Unable to store data via mysqli_connect - php

Question

Hey guys currently I'm trying to create a login activity for android application and I have no idea why the user data is not stored upon registration. Is there something wrong with the php files as shown below?
Register.php stores registration for users
<?php
$con = mysqli_connect("mysql13.000webhost.com", "a1641537_fetch", "password", "a1641537_fetchdb");
$name = $_POST["name"];
$username = $_POST["username"];
$password = $_POST["password"];
$statement = mysqli_prepare($con, "INSERT INTO Fetch (name, username, password) VALUES (?, ?, ?) ");
mysqli_stmt_bind_param($statement, "sss", $name, $username, $password);
mysqli_stmt_execute($statement);
mysqli_stmt_close($statement);
mysqli_close($con);
?>
FetchUserData.php fetches username and password of a user.
<?php
$con = mysqli_connect("mysql13.000webhost.com", "a1641537_fetch", "password", "a1641537_fetchdb");
$username = $_POST["username"];
$password = $_POST["password"];
$statement = mysqli_prepare($con, "SELECT * FROM Fetch WHERE username = ? AND password = ?");
mysqli_stmt_bind_param($statement, "ss", $username, $password);
mysqli_stmt_execute($statement);
mysqli_stmt_store_result($statement);
mysqli_stmt_bind_result($statement, $name, $username, $password);
$user = array();
while(mysqli_stmt_fetch($statement)) {
$user[name] = $name;
$user[username] = $username;
$user[password] = $password;
}
echo json_encode($user);
mysqli_stmt_close($statement);
mysqli_close($con);
?>

Answer 1

fetch is a reserved word in mysql so you need to quote it in backticks.
For example:
$statement = mysqli_prepare($con, "INSERT INTO `Fetch` (name, username, password) VALUES (?, ?, ?) ");
To catch these kinds of mistakes, it is useful to add error handling. I prefer to do that by having msyqli throw an exception when anything goes wrong.
To activate that, just add mysqli_report(MYSQLI_REPORT_STRICT); to the top of your script and make sure that errors are displayed.
If you don't add any try - catch blocks yourself, php will show you a detailed unhandled exception error when a problem occurs so you can take it from there. Obviously in live code this is not the preferred way to handle that.