PHP分页与SQL

Question

我使用PHP和SQL完成了这个分页。第2页模块中缺少id 11和12。我无法找出我在做错的地方。请在下面找到源代码

<?php
$per_page = 5;
$rec_count = $row['id'];
$total_pages = ceil($rec_count / $per_page);         

if (isset($_GET['page'])) {
    $show_page = $_GET['page']; //current page
    if ($show_page > 0 && $show_page <= $total_pages) {
        $start = ($show_page - 1) * $per_page;
        $end = $start + $per_page;
    } else {
        $start = 0;
        $end = $per_page;
    }
} else {
    $start = 0;
    $end = $per_page;
}

$page = intval($_GET['page']);
$tpages=$total_pages;
if ($page <= 0)
    $page = 1;

$sql = "SELECT COUNT(Id) AS id FROM [Register].[dbo].[RegisData] WHERE DeleteStatus = 1";
$result = sqlsrv_query($conn,$sql); 
$row = sqlsrv_fetch_array($result, SQLSRV_FETCH_ASSOC);
$rec_count = $row['id'];
$total_pages = ceil($rec_count / $per_page);

$sql1 = "SELECT [Id],[FirstName],[LastName],[ProfilePic],[Gender]
                ,[Email],[MobileNo],[Company],[Designation],[Country],[State],[Address],[City]
                ,[Pincode],[Hobbies],[DietaryHabits],[DeleteStatus] 
        FROM (SELECT *, ROW_NUMBER() OVER (ORDER BY RegId) as row 
        FROM [Register].[dbo].[RegisData]) 
        a WHERE row between $start and $end 
        AND DeleteStatus = 1 
        ORDER BY RegId";

$result = sqlsrv_query($conn,$sql1);
$z = 1;
for ($x=1; $x<=$total_pages; $x++) {
    echo $x;
}  
?> 

请在我犯错的地方帮助我。