What are some potential issues you might encounter when using network functions in PHP?

When using network functions in PHP, you might encounter potential issues such as network connectivity problems, compatibility issues with server configurations, and security vulnerabilities. Network connectivity issues can arise due to problems with the server, internet connectivity, or firewall settings. Compatibility issues may occur if the PHP configuration or server environment is not properly set up to support the network functions. Security vulnerabilities may be present if user input is not properly validated and sanitized when using network functions. It's important to address these issues by ensuring network connectivity, maintaining compatible server configurations, and implementing proper security measures to protect against potential vulnerabilities.