CODEWITHSUNDEEP
phparrays
jimiss
jimiss

Reputation: 119

comparing two arrays elements, in similar indexes with each other

I have two arrays with same number of members (always)$userInputArr=array("z","z","E","z","z","E","E","E","E","E"); and $user2InputArr=array("a","a","a","z","a","E","E","E","a","E"); I know how to find matching members in two arrays. Here I want to find matching elements with similar indexes e.g. if $userInputArr[4] == $user2InputArr[4], increment $matches. In my attempt below, I loop through both arrays but I cannot get $matchs to increment. 

$match = 0;
for ($c =0; $c < count($$userInputArr); $c++) {
    for ($d = $c; $d<count($user2InputArr);$d++) {
        if ($userAnsStrArr[$c] == $userInputArr[$d]) {
            $match = $match +1;
        }
    }
}

Upvotes: 0

Views: 1551

Answers (5)

Lomesh Kelwadkar
Lomesh Kelwadkar

Reputation: 110

I seems your code not need two for loop increase match in single loop see below code.

<?php
$userInputArr=array("z","z","E","z","z","E","E","E","E","E");
$user2InputArr=array("a","a","a","z","a","E","E","E","a","E");
$match = 0;
for ($c =0; $c < count($userInputArr); $c++) {
    if ($user2InputArr[$c] == $userInputArr[$c]) {
        $match = $match + 1;
    }
}
echo $match;
?>

Upvotes: 0

Milan Chheda
Milan Chheda

Reputation: 8249

Here is the code for you. Just use one foreach, traverse through first array, and check for the key-value in second array. 

$s = array("z","z","E","z","z","E","E","E","E","E"); 
$b = array("a","a","a","z","a","E","E","E","a","E");

foreach($s as $k => $v) {
    if($b[$k] === $s[$k]) {
        echo $k . ' is the index where keys and values exactly match with value as ' . $b[$k];
    }
}

And Output:

3 is the index where keys and values exactly match with value as z
5 is the index where keys and values exactly match with value as E
6 is the index where keys and values exactly match with value as E
7 is the index where keys and values exactly match with value as E
9 is the index where keys and values exactly match with value as E

And here is the link: https://3v4l.org/eX0r4

Upvotes: 0

axiac
axiac

Reputation: 72226

This question is the perfect example for the PHP function array_intersect_assoc():

$array1 = array("z","z","E","z","z","E","E","E","E","E");
$array2 = array("a","a","a","z","a","E","E","E","a","E");

// Find the matching pairs (key, value) in the two arrays
$common = array_intersect_assoc($array1, $array2);
// Print them for verification
print_r($common);

// Count them
$match = count($common);
echo($match." common items.\n");

The output is:

Array
(
    [3] => z
    [5] => E
    [6] => E
    [7] => E
    [9] => E
)
5 common items.

Upvotes: 1

joni hannecke
joni hannecke

Reputation: 11

This works for me

$i = sizeof($userInputArr);

 $match = 0;
for($j = 0; $j < $i; $j++)
    if ($userInputArr[$j] == $user2InputArr[$j]) {
        $match = $match +1;
    }

Upvotes: 0

d3no
d3no

Reputation: 121

$match = 0;
for ($c =0; $c < count($$userInputArr); $c++) {

    if ($userAnsStrArr[$c] == $userInputArr[$c]) {
            $match = $match +1;
        }

}

You should do like this.

Upvotes: 0

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