Data isn't sending from AndroidStudio to phpMyAdmin / 000webhost - php

Question

I'm trying to create a basic Register and Log in Application by following this tutorial: https://www.youtube.com/watch?v=JQXfIidfFMo&t=193s and because the code in Android Studio has shown 0 Compile Errors I've decided not to put that here.
What's wrong
Many users have reported in the comments section both old and new that they could not get their information sent to their database so any help would be greatly appreciated. The user inputs their 'name', 'username', 'password', and 'age' to register and this information is to then sent to my database hosted on 000webhost. Everything has been followed to the T.
The name of the table is called 'user'.
Here is the code to my Login.php file
<?php
$con = mysqli_connect("localhost:3306","id7390457_user","abcd1234","id7390457_data");
$username = $_POST["username"];
$password = $_POST["password"];
$statement = mysqli_prepare($con, "SELECT * FROM user WHERE username = ? AND password = ?");
mysqli_stmt_bind_param($statement, "ssis", $username, $password);
mysqli_stmt_execute($statement);
mysqli_stmt_store_result($statement);
mysqli_stmt_bind_result($statement, $user_id, $name, $age, $username, $password);
$response = array();
$response["success"] = false;
while(mysqli_stmt_fetch($statement)){
$response["success"] = true;
$response["name"] = $name;
$response["age"] = $age;
$response["username"] = $username;
$response["password"] = $password;
}
echo json_encode($response);
?>
Here is the code to my Register.php file
<?php
$con = mysqli_connect("localhost", "id7390457_user", "abcd1234", "id7390457_data");
$name = $_POST["name"];
$age = $_POST["age"];
$username = $_POST["username"];
$password = $_POST["password"];
$statement = mysqli_prepare($con, "INSERT INTO user (name, age, username, password) VALUES (?, ?, ?, ?)");
mysqli_stmt_bind_param($statement, "ssis", $name, $age, $username, $password);
mysqli_stmt_execute($statement);
$response = array();
$response["success"] = true;
echo json_encode($response);
?>
I have been under the impression that the line
$con = mysqli_connect("localhost", "id7390457_user", "abcd1234", "id7390457_data");
Is followed by using ('hostname', 'username', 'password', 'nameofdatabase')
However as I am doing this from my Mac so my host is 'localhost'
My DB Name is: id7390457_data
My DB User is: id7390457_user
I've tried using 'localhost:3306'
I've tried just 'user' and 'data'
I've watched YouTube videos, visited websites in other languages and none have seemed to provide any advise.
I've deleted multiple databases starting from scratch but I still face the issue whereby my information isn't being sent to phpMyAdmin on 000webhost.
My webhost doesn't have an index.html page but I don't think that this would be the issue.
Thank you
Any help would mean the world to me. Thank you wish you well!

Answer 1

Hi and welcome to StackOverflow!
You are right, the mysqli_connect expects the host, user, pass and db name in that order, so if the database is running and the values are correct as you said, this looks OK.
However on this line, note the second argument ssis:
mysqli_stmt_bind_param($statement, "ssis", $name, $age, $username, $password);
It states the type of the parameters, s for string and i for integer. It looks like the order is messed up, because age is expected as a string and username as an integer. If you replace it with siss, I would expect it to work.
More info: https://secure.php.net/manual/en/mysqli-stmt.bind-param.php