Ah, why?

Ah, why? I want to create a 10 thousand percentile, but the month generated by the date function, such as February, is displayed as 02. how can I change it to 2? ------ Solution ------------------ compare echo & nbsp; date (Y-m-d); and echo & nbsp; date (Y-n-d ); result ------ solution ------------------ month, why?
I want to create a 10 thousand percentile, but the month generated by the date function, such as February, is displayed as 02. how can I change it to 2?
------ Solution --------------------
Compare it yourself
Echo date ('Y-m-D ');
And
Echo date ('Y-n-D ');
Result

------ Solution --------------------
Month
M number, with the prefix 001-12
N numeric, no prefix 01-12
The full name of month F is from January 1, January to January 1, December.
Jan-Dec, the first three letters of month M