PHP function implements paging including text paging and number paging, _PHP tutorial

PHP function implements paging including text paging and number paging,

Recently, paging is used in projects. The paging function is a frequently used function, so it is encapsulated in the form of a function.

// 分页分装
/**
* $pageType 分页类型 1是数字分页 2是文本分页
* 可以将$pageTotal,$page,$total等数据作为参数传递，或者在paging作为全局变量（推荐）
*/
function paging($pageType)
{
global $pageTotal,$page,$total;
if($pageType == 1)
{
echo '<div id="pagenum">';
echo'<ul>';
for($i=0; $i < $pageTotal; $i++)
{ 
if($page == ($i+1))
{
echo '<li><a href="blogfriends.php&#63;page='.($i+1).'" class="selected">'.($i+1).'</a></li>';
}
else
{
echo '<li><a href="blogfriends.php&#63;page='.($i+1).'">'.($i+1).'</a></li>';
}
}
echo'</ul>';
echo'</div>';

}
else if($pageType == 2)
{
echo '<div id="pagetext">';
echo '<ul>';
echo '<li>'.$page.'/'.$pageTotal.'页 | </li>';
echo '<li>共有<strong>'.$total .'</strong>个会员 | </li>';
// 第一页
if($page == 1)
{
echo '<li>首页 | </li>';
echo '<li>上一页 | </li>';
}
else
{
// $_SERVER["SCRIPT_NAME"]获取当前的脚本名字，方便移植
// 也可以自定义常量，常量值和脚本文件名一致
echo '<li><a href="'.$_SERVER["SCRIPT_NAME"].'">首页 </a>| </li>';
echo '<li><a href="'.$_SERVER["SCRIPT_NAME"].'&#63;page='.($page - 1).'">上一页 </a>| </li>';
}
// 最后一页
if($page == $pageTotal)
{
echo '<li>下一页 | </li>';
echo '<li>尾页 | </li>';
}
else
{
echo '<li><a href="'.$_SERVER["SCRIPT_NAME"].'&#63;page='.($page + 1).'">下一页 </a>| </li>';
echo '<li><a href="'.$_SERVER["SCRIPT_NAME"].'&#63;page='.($pageTotal).'">尾页 </a>| </li>';
} 
echo '</ul>';
echo '</div>';
}
}

Parameter explanation:

$pageTotal is the total number of pages, $page is the current page, $total is the total number of data obtained from the database;

For simplicity, all parameters are encapsulated

// 分页参数分装
/**
* $sql 可以 获取数据总数的一个sql语句
* $size 每一页显示条数
*/
function pageParam($sql,$size)
{
// 将所有涉及的参数设置全局变量
// $pagestart 某一页从哪里开始
// $total 总记录数 $page 某一页 $pageTotal 总页数
global $pagestart,$pagesize,$total,$page,$pageTotal;
$pagesize = $size;
// 获取数据总数
$total = mysql_num_rows(queryDB($sql));

// 错误处理，先判断是否存在
if(isset($_GET['page']))
{
// 具体某一页
$page = $_GET['page'];
// 判断是否为空(0是空)/小于0/是否是数字
if(empty($page) || $page < 0 || !is_numeric($page))
{
$page = 1;
}
else
{
$page = intval($page); //取整，防止小数出现
}

}
else
{
// 初始化显示第1页
$page = 1;
}

// 数据库清零
if($total == 0)
{
// 设置为1
$pageTotal = 1;
}
else
{
// 分页的总页数(进一取整处理)
$pageTotal = ceil($total / $pagesize);
}

// 页数大于总页码$total
if($page > $pageTotal)
{
$page = $pageTotal;
}
// 当页从某一条记录开始
$pagestart = ($page - 1) * $pagesize;
}

Parameter explanation:

$pagestart is when the page starts from a certain record, $pagesize is the number of records displayed on each page

In use, call pageParam first, then call paging

/**
* 第一个 可以 获取数据总数的一个sql语句
* 第二个 每一页显示条数
*/
pageParam("select userid from user",2);

<&#63;php 
// 分页类型 1是数字分页 2是文本分页
paging(2);
&#63;>

The calling position is selected according to the specific situation, and the text is paginated as follows:

<&#63;php 
// 分页类型 1是数字分页 2是文本分页
paging(1);
&#63;> 

Numbers are paginated as follows:

The style can be adjusted by yourself.

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