What are some best practices for handling server-side requests in PHP scripts?

When handling server-side requests in PHP scripts, it is important to validate user input to prevent security vulnerabilities such as SQL injection or cross-site scripting attacks. Additionally, it is recommended to use prepared statements when interacting with databases to avoid SQL injection. Lastly, consider implementing error handling to gracefully handle unexpected errors and provide meaningful feedback to users. 

// Example of validating user input in a PHP script
if(isset($_POST['username']) && isset($_POST['password'])){
    $username = $_POST['username'];
    $password = $_POST['password'];

    // Validate input
    if(!empty($username) && !empty($password)){
        // Proceed with processing the request
    } else {
        // Handle invalid input
        echo "Please provide a valid username and password.";
    }
}

Keywords

HTTP requests cURL error handling security measures performance optimization

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