Laravel 5.7 POST Request Error 419: How Can I Fix My Expired Session/Page?

Post Request Error in Laravel 5.7: Troubleshooting 419 Sorry, your session/page has expired

Laravel 5.7 has introduced a middleware that verifies CSRF tokens. This protects your application from cross-site request forgery attacks. However, it can also lead to "419 Sorry, your session/page expired" errors if the token check fails.

Verifying the CSRF Token

Ensure that your form contains a CSRF token verifier:

<form method="POST" action="/foo">
    @csrf
    <input type="text" name="name"/>
    <input type="submit" value="Add"/>
</form>

Session Configuration

Verify your session configuration in the .env file. Supported session drivers include:

• file
• cookie
• database
• memcached
• redis
• array

If switching the session driver resolves the issue, it indicates a problem with the previous driver. Troubleshoot the driver's configuration.

Possible Error Scenarios

• File-based sessions: Check file permissions for the /storage directory.
• Database driver: Confirm your database connection and the existence and correctness of the sessions table.
• Redis/memcached: Ensure that the configuration is accurate and that other code is not manipulating it.

Other Troubleshooting Steps

• Generate a new application key using php artisan key:generate to flush session data.
• Clear the browser cache, as Chrome and Firefox can contribute to the issue.
• Consider why application keys are important, especially when encountering errors related to CSRF token verification.

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