How to get current date and time in PHP: detailed guide with examples

Hello everyone! I just started learning PHP and ran into a problem. I need to display the current date and time on the website, but I don't understand how to do it correctly. I tried different options, but I keep getting errors or not what I expected.\n\nHere's my code:\n```php\n\n```\nBut it gives an error: "Warning: date() expects at least 1 parameter, 0 given". I googled it and added a parameter:\n```php\n\n```\nNow the date is displayed, but the time is missing. I want to get the full information: current date and time in the format "2024-01-15 14:30:45". I also need to show the time in the Moscow time zone (UTC+3), not in the server's system time.\n\nPlease explain in detail how to work with date and time in PHP correctly. What