How to filter array and create new array

Question

I have two arrays: array1=(1,2,3,4) and array2=(1,2,5,6)

I need to create array3 which contain only those value which lie in array2 not in array1. So my array3 will be array3(5,6).

So, do you have any code that tries to do that? Otherwise, it'll be difficult to help you out. — Alfabravo, Jan 30 '15 at 12:35
Have you looked at [array_diff()](http://www.php.net/manual/en/function.array-diff.php) at all? The PHP manual is there for a reason.... telling us what we can do with PHP, and how to do it! — Mark Baker, Jan 30 '15 at 12:36
Possible duplicate of: http://stackoverflow.com/questions/8691329/php-how-to-compare-two-arrays-and-remove-duplicate-values — AgeDeO, Jan 30 '15 at 12:36
Didn't know SO now does people's work. Sorry about the rant but sometimes, people go too far to get some rep. — Alfabravo, Jan 30 '15 at 13:06

score 1 · Accepted Answer · answered Jan 30 '15 at 12:38

1

try using array_diff() like this:

<?php
$array1=array(1,2,3,4);
$array2=array(1,2,5,6);

print_r(array_diff($array2,$array1));// to reinitialize key use array_values().
?>

answered Jan 30 '15 at 12:38

Suchit kumar

score 0 · Answer 2 · answered Jan 30 '15 at 12:35

0

You need the function array_diff() http://php.net/array_diff

$a1 = array(0 => "a", 1 => "b", 2 => "c");
$a2 = array(3 => "c", 4 => "b", 5 => "d");
print_r(array_diff($a1,$a2));
//Array (
//  [0] => a
//)

answered Jan 30 '15 at 12:35

Phate01

score 0 · Answer 3 · answered Jan 30 '15 at 12:41

You can do it the below way

$array1=array (1,2,3,4);
$array2=array (1,2,5,6);
$result = array_diff ( $array1 , $array2);
echo "<pre>";print_r($result);exit;

This will output

Array
(
    [2] => 3
    [3] => 4
)

If you want to reindex array you can use below code

array_values($result);

Output:

Array
    (
        [0] => 3
        [1] => 4
    )

score 0 · Answer 4 · answered Jan 30 '15 at 12:46

0

This is the solution:

<?php

$a = array(0=> 1, 1 => 23, 2 => 3);
$b = array(0=> 1, 1 => 23, 2 => 3, 3=> 5, 4=> 10);
$c = array_diff($b, $a);
var_dump($c);
?>

Output:

array (size=2)
  3 => int 5
  4 => int 10

answered Jan 30 '15 at 12:46

Abel

4 Answers4