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up vote 4 down vote favorite

I need like array_unique for arrays inside array.

The Case - should be equal, but output "not equal":

<?php
$arr=array(array('a',1),array('a',2));
$arr2=array_unique($arr);
if($arr2==$arr){
  echo "equal";
}
else{
  echo "not equal";
}
?>

How Should be code fix to get output "equal"?

Thanks, Yosef

share|improve this question
    
Man, this always comes up. Read the manual, it says "Note that array_unique() is not intended to work on multi dimensional arrays." –  BoltClock♦ Mar 6 '11 at 17:00
2  
I asking for "like" solution, please read my question –  Yosef Mar 6 '11 at 17:16
    
I don't understand what you mean by "Hi, like array_unique for arrays inside array." –  BoltClock♦ Mar 6 '11 at 17:31

3 Answers 3

up vote 12 down vote accepted

You should modify your call for array_unique to have it include the SORT_REGULAR flag.

$arr2 = array_unique($arr, SORT_REGULAR);
share|improve this answer
up vote 2 down vote

If you want to test if the outer array has unique entries, then stringify the inner contents first for a comparison:

$arr1 = array_map("serialize", $arr);
$arr2 = array_unique($arr1);
if ($arr2 == $arr1) {
share|improve this answer
up vote 0 down vote 
function array_unique_when_values_are_serializable($main_array) {
    return array_map('unserialize', array_values(array_unique(array_map('serialize', $main_array))));
}
share|improve this answer
    
Please explain your answer. SO exists to teach users, not just answer questions. –  Machavity Apr 3 at 20:08

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