What best practices should be followed when integrating PHP scripts with HTML for online shop functionalities?

When integrating PHP scripts with HTML for online shop functionalities, it is best practice to separate logic from presentation by using PHP to handle backend processing and HTML for frontend display. This can be achieved by embedding PHP code within HTML files or by creating separate PHP files to handle specific functionalities and include them in the HTML files as needed. Additionally, it is important to sanitize user input to prevent security vulnerabilities such as SQL injection or cross-site scripting attacks. 

<?php
// Sample PHP script for processing form data in an online shop

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Sanitize user input
    $product_name = htmlspecialchars($_POST['product_name']);
    $quantity = intval($_POST['quantity']);

    // Perform backend processing (e.g. update database, calculate total price)
    // ...

    // Display success message or redirect to another page
    echo "Order for $quantity $product_name has been placed successfully!";
}
?>

Keywords

PHP HTML integration online shop functionalities

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