How to find recursive dates in php or mysql? - php

Question

I have a data like this:
$date = '01-01-2014';
$time = '15:20:00';
$location = 'New Delhi';
$recursive = '1';
.........................
......................... // other data
$recursive = 1 means weekly and 2 means monthly.
Now what i am tring to do is if recursive type is weekly then add 7 days into it till 3 months and if recursive type is monthly then add 1 month into it till 3 months.
Exa:1 $date = '01-01-2014' and $recursive = '1'
Means in above example $recursive is weekly, so get a recursive date for January, February and March.
So the expected results are:
01-01-2014, 08-01-2014, 15-01-2014, 22-01-2014, 29-01-2014 (recursiive date in january)
05-02-2014, 12-02-2014, 19-02-2014, 26-02-2014 (recursiive date in february)
05-03-2014, 12-03-2014, 19-03-2014, 26-03-2014 (recursiive date in march)
Exa 2: $date = 15-04-2014 and $recursive = 1 then get recursive date for April, May and June.
output:
15-04-2014,22-04-2014,29-04-2014 (recursive date in april)
06-05-2014,13-05-2014,20-05-2014,27-05-2014 (recursive date in may)
03-06-2014,10-06-2014,17-06-2014,24-06-2014 (recursive date in june)
Exa 3 : $date = 01-01-2014 and $recursive = 2 then get recursive date for April, May and June.
This is monthly recursive, means add 1 month into it.
output:
01-01-2014
01-02-2014 (recursiive date in february)
01-03-2014 (recursiive date in march)
then i want to insert these dates with other data into database table.
so how to achive above things? should i write logic in php or use mysql query for it?
Thanks in advance.
SIDENOTE: currently i am using this accepted answer. but now i am trying to change that.

Answer 1

so basically what you want to do is something like this.
//you have to have a default time zone set.. so i just did this you should already have it in your .ini file
date_default_timezone_set('America/Los_Angeles');
$date = '01-01-2014';
$time = '15:20:00';
$location = 'New Delhi';
$recursive = '1';
//set your start date and end date
$startdate = date_create($date);
$enddate = date_create($date);
$enddate = date_add($enddate,date_interval_create_from_date_string("3 months"));
//set the interval string
if($recursive == '1'){
$str = "7 days";
} else {
$str = "1 month";
}
function recursivefunc($str, $start, $end){
//if the start is equal or bigger than end pop out.
$s = date_format($start,"Y/m/d");
$e = date_format($end,"Y/m/d");
if(strtotime($s) >= strtotime($e)){
return 1;
}
echo date_format($start,"Y/m/d"), '<br>'; //print out the starting date for each loop
$newDate = date_add($start,date_interval_create_from_date_string($str)); //increment the start
recursiveFunc($str, $newDate, $end); //call the function again
}
recursiveFunc($str, $startdate, $enddate); // initial call to the function

Answer 2

This is how i solve it.
$date = '01-01-2014';
$location = 'New Delhi';
$start = strtotime("+2 months", strtotime($date)); //start date
$end_date = date("Y-m-t", $start); // last day of end month
$end = strtotime($end_date); //last date
/* if recursion type is weekly */
if($json['recurrence'] == "1")
{
for($dd=$start; $dd<=$end;)
{
$new_date = date('Y-m-d', $dd);
$data[] = array(
'date' => $new_date,
'location' => $location
);
$dd = strtotime("+7 day", $dd); // add 7 days
}
}
if($json['recurrence'] == "2")
{
for($dd=$start; $dd<=$end;)
{
$new_date = date('Y-m-d', $dd);
$data[] = array(
'date' => $new_date,
'location' => $location
);
$dd = strtotime("+1 month", $dd); //add 1 month
}
}
echo "<pre>";
print_r($data);