How to use a selection to generate an sql query - php

Question

I need to use the selection from and HTML select element as one of the variables in my sql query. Meaning if the user selects "Iphone" from the list, I want to query to be something like select * where name = Iphone.
I do not know how to go about this, thank you.
This code creates the select based on the query:
<option disabled selected value> -- Select a forum -- </option>
<?php
$con = mysqli_connect("host","user","pass","db");
if (!$con) {
die('Connection failed: ' . mysqli_connect_error() . '<br>');
}
$productName='SELECT p.name
FROM product as p
JOIN ownedproducts as o on o.productID = p.productID
WHERE usersID =2;';
$result=mysqli_query($con, $productName);
while ($row = mysqli_fetch_assoc($result)) {
unset($id);
$id = $row['name'];
echo '<option value="'.$id.'">'.$id.'</option>';
}
</select>
I would like to take what the user selects, including multiple selections, and build a table based on that something like this where the AND p.name = selected is replaced with what would actually work in this case. I think javascript is the way to go but I do not know enough.
<?php
$query1 = $db->query('SELECT p.productID, p.name, p.company, o.prodtype AS Type
FROM ownedproducts AS o
JOIN product as p ON p.productID = o.productID
WHERE o.usersID = 2
AND p.name = selected');
while ($row = $query1->fetch())
{
if . $row['name'] . = selected:
echo "<tr id=" . $row['productID'] . ">";
echo "<td>" . $row['name'] . "</td>";
echo "<td>" . $row['company'] . "</td>";
echo "<td>" . $row['Type'] . "</td>";
echo "</tr>";
}
?>
Edited for more detail.
Thanks in advance

Answer 1

Though, I am not sure what are you asking for but select statement for exact match will be like below=>
select * from tablename where name='Iphone';
or if you want partial match then you can use wildcard(%) and like operator given below =>
select * from tablename where name like '%Iphone%';