Php calculates the time difference between two dates (year, month, and day) _ php instance

This article describes how to calculate the time difference between two dates (year, month, and day) in php, and how many days, months, and pre-dates in Weibo, for more information, see the PHP program. In most cases, you may encounter handling time problems, such as determining how long the user has been online and how many days have the user logged on to the system, the time difference between two posts or the log records between different operations. In this article, we will give an example of how PHP calculates the differences between the two dates: year, month, and day.

<? Php/** + ------------------------------------------------------------ * function: calculate the difference between the two dates: year, month, and day + period * @ param date $ date1 start date * @ param date $ date2 end date + period * @ return array + period */function DiffDate ($ date1, $ date2) {if (strtotime ($ date1)> s Trtotime ($ date2) {$ ymd = $ date2; $ date2 = $ date1; $ date1 = $ ymd;} list ($ y1, $ m1, $ d1) = explode ('-', $ date1); list ($ y2, $ m2, $ d2) = explode ('-', $ date2 ); $ y = $ m = $ d =$ _ m = 0; $ math = ($ y2-$ y1) * 12 + $ m2-$ m1; $ y = round ($ math/12); $ m = intval ($ math % 12); $ d = (mktime (0, 0, 0, $ m2, $ d2, $ y2)-mktime (0, 0, 0, $ m2, $ d1, $ y2)/86400; if ($ d <0) {$ m-= 1; $ d + = date ('J', mktime (0, 0, 0, $ m2, 0, $ y2);} $ m <0 & $ y-= 1; return array ($ y, $ m, $ d) ;}?>