PHP - How to compare two arrays and remove duplicate values

Question

So this is whats bothering me.

I have two arrays:

$array1 = array('[param1]' ,'demo' ,'[param2]' ,'some' ,'[param3]'); $array2 = array('value1'   ,'demo' ,'value2'   ,'some' ,'value3'); 

Now I want to compare these two array's, and remove all duplicate values.
At the end I want this two array-s but without 'demo' and 'some' values in them.
I want to remove all values from array-s that have the same index key and value.
Array's will always have same number of values and indexes, I only want to compare them and remove entries that have the same index key and value, from both of them.

I'm doing something like this now:

$clean1 = array(); $clean2 = array();      foreach($array1 as $key => $value) {     if($value !== $array2[$key])     {         $clean1[$key] = $value;         $clean2[$key] = $array2[$key];     } }  var_export($clean1); echo "<br />"; var_export($clean2); 

And this works! But im wondering is there any other way of doing this? Maybe without using foreach loop? Is there more elegant way of doing this?

Answer 1

You can use the function array_diff in PHP that will return and array containing the keys that are the same between the two arrays.

$clean1 = array_diff($array1, $array2); 

http://php.net/manual/en/function.array-diff.php

Answer 2

array_unique( array_merge($arr_1, $arr_2) ); 

or you can do:

$arr_1 = array_diff($arr_1, $arr_2); $arr_2 = array_diff($arr_2, $arr_1); 

i guess...