Pagination in Php SQLITE - php

Question

I'm quite new to PHP. I'm playing around with connecting to a sqlite database and I've done that successfully. For some reason my pagination is not working.
The value of $page won't go beyond 2. Can someone help me out, I'm sure its probably a simple mistake. (So currently it does change from the first page to the next.
<?php
try
{
//open the database
$db = new PDO('sqlite:client.db');
//create the database
$db->exec("CREATE TABLE IF NOT EXISTS Client (id INTEGER PRIMARY KEY AUTOINCREMENT, first_name VARCHAR(50), last_name VARCHAR(50), email VARCHAR(50), gender VARCHAR(50))");
$page = 1;
if(!empty($_GET['page'])) {
$page = filter_input(INPUT_GET, 'page', FILTER_VALIDATE_INT);
if(false === $page) {
$page = 1;
}
}
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
//something posted
if (isset($_POST['Previous'])) {
print 'current value of $page = ' . $page;
print "<br>";
if($page <= 0) {
$page = 1;
}else {
$page = $page - 1;
}
} else if(isset($_POST['Next'])) {
print 'current value of $page = ' . $page;
print "<br>";
$page = $page + 1;
}
}
// set the number of items to display per page
$limit = 10;
// build query
$offset = ($page - 1) * $limit;
if($offset <= 0) {
$offset = 0;
}
print '$page = ' . $page;
print "<br>";
print '$offset = ' . $offset;
//now output the data to a simple html table...
print "<table border=1>";
print "<tr><td>Id</td><td>First Name</td><td>Last Name</td><td>Age</td><td>Gender</td></tr>";
$sql = "SELECT * FROM Client LIMIT " . $offset . "," . $limit;
$result = $db->query($sql);
//$rows = count($result);
//print $rows;
//checks if table has data
//$count = $result->fetchColumn();
foreach($result as $row)
{
print "<tr><td>".$row['id']."</td>";
print "<td>".$row['first_name']."</td>";
print "<td>".$row['last_name']."</td>";
print "<td>".$row['email']."</td>";
print "<td>".$row['gender']."</td></tr>";
}
print "</table>";
print "<br>";
//print "<button type=\"button\" name=\"button\"><< Previous </button>";
//print "<button type=\"button\" name=\"button\">Next >></button>";
print "<form class=\"\" action=\"\" method=\"post\">";
print "<button type=\"submit\" name=\"Previous\">Previous</button>";
print "<br><br><button type=\"submit\" name=\"Next\">Next</button>";
print "</form>";
// close the database connection
$db = NULL;
}
catch(PDOException $e)
{
print 'Exception : '.$e->getMessage();
}
?>

Answer 1

All credit goes to Ryan-Vincent for helping me solve this.
Basically, I had everything working, but had the incorrect attribute for the form action.
This is the only thing I changed and it worked fine (this is the opening form tag in html, notice the page url parameter gets its value from the php page variable.
print "<form class=\"\" action=\"?page=$page \" method=\"POST\">";
Hope this helps other php newbies.