CSRF stands for Cross-Site Request Forgery, which is a type of attack where a malicious website can make a user’s web browser execute an unwanted action on another website on which the user is currently authenticated.
In PHP, a CSRF attack can occur when a user is tricked into clicking a link or submitting a form on a malicious website that contains a request to a legitimate website where the user is authenticated, and the request is executed without the user’s knowledge or consent.
For example, a user may be logged in to their bank account and visit a malicious website that contains a hidden form that submits a request to transfer money from the user’s account to the attacker’s account. The user may unknowingly submit the form, and the request will be executed on the legitimate bank website without the user’s knowledge.
To prevent CSRF attacks in PHP, developers can use various techniques such as generating and validating a unique token for each user session or request, checking the HTTP referer header, and using secure cookies.
