What are some common mistakes or errors to avoid when using the date() function in PHP to display the current time?

One common mistake when using the date() function in PHP to display the current time is forgetting to specify the correct timezone. This can result in incorrect time being displayed. To avoid this error, always set the timezone using date_default_timezone_set() function before calling the date() function.

// Set the timezone to the desired location
date_default_timezone_set('America/New_York');

// Display the current time in the specified format
echo date('Y-m-d H:i:s');