DateTime, diff in PHP

　　

Manual Address: http://php.net/manual/en/dateinterval.format.php

1 $january=NewDateTime (' 2010-01-01 ');2 $february=NewDateTime (' 2010-02-01 ');3 $interval=$january->diff ($february);4 5 //%a would output the total number of days.6 Echo $interval->format ('%r%a total days '). ' <br/> ';//+31 Total Days7 8 //While%d would only output the number of already covered by the9 //month.Ten Echo $interval->format ('%m month,%d days ');//1 month, 0 days

Format formatting parameters:

The following characters is recognized in the format parameter string. Each format character must is prefixed by a percent sign ( %).

format character	Description	Example values
%	Literal %	%
Y	Years, numeric, at least 2 digits with leading 0	in the
Y	Years, numeric	1, 3
M	Months, numeric, at least 2 digits with leading 0	A.
M	Months, numeric	1, 3,
D	Days, numeric, @ least 2 digits with leading 0	A.
D	Days, numeric	1, 3,
A	Total number of days as a result of a DateTime::d iff () or (unknown)otherwise	4, 8123
H	Hours, numeric, at least 2 digits with leading 0	A.
H	Hours, numeric	1, 3,
I	Minutes, numeric, at least 2 digits with leading 0	on the other.
I	Minutes, numeric	1, 3,
S	Seconds, numeric, at least 2 digits with leading 0	A.
S	Seconds, numeric	1, 3,
R	Sign "-" when negative, "+" when positive	-, +
R	Sign "-" when negative, empty when positive	-,

DateTime, diff in PHP