（急）PHP + MYSQL查询结果分页显示有关问题

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Release： 2016-06-13 13:30:17

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（急！！）PHP + MYSQL查询结果分页显示问题
include_once ("./config.php");
db_connect();
// 获取当前页数
if( isset($_POST['page']) )//判断是否有下面的表单post来的值
{
$page=$_POST['page'];
}
else if(isset($_GET['page']))//判断是否有get来的值
{
$page = intval( $_GET['page'] );
}
else
{
$page = 1;
}
// 每页数量
$page_size = 10;
$devicename=$_POST["textname"];

if($_POST[Submit]!=""）
{
$sql = "select count(*) as amount from labdeviceinfo where DeviceName='$devicename'";
}
else
{
$sql = "select count(*) as amount from labdeviceinfo";
}

$result = mysql_query($sql);
$row = mysql_fetch_row($result);
$amount = $row[0];// 获取总数据量
// 记算总共有多少页
if( $amount )
{
if( $amount {
$page_count = 1;
}
if( $amount % $page_size ) //取总数据量除以每页数的余数
{
$page_count = (int)($amount / $page_size) + 1; //如果有余数，则页数等于总数据量除以每页数的结果取整再加一
}
else
{
$page_count = $amount / $page_size; //如果没有余数，则页数等于总数据量除以每页数的结果
}
}
else
{
$page_count = 0;
}
// 翻页链接
$page_string = '';
if( $page == 1)
{
$page_string .= '首页|上一页|';
}
else
{
$page_string .= '首页|上一页|';

}
if( ($page == $page_count) || ($page_count == 0) )
{
$page_string .= '下一页|末页';
}
else
{
$page_string .= '下一页|末页';
}
?>

$server=$_SERVER['PHP_SELF'];
$start=($page-1)*$page_size;
if (($_POST[Submit]!=""||$_POST[textname]))
{
$devicename=$_POST["textname"];
$sqlquery="select * from labdeviceinfo where DeviceName='$devicename' limit $start , $page_size";
}
else
{
$sqlquery="select * from labdeviceinfo limit $start , $page_size";
}

$myresult=mysql_query($sqlquery);
while($myrow = mysql_fetch_array($myresult))
{
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"."详细"."