How to remove an array value from another array using PHP question

Question

I want to check if any of the array values from example 1 are in example 2 and remove them from example 2 if they are. How would I be able to do this using PHP?

Example 1

Array
(
    [0] => 3
    [1] => 5
)

Example 2

Array
(
    [0] => 3
    [1] => 3
    [2] => 4
    [3] => 4
    [4] => 4
    [5] => 3
    [6] => 3
    [7] => 3
    [8] => 4
    [9] => 4
    [10] => 4
    [11] => 3
)

Core Xii · Accepted Answer · 2010-10-12 16:03:26Z

9

$example2 = array_diff($example2, $example1)

answered Oct 12, 2010 at 16:03

Core Xii

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Comments

gen_Eric · Accepted Answer · 2010-10-12 16:04:24Z

7

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

array_diff computes the difference between arrays. It returns an array containing all the entries from the first array that are not present in any of the other arrays.

answered Oct 12, 2010 at 16:04

gen_Eric

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Comments

Conner · Accepted Answer · 2012-08-20 05:24:11Z

0

foreach($example2 as $key => $value) {
   foreach($example1 as $key1 => $value1) {
      if ($value1 == $value) {
         unset($example2[$key])
      }
   }
}

edited Aug 20, 2012 at 5:24

Conner

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answered Oct 12, 2010 at 16:04

Doug Molineux

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