PHP分页函数

分页|函数

//分页函数

function genpage(&$sql,$page_size=20)

{

      global $prepage,$nextpage,$pages,$sums;  //out param

      $page = $_GET["page"]>=1?$_GET["page"]:1;

      $eachpage = $page_size;

      $pagesql = strstr($sql," from ");

      $pagesql = "select count(*) as ids ".$pagesql;

      $result = mysql_query($pagesql);

      if($rs = mysql_fetch_array($result)) $sums = $rs[0];

      $pages = ceil(($sums-0.5)/$eachpage)-1;

      $pages = $pages>=0?$pages:0;

      $prepage = ($page>0)?$page-1:0;

      $nextpage = ($page

      $startpos = $page*$eachpage;

    $sql .=" limit $startpos,$eachpage ";

}

//显示分页

function showpage()

{

    global $page,$pages,$prepage,$nextpage,$queryString; //param from genpage function
    $shownum =10/2;

    $startpage = ($page>=$shownum)?$page-$shownum:0;

    $endpage = ($page+$shownum

    echo "共".($pages+1)."页: ";

    if($page>0)echo "第一页";

    if($startpage>0)

        echo " ... «";

    for($i=$startpage;$i

    {

        if($i==$page)    echo " [".($i+1)."] ";

        else        echo " ".($i+1)." ";

    }

    if($endpage

        echo "» ... ";

    if($page

        echo "最后页";

}

?>