What are the considerations for defining and implementing dynamic content display in a PHP file like "mitte.php"?

When defining and implementing dynamic content display in a PHP file like "mitte.php", it is important to consider the source of the dynamic content (such as a database or external API), the logic for retrieving and displaying the content, and the security measures to prevent SQL injection or other vulnerabilities.

<?php

// Example code snippet for implementing dynamic content display in mitte.php

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

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

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

// Retrieve dynamic content from the database
$sql = "SELECT content FROM dynamic_content WHERE id = 1";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // Output data of each row
    while($row = $result->fetch_assoc()) {
        echo $row["content"];
    }
} else {
    echo "No dynamic content found";
}

$conn->close();

?>