Remove duplicates from an object array

Question

I have an object array that looks like this:

Array
(
[0] =>Object
        (
            [ClassScheduleID] => 2263
            [Name] => Workout 1
            [Location] => Object
            (
                [BusinessID] => 1
            )
)
[1] =>Object
        (
            [ClassScheduleID] => 2263
            [Name] => Workout 1
            [Location] => Object
            (
                [BusinessID] => 13
            )
)
[2] =>Object
        (
            [ClassScheduleID] => 2264
            [Name] => Workout 2
            [Location] => Object
            (
                [BusinessID] => 22
            )
)

I am looking to identify that the ClassScheduleID of 2263 is a duplicate, and remove the duplicate entry's entire object from the array. So that I get:

Array
    (
    [0] =>Object
            (
                [ClassScheduleID] => 2263
                [Name] => Workout 1
                [Location] => Object
                (
                    [BusinessID] => 1
                )
    )

    [1] =>Object
            (
                [ClassScheduleID] => 2264
                [Name] => Workout 2
                [Location] => Object
                (
                    [BusinessID] => 22
                )
    )

I tried the solution proposed here

How to remove duplicate values from a multi-dimensional array in PHP

but the count() remained the same

Why don't you use the class schedule id as the key? That way you can't have duplicates. — Styphon, Apr 22 '14 at 15:53
The solution you tried is for arrays that are identical. Yours are not, the `BusinessID` is different. — AbraCadaver, Apr 22 '14 at 15:54
I am working with a defaulted output. If I want to change the key, then I need to rearrange the array myself. How would I do that? — kylesmith, Apr 22 '14 at 15:55
Abra, I want to remove the entire node if the ClassScheduleID is the same, regardless of the rest — kylesmith, Apr 22 '14 at 15:55
How do you determine which one to keep? The one with `->Location->BusinessID == 1`. — AbraCadaver, Apr 22 '14 at 16:00
Yes, that is correct. Upon finding a duplicate entry, it would remove those that had a businessID == 1 — kylesmith, Apr 22 '14 at 16:05

Nu Gnoj Mik · Accepted Answer · 2014-04-23T16:19:19.577

$count = 0;
foreach($arrayObj as $key => $value) {
    if ($value['ClassScheduleID'] == 2263) {
        $count++;
    }
    if ($count > 1){
        unset($arrayObj[$key]);
        $count--;
    }
}

It works: http://ideone.com/fork/zrdDtu

Edit: Modified to delete any duplicates:

foreach($arrayObj as $key => $value) {
    $count = 0;
    foreach($arrayObj as $nkey => $nvalue) {
        if ($value['ClassScheduleID'] == $nvalue['ClassScheduleID']) {
            $count++;
        }
        if ($count > 1){
            unset($arrayObj[$key]);
            $count--;
        }
    }
}

var_dump($arrayObj);

See it here: http://ideone.com/fork/85RCst

sorry, i guess i should have been more specific. i want it to remove ANY duplicate entries, the 2263 was just for demonstration — kylesmith, Apr 22 '14 at 18:30

score 0 · Answer 2 · answered Apr 22 '14 at 16:05

0

function get_unique_array($array)
{
   $result = array_map("unserialize", array_unique(array_map("serialize", $array)));

   foreach ($result as $key => $value)
   {
      if ( is_array($value) )
      {
        $result[$key] = get_unique_array($value);
      }
   }

   return $result;
}

Demo: http://3v4l.org/WOTHi#v430

answered Apr 22 '14 at 16:05

Parag Tyagi

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as with the previous example, it only removes complete duplicates in the array. – kylesmith Apr 22 '14 at 21:49

Remove duplicates from an object array

2 Answers2