Display value instead of ID mysqli - php

Question

When I add $elan_category, I get category_id, instead category_title.
Tried to apply "left join" but no success. I have following tables in database:
function getElanDetail()
{
global $con;
if (isset($_GET['elan_id'])) {
$elan_id = $_GET['elan_id'];
$get_elan = "select * from elan where elan_id='$elan_id'";
$run_elan = mysqli_query($con, $get_elan);
while ($row_elan = mysqli_fetch_array($run_elan)) {
$elan_id = $row_elan['elan_id'];
$elan_category = $row_elan['elan_category'];
$elan_title = $row_elan['elan_title'];
$elan_description = $row_elan['elan_description'];
$elan_image = $row_elan['elan_image'];
$elan_contact = $row_elan['elan_contact'];
echo "
$elan_category //Getting ID of category instead Title :(
$elan_title
$elan_description
$elan_image
$elan_contact
";
}
}
}

Answer 1

With join you can do something like:
$elan_id = $_GET['elan_id'];
$get_elan = "SELECT * FROM `elan`
JOIN `categories` ON `categories`.category_id = `elan`.elan_category
WHERE `elan`.elan_id='$elan_id'";
$run_elan = mysqli_query($con, $get_elan);
while ($row_elan=mysqli_fetch_array($run_elan)){
print_r($row_elan);
// see the keys in $row_elan and use them accordingly
}
For subcategories try this query:
SELECT * FROM `elan`
JOIN `categories` ON `categories`.category_id = `elan`.elan_category
JOIN `subcategories` ON `subcategories`.subcategory_id = `elan`.elan_subcategory
WHERE `elan`.elan_id='$elan_id'

Answer 2

$elan_category = $row_elan['elan_category'];
add these two lines after above code
$cat = mysqli_fetch_row(mysqli_query($con,"SELECT category_title FROM categories WHERE category_id = $elan_category"));
$cat_name = $cat[0];
$cat_name is your category name enjoy