What are the best practices for handling database queries within the context of HTML output in PHP applications?

When handling database queries within the context of HTML output in PHP applications, it is important to separate your PHP logic from your HTML presentation to maintain clean and organized code. One common best practice is to perform the database queries at the beginning of your PHP script, store the results in variables, and then use those variables within your HTML output. This separation of concerns helps improve code readability, maintainability, and scalability. 

<?php
// Perform database query
$query = "SELECT * FROM users";
$result = mysqli_query($connection, $query);

// Check if query was successful
if ($result) {
    // Fetch data from the result set
    while ($row = mysqli_fetch_assoc($result)) {
        // Output HTML using data from database
        echo "<p>Name: " . $row['name'] . "</p>";
        echo "<p>Email: " . $row['email'] . "</p>";
    }
} else {
    echo "Error: " . mysqli_error($connection);
}

// Close database connection
mysqli_close($connection);
?>

Keywords

SQL injection PDO prepared statements mysqli data sanitization

Related Questions