Grouping php array items based on user and created time
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by Jim
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Published on 2010-05-15T16:29:39Z
Indexed on
2010/05/15
16:34 UTC
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This is an array of objects showing a user uploading photos:
Array
(
[12] => stdClass Object
(
[type] => photo
[created] => 2010-05-14 23:36:41
[user] => stdClass Object
(
[id] => 760
[username] => mrsmith
)
[photo] => stdClass Object
(
[id] => 4181
)
)
[44] => stdClass Object
(
[type] => photo
[created] => 2010-05-14 23:37:15
[user] => stdClass Object
(
[id] => 760
[username] => mrsmith
)
[photo] => stdClass Object
(
[id] => 4180
)
)
)
However instead of showing:
mr smith uploaded one photo
mr smith uploaded one photo
I'd like to display:
- mr smith uploaded two photos
by grouping similar items, grouping by user ID and them having added them within, let's say 15 minutes of each other. So I'd like to get the array in this sort of shape:
Array
(
[12] => stdClass Object
(
[type] => photo
[created] => 2010-05-14 23:36:41
[user] => stdClass Object
(
[id] => 760
[username] => mrsmith
)
[photos] => Array
(
[0] => stdClass Object
(
[id] => 4181
)
[1] => stdClass Object
(
[id] => 4180
)
)
)
)
preserving the first item of the group and it's created time, and supplementing it with any other groupable photos and then unsetting any items that were grouped (so the final array doesn't have key 44 anymore as it was grouped in with 12).
The array contains other actions than just photos, hence the original keys of 12 and 44. I just can't figure out a way to do this efficiently. I used to use MySQL and PHP to do this but am trying to just use pure PHP for caching reasons.
Can anyone shed any insights? I thought about going through each item and seeing if I can group it with the previous one in the array but the previous one might not necessarily be relevant or even a photo. I've got total brain freeze :(
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