Unique items in an array

[Marc Guay <marc.guay@xxxxxxxxx>]

Hi folks,

Let's say that I have the following array:

  [0]=>
  array(35) {
    ["contact_id"]=>
    string(3) "356"
    ["contact_first_name"]=>
    string(4) "Marc"
 }
  [1]=>
  array(35) {
    ["contact_id"]=>
    string(3) "247"
    ["contact_first_name"]=>
    string(4) "Marc"
  }
  [2]=>
  array(35) {
    ["contact_id"]=>
    string(3) "356"
    ["contact_first_name"]=>
    string(4) "Marc"
 }

And I would like to filter out exact duplicates, such as key 0 and key
2 in this example, leaving me with an array containing only unique
entries.  How would you go about it?

Thanks for any help,
Marc

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