What are some potential reasons why a PHP webshop works on a local server but not on an online server?

The issue could be related to differences in server configurations between the local and online servers. One common reason is that the online server may have stricter security settings or different PHP versions that are not compatible with the webshop code. To solve this issue, you can check the error logs on the online server to identify any specific issues and make necessary adjustments to the code to ensure compatibility with the online server's configuration.

// Check error logs on the online server to identify any specific issues
// Make necessary adjustments to the code to ensure compatibility with the online server's configuration