issue when changing record limit in php dynamic pagination - php

Question

I am learning PHP and was trying to created dynamic pagination to show record form MySQL.
The issue I'm facing is when I change number of record to be show by using SELECT tag it only works once after that it goes back to default value that i have set -> $limit = isset($_POST['records-count'])?$_POST['records-count']:"10"; which is 10.
PHP
include('../config/DbFunction.php');
$obj = new DbFunction();
$limit = isset($_POST['records-count'])?$_POST['records-count']:"10";
$page = isset($_GET['page'])? $_GET['page']:"1";
$start_data = ($page-1)*$limit;
$rs = $obj->view_course($limit,$start_data);
//print_r($limit); // to check limit value
$course_row = mysqli_fetch_row($obj->view_course1());
$total_records = $course_row[0];
$total_page = ceil($total_records/$limit);
$next = $page + 1 > $total_page? $total_page : $page +1;
$prev = $page - 1 == 0? 1 : $page - 1;
?>
Form
<form method="post" action="#">
Records: <select name="records-count" id="records_count">
<option disabled="disabled" selected="selected">Limit</option>
<?php foreach([20,50,100,200] as $limit): ?>
<option <?php if( isset($_POST["records_count"]) && $_POST["records_count"] == $limit) echo "selected" ?> value="<?= $limit; ?>"><?= $limit; ?></option>
<?php endforeach; ?>
</select>
</form>
Pagination
<div class="pagination">
<ul class="pagination pagination-default">
<li class='page-item'><a class='page-link' href="view-course.php?page=<?= $prev; ?>">Previous</a></li>
<?php
for ($i=1; $i<=$total_page; $i++) {
echo "<li class='page-item'><a class='page-link' href='view-course.php?page=".$i."'>".$i."</a></li>";
}
?>
<li class='page-item'><a class='page-link' href="view-course.php?page=<?= $next; ?>">Next</a></li>
</ul>
</div>

Answer 1

you may need to store and retrieve it from session. Session will allow to store variable in server
you need to start the session before send anything to client.
session_start();
if(isset($_POST['records-count']))
$_SESSION["records-count"] = $_POST['records-count'];
last thing to note is:
session variable will be updated in next requests.

Answer 2

After so many try I got the solution by using GET method
So i Change
$limit = isset($_POST['records-count'])?$_POST['records-count']:"10";
<div class="pagination">
<ul class="pagination pagination-default">
<li class='page-item'><a class='page-link' href="view-course.php?page=<?= $prev; ?>">Previous</a></li>
<?php
for ($i=1; $i<=$total_page; $i++) {
echo "<li class='page-item'><a class='page-link' href='view-course.php?page=".$i."'>".$i."</a></li>";
}
?>
<li class='page-item'><a class='page-link' href="view-course.php?page=<?= $next; ?>">Next</a></li>
</ul>
</div>
to
if (isset($_POST['records-count'])) {
$limit = $_POST['records-count'];
} else {
$limit = empty($_GET['records'])? "2":$_GET['records'];
}
<div class="pagination">
<ul class="pagination pagination-default">
<li class='page-item'><a class='page-link' href="view-course.php?page=<?= $prev; ?>&records=<?= $limit; ?>">Previous</a></li>
<?php
for ($i=1; $i<=$total_page; $i++) {
echo "<li class='page-item'><a class='page-link' href='view-course.php?page=".$i."& records=".$limit."'>".$i."</a></li>";
}
?>
<li class='page-item'><a class='page-link' href="view-course.php?page=<?= $next; ?>&records=<?= $limit; ?>">Next</a></li>
</ul>
</div>
If anyone know more efficient or better way then this plz let me know.