How to prevent clickjacking attacks using PHP forms

With the continuous upgrading of network attack methods, clickjacking attacks have become a common problem in the field of network security. A clickjacking attack refers to a malicious attacker using a transparent iframe layer to implement a layer of "trap" on the page that the user originally wanted to click without the user's knowledge, directly guiding the user to click, thereby stealing user information. Conduct harmful attacks such as fraud.

In the development process of the website, using PHP forms to prevent clickjacking attacks is an effective defense method.

To implement this PHP form to prevent click hijacking attacks, you need to perform the following operations:

1. Set X-FRAME-OPTIONS

Pass in the HTML page Set an X-FRAME-OPTIONS to prevent the page from being included in an iframe, thus effectively preventing clickjacking attacks. Its function is to tell the browser not to display the current page as a subpage of the iframe.

The setting method is as follows:

Add the following code to the header of the PHP page:

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

"SAMEORIGIN" here means that pages under this domain name can be displayed using iframe tags, while pages under other domain names cannot be included in iframes.

2. Set Content-Security-Policy

Content-Security-Policy (content security policy) is an HTTP header in which a series of policies are defined, thus Limit the way JavaScript is executed and resources loaded in the page, thereby limiting possible attack methods. Setting Content-Security-Policy is also an effective way to prevent clickjacking attacks.

Add the following code to the header of the PHP page:

header("Content-Security-Policy: frame-ancestors 'self';");

The above code means that only The host can access this resource, but other websites cannot call it.

It is worth mentioning that the above security policies have different adaptability to different browsers, thus enabling multiple ways of defense.

Summary: Through the settings of the above two methods, in the development of PHP forms, you can effectively defend against click hijacking attacks and reduce the security risks of the website.

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