foreign key does not update on cascade - php

Question

I am using phpmyadmin 4.7.3 version. I made 2 tables with innoDB storage engine in a same database and i want to update foreign key automatically by using cascade but it does not work at all. In my dineOwnerUser table i have id field which is foreign key in webpromo table with the name of ownerid. Here are all step which i did to make it foreign key.
went to webpromo table
clicked on relation view button
after that i setup all option which is visible in image
So far i have explained which i have done the problem is that my webpromo table is totally empty even though foreign key is also not updating automatically. If i am wrong here kindly please guide me also I am posting my code just in case i am doing some thing wrong in coding here is my php code
<?php
session_start();
if(isset($_POST['recaptcha'])){
$secret = "************";
$response = $_POST['recaptcha'];
$remoteip = $_SERVER['REMOTE_ADDR'];
$url = file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=$secret&response=$response&remoteip=$remoteip");
$content = json_decode($url, TRUE);
if($content['success'] ==1){
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
$data = strtolower($data);
return $data;
}
$discount = test_input($_POST["discount"]);
$discountitem = test_input($_POST["discountitem"]);
$website = test_input($_POST["website"]);
$expirydate = test_input($_POST["expirydate"]);
$desc = test_input($_POST["desc"]);
$filename;
if(isset($_FILES['logouploader']['name'])){
$filename = basename($_FILES['logouploader']['name']);
$filename = test_input($filename);
}
$dir = "img/uploads/";
$ext = strtolower(pathinfo($_FILES['logouploader']['name'], PATHINFO_EXTENSION));
$allowed = array('jpeg','png' ,'jpg');
if(!in_array($ext,$allowed) ) {
echo "wrongext";
$uploadOk = 0;
exit;
}
if ($_FILES["logouploader"]["size"] > 600000) {
echo "large";
$uploadOk = 0;
exit;
}
$uploadOk = 1;
if ($uploadOk == 0) {
echo "Sorry";
exit;
}
if ($uploadOk == 1) {
move_uploaded_file($_FILES["logouploader"]["tmp_name"], $dir.$filename);
$servername = "localhost";
$username = "*****";
$password = "*****";
try {
$conn = new PDO("mysql:host=$servername;dbname=*********", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$query = "INSERT INTO webpromo (discount, dealitem, website, expirydate, description, logouploader) VALUES (?, ?, ?, ?, ?, ?)";
$statement = $conn->prepare($query);
$statement->execute(
array(
$discount,
$discountitem,
$website,
$expirydate,
$desc,
$filename
) );
$conn = null;
exit;
echo "done";
}
catch(PDOException $e)
{
echo "Connection failed: " . $e->getMessage();
}
}
}
if($content['success'] !=1){
echo "notok";
$conn = null;
exit;
}
$conn = null;
exit;
}
?>
Note: i am getting image in my folder that's mean upto
move_uploaded_file($_FILES["logouploader"]["tmp_name"], $dir.$filename); my code is working fine
but after that when i try to populate my webpromo table with the form input values as well as uploaded image name it does not populate at all.
Thanks

Answer 1

You have got the wrong idea my friend it does not mean your data will be automatically inserted if you are using cascade.
What is used for actually is if the primary key value is updated then it updates the foreign key value in all respective tables.
You have to write a seperate insert query.