In PHP development, how can the EVA principle be applied to efficiently manage user input validation and error handling?

In PHP development, the EVA principle (Escape, Validate, and Aggregate) can be applied to efficiently manage user input validation and error handling. By escaping user input to prevent SQL injection and XSS attacks, validating input to ensure it meets expected criteria, and aggregating errors to provide meaningful feedback to users, developers can enhance the security and usability of their applications. 

// Escape user input to prevent SQL injection and XSS attacks
$username = mysqli_real_escape_string($conn, $_POST['username']);
$email = htmlspecialchars($_POST['email']);

// Validate input to ensure it meets expected criteria
if(empty($username) || empty($email)){
    $error = "Username and email are required";
}

// Aggregate errors to provide meaningful feedback to users
if(isset($error)){
    echo $error;
} else {
    // Proceed with processing user input
}

Keywords

EVA principle PHP development user input validation error handling efficiency

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