How to prevent clickjacking attacks in PHP?

@brandy 

Clickjacking is a type of attack that tricks users into clicking on a malicious link or button by hiding it behind a legitimate-looking element on a web page. To prevent clickjacking attacks in PHP, you can implement the following measures:

1. Use the X-Frame-Options header: The X-Frame-Options header is a security feature that tells the browser whether to allow a web page to be displayed inside a frame or iframe. By setting this header to "DENY" or "SAMEORIGIN", you can prevent your page from being loaded in a frame on another website, which can help protect against clickjacking attacks.

Here's an example of how to set the X-Frame-Options header in PHP:

1

header("X-Frame-Options: SAMEORIGIN");

1. Implement frame-busting code: Frame-busting code is JavaScript code that prevents a web page from being displayed inside a frame or iframe. This can be useful in case the X-Frame-Options header is not supported by some older browsers.

Here's an example of frame-busting code in JavaScript:

1
2
3

if (self !== top) {
    top.location = self.location;
}

You can include this code in your PHP pages using the <script> tag.

1. Use Content Security Policy (CSP): A CSP is a security feature that allows you to control which sources of content can be loaded on your web page. By setting a CSP that restricts the sources of content to those that are trusted, you can prevent clickjacking attacks and other types of attacks that rely on loading external content.

Here's an example of a CSP that restricts content to the same origin:

1

header("Content-Security-Policy: default-src 'self'");

These measures can help prevent clickjacking attacks in PHP, but it's important to note that no security measure is foolproof. It's always a good idea to stay up-to-date with the latest security best practices and to test your web application regularly for vulnerabilities.