Remove duplicates from array

Question

I have two arrays, like this:

$array1 = array(
'ADAIR',
'ADAM',
'ADAMINA',
'ADDISON',
'ADDY',
'ADELLE',
'ADEN',
'ADOLPH',
'ADRIANNA'
);

$array2 = array(
'ADAIR',
'ADAMINA',
'ADRIANNA'
);

How do I make a third array, without duplicates? We should take first array and remove from it duplicates from second array.

This question is a bit ambiguous. Do you want ADAIR, ADAMINA and ADRIANNA to be in the third array or not? — NullUserException
– NullUserException, Commented Aug 5, 2011 at 14:39

RiaD · Accepted Answer · 2011-08-05 14:26:10Z

6

Use Array-diff

$array3=array_diff($array1,$array2);

Returns an array containing all the entries from array1 that are not present in any of the other arrays.

answered Aug 5, 2011 at 14:26

RiaD

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1 Comment

NullUserException Over a year ago

+1 I think this is what the OP meant, though he could clarify a bit

Terrik · Accepted Answer · 2011-08-05 14:25:15Z

2

Take a look here: http://php.net/manual/en/function.array-unique.php

Combine both arrays into 1, then run them through the array-unique function

$result = array_unique($combined);

answered Aug 5, 2011 at 14:25

Terrik

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2 Comments

NullUserException Over a year ago

@RiaD I think the question is a bit ambiguous; it asks "How do I make a third array, without duplicates?". Well, this answer is perfectly valid then.

Terrik Over a year ago

@RiaD Yeah, I'm still confused by what he actually wants then. . . The bold part was added later, I answered the question as it was asked originally, I think. . .

Janis Veinbergs · Accepted Answer · 2011-08-05 14:33:48Z

0

@grunk deleted a perferctly valid answer, so credits not to me:

$unique = array_unique(array_merge($array1,$array2));

codepad.org/NVkuml5g

answered Aug 5, 2011 at 14:33

Janis Veinbergs

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1 Comment

NullUserException Over a year ago

You'll get a merged version of $array1 and $array2, which doesn't seem to be what the OP wanted.

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