Merging An Array in PHP

Question

Possible Duplicate:
PHP merge array(s) and delete double values

I need to merge two arrays. I know I can use the array_merge function.

But it displays all the elements in both the arrays. But I need to replace all the similar values with a single value instead of all the values.

For example

$array1 = array("2", "3", "4");
$array2 = array("2", "7", "8");

If I use the array_merge function above the output will be 2,3,4,2,7,8 but I want it to be 2,3,4,7,8. I mean the value two should not repeat again. I hope there is a function to do my task. Please point it out to me

why do you put double quotes around int values? – TigerTiger Jun 18 '12 at 12:21 — TigerTiger, Jun 18 '12 at 12:21

score 8 · Answer 1 · edited Jun 18 '12 at 18:35

8

First use array_merge, then use array_unique.

edited Jun 18 '12 at 18:35

answered Jun 18 '12 at 12:20

Ben F

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When including function names in inline code it is a nice touch to wrap the backticked function names in a link to its PHP doc page. The best part is you don't even have to google for the URL. Click the create link button and place `php.net/(function name)` after the `http://`. – Bailey Parker Jun 18 '12 at 12:34
@PhpMyCoder: Thanks, I didn't know if I could link code blocks, so now I know. – Ben F Jun 18 '12 at 12:38

score 3 · Answer 2 · answered Jun 18 '12 at 12:21

3

function array_fusion($ArrayOne, $ArrayTwo)
{
    return array_unique(array_merge($ArrayOne, $ArrayTwo));
}

answered Jun 18 '12 at 12:21

Chris

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score 1 · Answer 3 · edited Jun 18 '12 at 12:31

1

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

edited Jun 18 '12 at 12:31

Bailey Parker

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answered Jun 18 '12 at 12:21

FabioCosta

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When writing code in an answer or post on SO, be sure to indent it with four spaces so that it is recognized as such and is properly highlighted. – Bailey Parker Jun 18 '12 at 12:31

score 1 · Answer 4 · answered Jun 18 '12 at 12:21

1

You could use the following function :

$result = array_unique($input);

This will remove the duplicate values in your $input array. So apply the array_merge first, then the array_unique function i think.

answered Jun 18 '12 at 12:21

Haroon

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score 0 · Answer 5 · answered Jun 18 '12 at 12:22

0

use it the way you do now but on the line after the merts use http://php.net/manual/en/function.array-unique.php

answered Jun 18 '12 at 12:22

Jan-Willem Hoekman

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score 0 · Answer 6 · answered Jun 18 '12 at 12:26

Just in case anyone ever finds this useful or is simply curious, you can also do two array flips. the first flip causes dupes to drop out when it creates unique keys from the values. Flipping again restores it to something useful. PHP always has numerous ways to get things done.

$arrays = array_flip(array_flip(array_merge($array1,$array2)));

Granted, array_unique is the more elegant and correct way to do this.

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

Merging An Array in PHP

6 Answers6