What are the best practices for handling URL redirection in PHP when generating links dynamically from database values?

When generating links dynamically from database values in PHP, it is important to handle URL redirection properly to prevent security vulnerabilities such as open redirects. To ensure safe redirection, always validate and sanitize the URL before redirecting to it. Use PHP's header() function to perform the redirection securely. 

// Sample code for handling URL redirection in PHP
$url = $_GET['url']; // Example: fetch URL from database

// Validate and sanitize the URL
if (filter_var($url, FILTER_VALIDATE_URL)) {
    // Perform safe redirection
    header("Location: " . $url);
    exit();
} else {
    // Handle invalid URL
    echo "Invalid URL";
}

Keywords

URL redirection PHP database values dynamic links handling

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