What are some best practices for error handling and input validation when processing user input in PHP forms?

Issue: When processing user input in PHP forms, it is important to implement error handling and input validation to ensure data integrity and security. PHP code snippet: 

// Error handling and input validation for processing user input in PHP forms

// Check if form is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    
    // Validate input fields
    $name = $_POST['name'];
    $email = $_POST['email'];
    
    if (empty($name) || empty($email)) {
        echo "Please fill out all required fields";
    } else {
        // Process the form data
        // Add additional validation or processing here
    }
    
} else {
    echo "Form submission method not allowed";
}

Keywords

try-catch filter_input htmlspecialchars validation exception

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