associating two separate arrays for itinerary system - php

Question

I am trying to build a travel itinerary system. The user selects the dates of travel, and then may add items to each day.
I have an array of dates, stored in a session in the format:
array(
(int) 0 => '2012-08-25',
(int) 1 => '2012-08-26',
(int) 2 => '2012-08-27'
)
They will then choose attractions, which I wish to store in an array in the format:
array(
(int) 0 => array(
'Attraction' => array(
'attraction_id' =>'1',
'name' => 'Place One',
)
),
(int) 1 => array(
'Attraction' => array(
'attraction_id' => '2',
'name' => 'Place Two',
)
),
I'd like to be able to output:
2012-08-25
Place One
Place Two
2012-08-26
nothing here yet!
2012-08-27
nothing here yet!
So, each item of the first array contains an array of items, if that makes sense. I am struggling with the logic of associating the keys of the days array with the items array.
I looked at array_merge but that doesn't seem to do what I need.
Is there an easy way to achieve this?

Answer 1

This code does exactly what you ask. Unfortunately, I fear your question doesn't reflect your aim given the example. Using keys to link data will led to 1-1 relationship, where as you seem to need a 1-n. You should have a foreign key field in the attraction array, like date_id.
$array= array();
foreach($dates as $date_key=>$date){
$array[$date]=array();
foreach($attractions as $attraction_key=>$attraction){
if($date_key==$attraction_key){
$array[$date][]=$attraction['Attraction']['name'];
}
}
}