Form a new array with mismatched elements of two arrays in php

Question

I am new in PHP and now i'm facing a problem with arrays. I have two sets of arrays.I want to form a result array which contains all the mismatched elements in both the array.

eg:

array1=Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) 

array2=Array ( [0] => 1 [1] => 2 [2]=>9)

result array what i'm expecting should be

result array=Array([0] => 3 [1] => 4 [2] => 5 [3] => 9 )

Answer 1

Use array_diff and array_merge

$array1 = [1,2,3,4,5];
$array2 = [1,2,9];

$diff1 = array_diff($array1, $array2); //Find difference element in 1st array
$diff2 = array_diff($array2, $array1); //Find difference element in 2nd array

print_r(array_merge($diff1, $diff2)); // Merge the results

Result:

Array
(
    [0] => 3
    [1] => 4
    [2] => 5
    [3] => 9
)

In one line:

print_r(array_merge(array_diff($array1,$array2),array_diff($array2,$array1));

---

Update 1 : From the comments

It is because, your array values has spaces . Just trim out:

Use

$array1 = array_map("trim", $prev_array); 
$array2 = array_map("trim", $checked_array); 

Instead of:

$array1 = $prev_array; 
$array2 = $checked_array;

Answer 2

Get elements from both arrays that are not present in the other. Then merges the results.

array_merge(array_diff($array1, $array2), array_diff($array2, $array1))