What are the potential risks of redirecting requests for non-existent PHP files to a specific PHP or HTML file?

Redirecting requests for non-existent PHP files to a specific PHP or HTML file can potentially expose sensitive information or create security vulnerabilities if not handled properly. To mitigate these risks, it is important to validate user input, sanitize data, and restrict access to critical files. 

// Redirect non-existent PHP files to a specific file
if (!file_exists($_SERVER['SCRIPT_FILENAME'])) {
    header("Location: error.php");
    exit();
}

Keywords

security risk 404 error file inclusion vulnerability PHP header function error handling

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