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PHP automatically adapts to the range of paging code

PHPz
PHPzOriginal
2016-07-29 08:38:32928browse

<?php 
function page($page,$total,$phpfile,$pagesize=10,$pagelen=7){ 
    $pagecode = &#39;&#39;;//定义变量,存放分页生成的HTML 
    $page = intval($page);//避免非数字页码 
    $total = intval($total);//保证总记录数值类型正确 
    if(!$total) return array();//总记录数为零返回空数组 
    $pages = ceil($total/$pagesize);//计算总分页 
    //处理页码合法性 
    if($page<1) $page = 1; 
    if($page>$pages) $page = $pages; 
    //计算查询偏移量 
    $offset = $pagesize*($page-1); 
    //页码范围计算 
    $init = 1;//起始页码数 
    $max = $pages;//结束页码数 
    $pagelen = ($pagelen%2)?$pagelen:$pagelen+1;//页码个数 
    $pageoffset = ($pagelen-1)/2;//页码个数左右偏移量 
    //生成html 
    $pagecode=&#39;<div class="page">&#39;; 
    $pagecode.="<span>$page/$pages</span>";//第几页,共几页 
    //如果是第一页,则不显示第一页和上一页的连接 
    if($page!=1){ 
        $pagecode.="<a href=\"{$phpfile}?page=1\"><<</a>";//第一页 
        $pagecode.="<a href=\"{$phpfile}?page=".($page-1)."\"><</a>";//上一页 
    } 
    //分页数大于页码个数时可以偏移 
    if($pages>$pagelen){ 
        //如果当前页小于等于左偏移 
        if($page<=$pageoffset){ 
            $init=1; 
            $max = $pagelen; 
        }else{//如果当前页大于左偏移 
            //如果当前页码右偏移超出最大分页数 
            if($page+$pageoffset>=$pages+1){ 
                $init = $pages-$pagelen+1; 
            }else{ 
                //左右偏移都存在时的计算 
                $init = $page-$pageoffset; 
                $max = $page+$pageoffset; 
            } 
        } 
    } 
    //生成html 
    for($i=$init;$i<=$max;$i++){ 
        if($i==$page){ 
            $pagecode.=&#39;<span>&#39;.$i.&#39;</span>&#39;; 
        } else { 
            $pagecode.="<a href=\"{$phpfile}?page={$i}\">$i</a>"; 
        } 
    } 
    if($page!=$pages){ 
        $pagecode.="<a href=\"{$phpfile}?page=".($page+1)."\">></a>";//下一页 
        $pagecode.="<a href=\"{$phpfile}?page={$pages}\">>></a>";//最后一页 
    } 
    $pagecode.="<input type=\"text\" size=\"3\" onkeydown=\"if(event.keyCode==13) {window.location.href=&#39;{$phpfile}?page=&#39;+this.value; return false;}\" /></div>"; 
    return array(&#39;pagecode&#39;=>$pagecode,&#39;sqllimit&#39;=>&#39; limit &#39;.$offset.&#39;,&#39;.$pagesize); 
} 
?>

Added page number jump text box

The following are the instructions for beginners

<?php
$phpfile = &#39;index.php&#39;;//页面文件名
$page= isset($_GET[&#39;page&#39;])?$_GET[&#39;page&#39;]:1;//默认页码
$db = mysql_connect(&#39;localhost&#39;,&#39;test&#39;,&#39;test&#39;);//链接数据库
mysql_select_db(&#39;test&#39;,$db);//选择数据库
$counts = mysql_num_rows(mysql_query(&#39;select `id` from `test`&#39;,$db));//获取需要的数据总条数
$sql=&#39;select `id`,`title` from `test`&#39;;//定义查询语句SQL
$getpageinfo = page($page,$counts,$phpfile);//调用函数,生成分页HTML 和 SQL LIMIT 子句
$sql.=$getpageinfo[&#39;sqllimit&#39;];//组合完整的SQL语句
$data = $row = array();//初始化数组
$result = mysql_query($sql,$db);//获取结果集
//将数据装入$data数组
while($row = mysql_fetch_array($result)){
$data[]=$row;
}
?>
<?php
echo $getpageinfo[&#39;pagecode&#39;];//显示分页的html代码
?>

css:

<style type="text/css">
body{font-family:Tahoma;}
.page{padding:2px;font-weight:bolder;font-size:12px;}
.page a{border:1px solid #ccc;padding:0 5px 0 5px;margin:2px;text-decoration:none;color:#333;}
.page span{padding:0 5px 0 5px;margin:2px;background:#09f;color:#fff;border:1px solid #09c;}
</style>


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