PHP:: array_unique for arrays inside array

Question

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

Man, this always comes up. Read the manual, it says "Note that array_unique() is not intended to work on multi dimensional arrays."
I don't understand what you mean by "Hi, like array_unique for arrays inside array."

Tim Cooper · Accepted Answer · 2011-03-06 17:09:14Z

up vote 3 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);

answered Mar 6 '11 at 17:09

Tim Cooper
36.1k105381

mario · Answer 2 · 2011-03-06 17:10:45Z

up vote 1 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) {

answered Mar 6 '11 at 17:10

mario
59.3k54887

2 Answers