What are some best practices for processing form data in PHP?

When processing form data in PHP, it is important to sanitize and validate the input to prevent security vulnerabilities such as SQL injection and cross-site scripting attacks. One common best practice is to use PHP's filter_input() function along with filter_var() function to sanitize and validate input data. 

// Example of processing form data in PHP
$email = filter_input(INPUT_POST, 'email', FILTER_SANITIZE_EMAIL);
if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
    // Email is valid, proceed with processing
} else {
    // Invalid email, handle error
}

Keywords

Sanitize Validation htmlspecialchars filter_var $_POST

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