Passing session variables to another page - php

Question

I am trying to pass session variable to the next page, index.php but i have gotten an error undefined index on foreach($_SESSION['result'] as $row). May i know what's wrong?
<?php
session_start();
$search = preg_replace("/[^A-Za-z0-9]/", " ", $_POST['query']);
$search = $db->real_escape_string($search);
if (strlen($search) >= 1 && $search !== ' ') {
$query = 'SELECT * FROM tablename WHERE name LIKE "%'.$search.'%"';
$result = $db->query($query) or trigger_error($db->error."[$query]");
while($results = $result->fetch_array()) {
$resultArray[] = $results;
}
if (isset($resultArray)) {
foreach ($resultArray as $result) {
$show_name = preg_replace("/".$search."/i", "<b class='highlight'>".$search."</b>", $result['name']);
$show_url = 'index.php';
$out = str_replace('name', $show_name, $html);
$out = str_replace('url', $show_url, $out);
$_SESSION['result']= $result['name'];
echo($out);
}
}
}
?>
index.php
session_start();
<table>
<?php foreach($_SESSION['result'] as $row){ ?>
<tr>
<td>
<?php echo $row['name'];?>
</td>
<td>
<?php echo $row['description'];?>
</td>
</tr>
<?php } ?>
</table>

Answer 1

if $_SESSION['result'] is an array then try like below
$_SESSION['result'][]= $result['name'];
as per your code session result variable is not an array

Answer 2

You never start the session in the first file. Start the file with
<?php
session_start();
Because you're missing that, when you assign a value to $_SESSION['result'] after your queries, nothing is saved in session.
There is another error. You mean for $_SESSION['result'] to be an array, but you're saving it as a string. Change:
$_SESSION['result']= $result['name'];
To
$_SESSION['result'][]= $result['name'];