What potential issue is raised by combining data sanitization and escaping in the same function?

Combining data sanitization and escaping in the same function can lead to double escaping, where the data is sanitized for one purpose but then escaped again for another purpose, potentially causing unintended behavior or security vulnerabilities. To solve this issue, it's best to separate the sanitization and escaping processes into distinct functions, ensuring that each data manipulation step is clear and intentional. 

function sanitizeData($data) {
    // Perform data sanitization here
    return $sanitizedData;
}

function escapeData($data) {
    // Perform data escaping here
    return $escapedData;
}

// Example usage:
$inputData = $_POST['input'];
$sanitizedData = sanitizeData($inputData);
$escapedData = escapeData($sanitizedData);

Keywords

data sanitization escaping security vulnerability SQL injection input validation

Related Questions