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class page extends mysql
{
public $page;
public $page_size;
private $table;
private $condition;
private $limit;
private $href;
private $action_value;
private $url_value;
//分頁初始化
function __construct($page,$page_size,$table,$condition,$limit,$href,$action_value,$url_value)
{
$this->page=$page;
$this->page_size=$page_size;
$this->table=$table;
$this->condition=$condition;
$this->limit=$limit;
$this->href=$href;
$this->action_value=$action_value;
$this->url_value=$url_value;
$this->get_page();
}
/**
* get the page's value判斷當前在第幾頁
*/
function get_page()
{
if($this->page=="")
{
$this->page=1;
}
return $this->page;
}
/**
* page main code //調用轉到指定的分頁代碼號。
*/
function go_page()
{
if($this->page!="")
{
$reslut=mysql::fn_select($this->table,'count(*) as `total`',$this->condition,'',$this->limit);
$rs=mysql::fetch_array($reslut);
$message_count=$rs['total']; //get the messages's count number
$page_count=ceil($message_count/$this->page_size); //get the page's count number
$offset=($this->page-1)*$this->page_size; //get the first value of sql's limit
if($message_count<=$this->page_size)
{
$page_code=array("","","","");
}
else if($this->page==1)
{
$page_code=array("",
"",
"<a name=code href=".$this->href."?page=".($this->page+1)."&action=".$this->action_value."&".$this->url_value.">下一頁</a>",
"<a name=code href=".$this->href."?page=".$page_count."&action=".$this->action_value."&".$this->url_value.">尾頁</a>");
}
else if($this->page==$page_count)
{
$page_code=array("<a name='code' href=".$this->href."?page=1&action=".$this->action_value."&".$this->url_value.">首頁</a>",
"<a name='code' href=".$this->href."?page=".($this->page-1)."&action=".$this->action_value."&".$this->url_value.">上一頁</a>",
"",
"");
}
else
{
$page_code=array("<a name='code' href=".$this->href."?page=1&action=".$this->action_value."&".$this->url_value.">首頁</a>",
"<a name='code' href=".$this->href."?page=".($this->page-1)."&action=".$this->action_value."&".$this->url_value.">上一頁</a>",
"<a name='code' href=".$this->href."?page=".($this->page+1)."&action=".$this->action_value."&".$this->url_value.">下一頁</a>",
"<a name='code' href=".$this->href."?page=".$page_count."&action=".$this->action_value."&".$this->url_value.">尾頁</a>");
}
$page_info=array(
"message_count"=>$message_count,
"page_count"=>$page_count,
"offset"=>$offset,
"page_size"=>$this->page_size,
"page_now"=>$this->page,
"page_first"=>$page_code[0],
"page_up"=>$page_code[1],
"page_next"=>$page_code[2],
"page_one_last"=>$page_code[3]
);
return $page_info;
}
}
} |
