Pagination displaying issue php - php

Question

In simple pagination, when clicking different no. 1,2,3,4, records from table not changing
as they should.
I'm displaying 5 records on each page,as on click 1 it display record from table 1 to 5,and so on.But,it is not changing.Help me.
<?php
mysql_connect("localhost","root","");
mysql_select_db("bluewater");
$page = $_GET["page"];
if($page=="" || $page=="1")
{
$page1=0;
}
else
{
$page1=($page*5)-5;
}
$sql=mysql_query("select * from countries limit 1,5");
while($ser = mysql_fetch_array($sql)) {
echo $ser["ccode"];
echo $ser["country"];
echo "<br>";
}
$sql=mysql_query("select * from countries");
$cou=mysql_num_rows($sql);
$a=$cou/5;
$a= ceil ($a);
echo "<br>"; echo "<br>";
for ($b=1;$b<=$a;$b++)
{
?><?php echo $b." ";?> <?php
}
?>

Answer 1

1) Don't use mysql_ functions, use mysqli_ or PDO.
2) To move via pages, you need to increase offset in query.
$page = $_GET['page'];
$itemsPerPage = 5;
$offset = ($page * $itemsPerPage) - $itemsPerPage;
$query = $db->prepare("SELECT * FROM `countries` LIMIT {$itemsPerPage} OFFSET {$offset}");
$query->execute();
$results = $query->fetchAll();

Answer 2

You never make use of your $page variable in the query. Change it to
select * from countries limit ".$page.", 5
and it should work
Also, mysql_real_escape_string($page)!

Answer 3

$sql=mysql_query("select * from countries limit $page1,5");
replace the first query with above code.

Answer 4

Just replace the your first sql query with the my sql query:
your sql query
$sql=mysql_query("select * from countries limit 1,5");
You provided static start limit is "1"
Correct Sql query:
$sql=mysql_query("select * from countries limit $page1,5");
Make its static limit is $page1 variable.

Answer 5

Try this approach.It is easier to understand.
//code for database connection
$left_rec=$rec_count-($page*$rec_limit);
$res=mysqli_query("select * from countries");
$rec_count=mysqli_num_rows($res);//Total no of records
if(isset($_GET['page']))
{
$page=$_GET['page']+1;
$offset=$rec_limit*$page;
}
else
{
$page=0;
$offset=0;
}
$rec_limit=5;//no of records per page
$offset=$page*$rec_limit;
$left_rec=$rec_count-($page*$rec_limit);
$res=mysqli_query("select * from countries limit $offset,$rec_limit");
while($row = mysqli_fetch_array($res))
{
echo $row["ccode"];
echo $row["country"];
echo "";
}
if($page==0)
{
echo"Next";
}
else if($left_rec <= $rec_limit)
{
$last=$page-2;
echo"Prev";
}
?>