Are there any specific coding guidelines or recommendations for embedding external content, such as social media widgets, in PHP projects like MediaWiki?

When embedding external content, such as social media widgets, in PHP projects like MediaWiki, it is important to follow security best practices to prevent vulnerabilities like cross-site scripting (XSS) attacks. One way to mitigate this risk is to sanitize and validate the input data before displaying it on the page. You can achieve this by using functions like htmlspecialchars() to escape special characters and prevent malicious code execution.

// Example code snippet to sanitize and display external content in PHP
$externalContent = "<iframe src='https://www.example.com/widget'></iframe>";
$sanitizedContent = htmlspecialchars($externalContent);
echo $sanitizedContent;