What resources or tutorials are recommended for beginners to learn about working with databases in PHP for rating and fairness systems?

When working with databases in PHP for rating and fairness systems, it is recommended for beginners to familiarize themselves with MySQL or other database management systems. Tutorials on SQL queries, database normalization, and PHP database functions can be helpful in understanding how to store and retrieve data efficiently. Additionally, resources on implementing rating algorithms and fairness checks in PHP can aid in creating a robust system. 

<?php
// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "ratings_db";

$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Sample SQL query to retrieve ratings for a specific user
$user_id = 1;
$sql = "SELECT rating FROM ratings WHERE user_id = $user_id";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // Output data of each row
    while($row = $result->fetch_assoc()) {
        echo "Rating: " . $row["rating"] . "<br>";
    }
} else {
    echo "0 results";
}

$conn->close();
?>

Keywords

MySQL PHP PDO database design SQL queries normalization

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