What are the recommended ways to securely display user-generated content in PHP applications?

Displaying user-generated content in PHP applications can pose security risks such as cross-site scripting (XSS) attacks. To securely display user-generated content, it is recommended to sanitize the input data to prevent malicious scripts from being executed. This can be achieved by using functions like htmlspecialchars() to escape special characters and prevent XSS attacks. 

$userContent = "<script>alert('XSS attack!');</script>";
$sanitizedContent = htmlspecialchars($userContent, ENT_QUOTES, 'UTF-8');
echo $sanitizedContent;

Keywords

XSS prevention htmlspecialchars content security policy input validation output encoding

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