How can PHP beginners effectively learn and understand the fundamentals of PHP and MySQL to avoid basic coding issues?

Issue: PHP beginners often struggle with understanding the fundamentals of PHP and MySQL, leading to basic coding issues such as syntax errors, incorrect database queries, and security vulnerabilities. To effectively learn and understand the fundamentals of PHP and MySQL, beginners should start by learning the basics of PHP syntax, data types, variables, control structures, functions, and classes. They should also familiarize themselves with MySQL database management, including database design, querying data, and securing data. Additionally, beginners should practice writing PHP code that interacts with a MySQL database to reinforce their understanding of how PHP and MySQL work together. PHP Code Snippet:

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

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

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

// Perform a simple database query
$sql = "SELECT * FROM users";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "Name: " . $row["name"]. " - Email: " . $row["email"]. "<br>";
    }
} else {
    echo "0 results";
}

$conn->close();
?>