number of records between two dates phpmysql - php

Question

I have this code to get records between two dates $date1 and $date2
for ($i=$date1;$i<$date2;$i++){//BETWEEN THE TWO DATES
$count_rcvd=mysql_num_rows(mysql_query("select * from cards where Date_Rcvd='$i'"));
$count_collect=mysql_num_rows(mysql_query("select * from cards where Date_Collected='$i'"));
if($i==$date1){FOR THE FIRST DATE IN THE RANGE
$uncollected=mysql_num_rows(mysql_query("select * from cards where Status='AVAILABLE' and Date_Rcvd<='$i'"));
$balance=$uncollected;
}
else{//FOR CONSECUTIVE DATES AFTER DATE1
$uncollected=mysql_num_rows(mysql_query("select * from cards where Status='AVAILABLE' and Date_Rcvd<'$i'"));//previous days balance
$balance=$uncollected+$count_rcvd-$count_collect;
When i echo for $i
echo "";
echo $i;
echo "";
echo $count_rcvd;
echo "";
echo $count_collect;
echo "";
echo $balance;
echo "";
I get out below with the date going well beyond the calender dates
014-03-15 0 7 103
2014-03-16 0 3 100
2014-03-17 0 7 96
2014-03-18 0 9 94
2014-03-19 0 5 98
2014-03-20 15 6 112
2014-03-21 0 6 103
2014-03-22 0 1 108
2014-03-23 0 0 109
2014-03-24 0 8 101
2014-03-25 0 3 106
2014-03-26 0 0 109
2014-03-27 1 2 108
2014-03-28 0 0 110
2014-03-29 6 1 115
2014-03-30 0 0 116
2014-03-31 0 0 116
2014-03-32 0 0 116
2014-03-33 0 0 116
2014-03-34 0 0
the problem is the output dates go beyond 31st for example....HELP!!!

Answer 1

To iterate on dates, i recommand you to use DateTime and DateTimeInterval classes (Be careful ! PHP 5.3 minimum) : http://www.php.net/manual/fr/class.datetime.php
You can add days/months following the real calendar : http://www.php.net/manual/fr/datetime.add.php