Duplicate php object into two similar objects - php

Question

I have an object with some variables for events (id, date, time, etc) gathered from a database. Some events have multiple days per week, so I want to duplicate the event object for each day listed and mark which day it's being duplicated for.
For example, I have this object inside an array:
Array
(
[0] => stdClass Object
(
[id] => 1
[days] => Array
(
[0] => Mon
[1] => Tues
)
)
)
and I'd like it to look like this:
Array
(
[0] => stdClass Object
(
[id] => 1
[day] => Mon
[days] => Array
(
[0] => Mon
[1] => Tues
)
)
[1] => stdClass Object
(
[id] => 1
[day] => Tues
[days] => Array
(
[0] => Mon
[1] => Tues
)
)
)
For some reason, when it loops through the second time the object is getting updated in the 0 position of the main array and the 1 position like so:
Array
(
[0] => stdClass Object
(
[id] => 1
[day] => Tues
[days] => Array
(
[0] => Mon
[1] => Tues
)
)
[1] => stdClass Object
(
[id] => 1
[day] => Tues
[days] => Array
(
[0] => Mon
[1] => Tues
)
)
)
This is a replication of the array declaration and loop I'm using:
$out = array();
$arr = array();
$arr[0] = new stdClass();
$arr[0]->id = 1;
$arr[0]->days = array("Mon","Tues");
foreach($arr as $a){
foreach($a->days as $day){
$a->day = $day;
$out[] = $a;
}
}
I did the same thing with straight arrays (cast the object as an array) and there it worked as I hoped, but it'd be nice to know how to do it with objects as well.
Any ideas?

Answer 1

You've got a single object, $a, referenced from both spots in the array. To duplicate the object instead use $out[] = clone $a; in place of $out[] = $a;.