)*$this->pagesize; //返回查詢時limit 要用的參數
}
public function getpageinfo(){ //返回分頁信息數組
$pageinfo=array(
"pagesize" => $this->pagesize,
"page" => $this->page,
"count" => $this->count,
"pagenum" => $this->pagenum,
"next" => $this->next(),
"prev" => $this->prev(),
"offset" => $this->offset
);
return $pageinfo;
}
}
?>