How to generate CSRF token in PHP | Why using CSRF token in your application ? #csrf #phptoken

Cross-Site Request Forgery (CSRF) is a security vulnerability that occurs when an attacker tricks a victim's browser into making an unwanted request on a trusted website where the user is authenticated. To prevent CSRF attacks in PHP applications, including core PHP, you can implement CSRF tokens.
Here's a simple example of how you can implement CSRF tokens in core PHP:
1. Generate CSRF Token: Generate a unique CSRF token and store it in the session.
session_start();
if (!isset($_SESSION['csrf_token'])) {
$_SESSION['csrf_token'] = bin2hex(random_bytes(32)); // Generate a 32-byte token
}
2. Include CSRF Token in Forms: Include the CSRF token in your HTML forms as a hidden field.
3. Validate CSRF Token on Form Submission: When processing the form submission, validate the CSRF token.
4. Regenerate Token on each Request: Regenerate the CSRF token on each successful form submission to mitigate the risk of token reuse.

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