Undefined offset: 0 error - php

Question

I'm having this error on my code
Notice: Undefined offset: 0 in C:\xampp\htdocs\rekmovie\paginator.php on line 29
here is the full code
<?php
$con=mysql_connect("localhost","root","");
$conn=mysql_select_db('rektechnologies');
if (!$con)
{
die('Could not connect: ' . mysql_error());
} // include your code to connect to DB.
if (!empty($_GET["page"])) { $page = $_GET["page"]; } else { $page=1; };
$start_from = ($page-1) * 20;
$sql = "select * from videos order by id desc LIMIT $start_from, 10";
$rs_result = mysql_query($sql,$con);
?>
<table>
<tr><td>Name</td><td>Phone</td></tr>
<?php
while ($row = mysql_fetch_assoc($rs_result)) {
?>
<tr>
<td><? echo $row["path"]; ?></td>
<td><? echo $row["description"]; ?></td>
</tr>
<?php
};
?>
<?php
$sql = "SELECT COUNT(*) FROM videos";
$rs_result = mysql_query($sql,$con);
$row = mysql_fetch_assoc($rs_result);
$total_records = $row[0];
$total_pages = ceil($total_records / 10);
for ($i=1; $i<=$total_pages; $i++) {
echo "<a href='paginator.php?page=".$i."'>".$i."</a> ";
};
?>
</table>
can anyone help me with the error

Answer 1

Change
$row = mysql_fetch_assoc($rs_result);
to:
$row = mysql_fetch_row($rs_result);
mysql_fetch_assoc returns an associative array, but you're trying to access $row[0], which expects an indexed array.

Answer 2

You are using mysql_fetch_assoc, but then trying to access the column name by integer
$row = mysql_fetch_assoc($rs_result);
$total_records = $row[0];
use either
$row = mysql_fetch_assoc($rs_result);
$total_records = $row['COUNT(*)'];
or
$row = mysql_fetch_array($rs_result);
$total_records = $row[0];

Answer 3

change the query to SELECT COUNT(*) as some_alias FROM videos
and then use $total_records = $row['some_alias'];