How to compare two arrays and remove matching elements from one for the next loop?

Question

How else might you compare two arrays ($A and $B )and reduce matching elements out of the first to prep for the next loop over the array $A?

$A = array(1,2,3         


        

Answer 1

Dear easy and clean way

$clean1 = array_diff($array1, $array2); 
$clean2 = array_diff($array2, $array1); 
$final_output = array_merge($clean1, $clean2);

Answer 2

Hey, even better solution: array _ uintersect. This let's you compare the arrays as per array_intersect but then it lets you compare the data with a callback function.

Answer 3

See also array_unique. If you concatenate the two arrays, it will then yank all duplicates.

Answer 4

Try to this

$a = array(0=>'a',1=>'x',2=>'c',3=>'y',4=>'w');
$b = array(1=>'a',6=>'b',2=>'y',3=>'z');
$c = array_intersect($a, $b);

$result = array_diff($a, $c);
print_r($result);

Answer 5

You've got it. Just use array_diff or array_intersect. Doesn't get much easier than that.

Edit: For example:

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

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