Re: the function of to calculate the diff of date

I suggest you see http://php.net/strtotime Goba LeeYeeKang 李藝康 wrote: > hi, i am Yeekang ,i used PHP in web programming. I think PHP isn't eazy to > calculate the diff of day (ex how many day between 2003/08/15 and 2003/09/21), > so i write this function and wish it can help others handles problems > efficiently. > > > string datediff(DATE $date,STRING $parameter,CHAR $split) > $date is date format which like 2003/03/16 YYYY/MM/DD > $parameter can be Date format or int, > if $parameter's type is Date ,function will calucute the diff between with > $date > else $date will increase/decrease the $parameter > $split is the mark to split the DATE, i think it may be useless @_@ > > YeeKang > > <? > function datediff($date,$parameter,$split="0"){ > //setting the pattern for split use > if($split!="0") //if the pattern have set by user > $pattern = $split; > else //found out the character which use at $date > $pattern = substr(ereg_replace("[0-9]","",$date),0,1); > > $date1 = explode($pattern,$date); //split the date => year,month,day > > if(!checkdate($date1[1],$date1[2],$date1[0])) //check the date format > return FALSE; > > if(is_numeric($parameter)){ //if you want to increase or decrease > $timestamp = mktime(0,0,0,$date1[1],$date1[2]+$parameter,$date1[0]); > > return date("Y-m-d",$timestamp); //return the date after > increase/decrease > }else{ //just found out the diff of the date > if($split=="0") > $pattern = substr(ereg_replace("[0-9]","",$parameter),0,1); > > $date2 = explode($pattern,$parameter); //split the parameter => > year,month,day > > if(!checkdate($date2[1],$date2[2],$date2[0])) //check the date format > return FALSE; > > $timestamp1 = mktime(0,0,0,$date1[1],$date1[2],$date1[0]); > //translate to timestamp > $timestamp2 = mktime(0,0,0,$date2[1],$date2[2],$date2[0]); > $diff = ($timestamp1 > $timestamp2)?($timestamp1 - > $timestamp2):($timestamp2 - $timestamp1); > > return $diff/86400; //return the diff of the date > } > } > echo "Today : ".date("Y-m-d")."<br>"; > echo "datediff(date(\"Y-m-d\"),4) : ".datediff(date("Y-m-d"),4); > echo "<br>"; > echo "datediff(date(\"Y-m-d\"),-4) : > ".datediff(date("Y-m-d"),-4); > echo "<br>"; > echo "datediff(date(\"Y-m-d\"),\"2003-02-21\") : > ".datediff(date("Y-m-d"),"2003-02-21"); > echo "<br>"; > echo "datediff(date(\"Y@m@d\"),\"2003@08@21\",\"@\") : > ".datediff(date("Y@m@d"),"2003@08@21","@"); > echo "<br>"; > echo "datediff(date(\"Y@m@d\"),\"2003$08$21\") : > ".datediff(date("Y@m@d"),"2003$08$21"); > ?> > > Today : 2003-08-18 > datediff(date("Y-m-d"),4) : 2003-08-22 > datediff(date("Y-m-d"),-4) : 2003-08-14 > datediff(date("Y-m-d"),"2003-02-21") : 178 > datediff(date("Y@m@d"),"2003@08@21","@") : 3 > datediff(date("Y@m@d"),"2003$08$21") : 3 > > > > ------------------------------------------------- > This mail sent through NCTU WebMail System: > https://webmail.nctu.edu.tw >