How to find a different array between the two multidimentional arrays in php

Question

Assume that I have two multidimensional arrays as follows:

Multidimensional array 1 :

$newArray = Array
(
[0] => Array
    (
        [0] => 45521
        [1] => Clothing
        [2] =>  Percent discount
        [3] =>  Get 15% off With Code ABCD15
        [4] =>  2020-05-18
        [5] => 2020-05-31
        [6] => ABCD15
        [7] =>  https://domain[dot]com/AYuANDEqU40
        [8] => Boutique
        [9] => Germany 
    )

[1] => Array
    (
        [0] => 45516
        [1] => Apparel
        [2] =>  Percentage Off
        [3] =>  15% off With Code ABCD15
        [4] =>  2020-05-18
        [5] => 2020-05-31
        [6] => ABCD15
        [7] =>  https://domain[dot]com/AYuANDEqU40
        [8] => Boutique
        [9] => Australia 
    )

[2] => Array
    (
        [0] => 45672
        [1] => Food & Drink
        [2] =>  Free Shipping
        [3] =>  Summer Collection Now. Shop Now!
        [4] =>  2020-05-17
        [5] => 2020-08-01
        [6] => N/A
        [7] =>  https://domain[dot]com/AYuANDEqU40761312
        [8] => Fancy
        [9] => US 
    )

[3] => Array
    (
        [0] => 45866
        [1] => Food & Drink
        [2] =>  Percentage off
        [3] =>  20% Off
        [4] =>  2020-05-17
        [5] => 2026-05-15
        [6] => OFF20
        [7] =>  https://domain[dot]com/AYuANDEqU40780908
        [8] => Biata
        [9] => US 
    )

[4] => Array
    (
        [0] => 45524
        [1] => Health & Wellness
        [2] =>  Other
        [3] =>  Jet's monthly bottle of probiotics. Try it now!
        [4] =>  2020-05-02
        [5] => 2026-05-01
        [6] => N/A
        [7] =>  https://domain[dot]com/AYuANDEqU40758409
        [8] => Jet
        [9] => US 
    )
)
[5] => Array
    (
        [0] => 45524
        [1] => Health & Wellness
        [2] =>  Other
        [3] =>  Jet seasonal probiotics.  No hidden cost.
        [4] =>  2020-05-02
        [5] => 2026-05-01
        [6] => N/A
        [7] =>  https://domain[dot]com/AYuANDEqU40758408
        [8] => Jet
        [9] => US 
    )

Multidimension array 2 :

$oldArray = Array
(
[0] => Array
    (
        [0] => 45521
        [1] => Clothing's
        [2] =>  Percent discount
        [3] =>  Get 15% off With Code ABCD15
        [4] =>  2020-05-18
        [5] => 2020-05-31
        [6] => ABCD15
        [7] =>  https://domain[dot]com/AYuANDEqU40
        [8] => Boutique
        [9] => Germany 
    )

[1] => Array
    (
        [0] => 45516
        [1] => Apparel
        [2] =>  Percentage Off
        [3] =>  15% off With Code ABCD15
        [4] =>  2020-05-18
        [5] => 2020-05-31
        [6] => ABCD15
        [7] =>  https://domain[dot]com/AYuANDEqU40
        [8] => Boutique
        [9] => Australia 
    )

[2] => Array
    (
        [0] => 45672
        [1] => Food & Drink
        [2] =>  Free Shipping
        [3] =>  Summer Collection Now. Shop Now!
        [4] =>  2020-05-17
        [5] => 2020-08-01
        [6] => N/A
        [7] =>  https://domain[dot]com/AYuANDEqU40761312
        [8] => Fancy
        [9] => US 
    )

[3] => Array
    (
        [0] => 45866
        [1] => Food & Drink
        [2] =>  Percentage off
        [3] =>  20% Off
        [4] =>  2020-05-17
        [5] => 2026-05-15
        [6] => OFF20
        [7] =>  https://domain[dot]com/AYuANDEqU40780908
        [8] => Biata
        [9] => US 
    )

[4] => Array
    (
        [0] => 45706
        [1] => Electronic Equipment
        [2] =>  Percentage off
        [3] =>  40% Off-Set Under $200!
        [4] =>  2020-05-17
        [5] => 2026-05-15
        [6] => N/A
        [7] =>  https://domain[dot]com/AYuANDEqU40768379
        [8] => GVM
        [9] => US 
    )
) 

You can easily see that the $newArray has one different array([4]) from the $oldArray , and one new array([5]) to the $oldArray , and one different key=value pair like [1] => Clothing's from the $oldArray

What i am expecting is to compare the $newArray with the $oldArray to get the different array([4]) and the new one array([5]) in the $newArray only.

I have searched for these links:

https://www.php.net/manual/en/function.array-diff-assoc.php and https://www.w3schools.com/php/func_array_diff_assoc.asp but they do not help.

Then I've searched for the function in this link: Compare two different multidimentional arrays and highlight the changes

The function:

function arrayRecursiveDiff($aArray1, $aArray2) { 
$aReturn = array(); 

foreach ($aArray1 as $mKey => $mValue) { 
    if (array_key_exists($mKey, $aArray2)) { 
        if (is_array($mValue)) { 
            $aRecursiveDiff = arrayRecursiveDiff($mValue, $aArray2[$mKey]); 
            if (count($aRecursiveDiff)) { $aReturn[$mKey] = $aRecursiveDiff; 
        } 
    } else { 
        if ($mValue != $aArray2[$mKey]) { 
            $aReturn[$mKey] = $mValue; 
        } 
    } 
    } else { 
        $aReturn[$mKey] = $mValue; 
    } 
} 

return $aReturn; 
} 

$arr1 = arrayRecursiveDiff($newentry,$oldentry);

It filters and shows me both the COMPLETE new arrays from the $newArray and the new arrays from the $newArray with only the key=value pairs that are different from the $oldArray .

Yes and again, what i am expecting is to compare the $newArray with the $oldArray to get:

1/ The COMPLETE different array like array([4]) from the $newArray . 2/ The new array like array([5]) from the $newArray . 3/ The arrays from the $newArray of which one of the key=value pairs is different from that of the $oldArray , but it must print all 9 key=value pairs of that array, which is the array[0] in this example. I don't want to get the new arrays from $newArray with the output of ONLY the updated key=value pairs.

Sorry for a long post with wordy explanation, but I have no choice.

Your help is appreciated.

Answer 1

$a1=array(1,2,3);
$a2=array(1,2,4);

$i =0;
$diff_Value = ''; 
foreach( $a1 as $val )
{
    if($a2[$i]!=$val){
        $diff_Value.= $val.','.$a2[$i];
    }
    $i =$i+1;
}


echo $diff_Value;