What potential issues can arise when migrating a PHP program from a local server to a host server with different PHP versions?

When migrating a PHP program from a local server to a host server with different PHP versions, potential issues can arise due to compatibility issues with the code. To solve this problem, it's important to check for any deprecated functions or features that may have been removed or changed in the newer PHP version. Updating the code to use the latest PHP syntax and functions will help ensure compatibility across different server environments. 

// Example of updating code to use the latest PHP syntax and functions
// Before migration
$timestamp = time();

// After migration
$timestamp = strtotime('now');

Keywords

PHP version compatibility deprecated functions syntax errors server configuration database connection errors

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