What are the common reasons for a PHP website to work locally and on a hosting provider but not on a Raspberry Pi?

The most common reasons for a PHP website to work locally and on a hosting provider but not on a Raspberry Pi are differences in server configurations, PHP versions, and missing dependencies on the Raspberry Pi. To solve this issue, ensure that the necessary PHP extensions and dependencies are installed on the Raspberry Pi, and check for any configuration differences that may be causing the website to not function properly.

// Example code snippet to check for missing dependencies on Raspberry Pi

if (!extension_loaded('mysqli')) {
    die('The required MySQLi extension is not installed on this server.');
}