PHP替换MySQL Now（）

I do a lots of queries like:

SELECT THIS
FROM THAT
WHERE ROW_TIME < NOW()

How to create variable in PHP that will contain current time so i can make this work:

SELECT THIS
FROM THAT
WHERE ROW_TIME < '$variable'

?

the PHP date($format) function returns current time as a string. You can set the format using a string.

date("Y-m-d H:i:s")

You should use time() - it returns a timestamp. http://php.net/manual/en/function.time.php

The PHP date function will help.