Are there any potential security risks associated with using "__HTML_END" in PHP scripts?

Using "__HTML_END" in PHP scripts can potentially expose sensitive information to malicious users. It is not a standard PHP function and could be a placeholder for HTML content, which may include sensitive data such as database credentials or API keys. To mitigate this security risk, it is recommended to avoid using "__HTML_END" and instead properly handle HTML content within PHP scripts using secure methods such as escaping output or using template engines.

// Avoid using "__HTML_END" and securely handle HTML content within PHP scripts
// Example of securely outputting HTML content using htmlspecialchars
$htmlContent = "<p>Hello, world!</p>";
echo htmlspecialchars($htmlContent);