How can you ensure proper handling of form data in PHP?

To ensure proper handling of form data in PHP, you should always sanitize and validate user input to prevent security vulnerabilities such as SQL injection and cross-site scripting attacks. You can achieve this by using functions like filter_input() and htmlspecialchars() to sanitize input and validate it against expected formats. 

// Example of sanitizing and validating form data in PHP
$name = filter_input(INPUT_POST, 'name', FILTER_SANITIZE_STRING);
$email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL);

if ($name && $email) {
    // Process the form data
    echo "Name: " . $name . "<br>";
    echo "Email: " . $email;
} else {
    echo "Invalid input data";
}

Keywords

Sanitize validation htmlspecialchars filter_input error handling

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