Sort an Array of Objects within Array by value

Question

Basically I'm trying to sort a complex array of Objects within an array:

I need to sort by occurrence_date and ensure that the data in the top Object (e.g.190515) doesn't become corrupted with other objects and to include the possibility that there could be a 2nd occurrence_date for the "times" [array] of Objects.

I've seen similar sort arrays of objects by field here, but not with the depth of the array/object. I tried using usort but I don't think my syntax to the value is correct.

Basically what I tried.

function cmp($x, $y) {
    if ($x->occurrence_date > $y->occurrence_date) {
      return 1; }
    else {
      return -1; }
 }
usort($node->timeout_events_schedule->venues, 'cmp');

Thanks in advance

Originally I was sorting by times_list, but changed to occurrence_date. I'll update. — homersheineken
– homersheineken, Commented Oct 5, 2012 at 20:58

Roberto Maldonado · Accepted Answer · 2012-10-05 21:49:57Z

3

How about:

function compare($x,$y)
{
    if($x->times[0]->occurrence_date == $y->times[0]->occurrence_date)
        return 0;
    elseif($x->times[0]->occurrence_date < $y->times[0]->occurrence_date)
        return -1;
    else
        return 1;

}

uasort($your_array,'compare');

uasort() preserve your keys, unlike usort() http://www.php.net/manual/en/function.uasort.php

edited Oct 5, 2012 at 21:49

answered Oct 5, 2012 at 20:39

Roberto Maldonado

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7 Comments

dev-null-dweller Over a year ago

Well, after undeleting and completely changing your answer after 25 minutes one should expect it to be proper, but presented code will not work with sample data provided by OP. Thats why it is better to guide someone in writing own code that he will understand how it works, so it can be customized without further help.

Roberto Maldonado Over a year ago

my bad D: I'll do it that way next time

homersheineken Over a year ago

I tried this and it didn't sort. Also tried @dev-null-dweller's suggestion to use the var as: $x->times[0]->occurence_date and that killed php.

Roberto Maldonado Over a year ago

Sorry, I messed up the return of the compare function. I edited it.

homersheineken Over a year ago

Thanks, but even with the edit, it does not sort correctly. Could it be that we aren't "getting" to the variable? Does there need to be a [0] or something before ['times']?

|

dev-null-dweller · Accepted Answer · 2012-10-05 21:02:02Z

2

Few tips to help you solve your problem:

you will need uasort function, to preserve associative keys
You can not access occurrence_date key directly from $x o r $y, you will need $x->times[0]->occurence_date
Before doing comparison, iterate through $x->times just to check if there are more entries, pick one that suits your needs.
since occurence_date is a number you don't have to use string comparison function

Good luck :)

answered Oct 5, 2012 at 21:02

dev-null-dweller

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