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Update specific value of key in multidimensional array

i have tried some several way of updating specific array at specific depth in multidimensional array. Although i am able to update but it is not modifying the original array. Even though i tried the referencing technique of php but it seems odds are not in my favour.

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let's say, the above array is in function A and i passed that above array, which lets say is $tree[$i]['child'], like below:

function A($tree) {
   $i = 5;
   $childArr = &$tree[$i]['child'];
   $childArr = findandReplace($childArr);
   dump($childArr); // still same nothing changed at that specific index of array 
}

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I was successfully able to find Specific array using

function findandReplace($array) {

        // Loops through each element. If element again is array, function is recalled. If not, result is echoed.
        foreach($array as $key=>$value)
        { 
            if(is_array($value))
            { 
                findandReplace($value); 
            }
            else{
                if ($key == 'clientCode' && $value == '06459') {
                    // echo $key." = ".$value."<br />\n";
                    $array['individualCommission'] = '10000000000000';                    
                    break;
                }
            } 
        }

        return $array;
    }

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so above example i was targeting the array with clientCode = 06459 and if found i was updating its individualCommission key to some value. if i do dump after updating with $array['individualCommission'] = '10000000000000';, it seems, i was able to successfully update it. but unfortunately original array is still same hence unmodified.

Another try i did, it updated that specific array and return that specific array only and i lost all other arrays of multidimensional array.

function findandReplace($array) {    
        $parent = &$array;
        $iterator = new \RecursiveIteratorIterator( new \RecursiveArrayIterator($array), \RecursiveIteratorIterator::SELF_FIRST );
        // $result = array();
        foreach ($iterator as $key => $item) {
            if ( $key === 'clientCode' && $item == '06459') {

                $parent = (array)$iterator->getInnerIterator();
                $parent['individualCommission'] = '1000000000000000';
                // $array[3]['child'][1]['child'][1]['individualCommission'] = $parentCommission;
                break;
            }
        }
        return $array;

    }

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so i will appreciate if anyone would spare some time and find any solution for this simple problem.

Thanks!

Julian Hansen

In a foreach your items are by default value parameters - you need to make the reference so you change this

 foreach($array as $key=>$value)

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To this

 foreach($array as $key=>&$value)

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Note the '&' in front of the $value - this tells PHP to treat $value as a reference to the value and not the value itself.

Danish Raza

ASKER

Hey @Julian thank you for your reply. but if you observed closely in my case i am updating particular $array after verifying if key is clientCode and $value matches clientCode as well.
see this

if ($key == 'clientCode' && $value == '06459') {
                    // echo $key." = ".$value."<br />\n";
                    $array['individualCommission'] = '10000000000000';                    
                    break;
                }

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so this is where i am updating "individualCommission" key of that particular array. Although in functionA i did pass this array as refrence.

I tried your comment but i didn't effect anything!

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Danish Raza

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Julian Hansen

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Danish Raza

ASKER

Hi @Julian Hansen yes but if i do not write additional

findandReplace(&$array)

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refrence in function params then it doesn't save back!! It seems to me very weird though but i believe it is because of recursion

Julian Hansen

Sorry but you implemented a change I recommended on line 2 of your latest code - that was the reason your code was not working NOT BECAUSE OF RECURSION

You were calling this

findandReplace($value);

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With a value parameter

Changing the $value to &$value in the for loop is what was needed to fix the code - which I recommended, you implemented and now it is working.

I don't understand why you are saying you did not get a solution!

Danish Raza

ASKER

why don't you go ahead and try what you commented about & sign next to $value. you did provide aid to solution for which i am thankful. but indeed your recommendation didn't solve my problem. also it is not the case that i didn't think of putting & sign in foreach. i did try myself many other combinations!

I will admit i just luckily solve it while tracing and putting a & in function findandreplace()

Julian Hansen

Try calling findandreplace(&$array) with your foreach set to $value - it won't work.

also it is not the case that i didn't think of putting & sign in foreach. i did try myself many other combinations!

You never mentioned this in your OP.

Anyway I wish you well with your project

Danish Raza

ASKER

thanks for help @Julian. Highly appreciated your effort!!

Danish Raza

ASKER

problem solved!