Multidimensional Array Find and Update the Value in specific index using php

Question

I've a following Multidimensional array named $data

and

$amount =10;
$index = 2  // selected array index for change

The above information i have and i need to update the array with new [AvailableBalance] based on below calculations.

Next i need to get the [AvailableBalance] from the array $index (index 2 )

$existing_available = 25;

Subtract the $amount from $existing_availablet

$remaining_amount = 15; // where ($existing_available - $amount)

Update the [AvailableBalance] = 15($remaining_amount) using array $index (index2).

so my final array look like below:

Please help me to try this issue.

I am new in php and stack overflow.

Thanks in advance..

aslawin · Accepted Answer · 2016-02-18 06:44:30Z

2

There is solution:

$index = 2;
$amount = 10;

$existing_available = $data[$index]['AvailableBalance']; //25

$remaining_amount = $existing_available - $amount; //15

//update AvailableBalance of 2nd array
$data[$index]['AvailableBalance'] = $remaining_amount;

Working example (other fields are ommitted for simplicity): CLICK

edited Feb 18, 2016 at 6:44

answered Feb 18, 2016 at 6:28

aslawin

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4 Comments

Mr. Engineer Over a year ago

Sorry but this will not work. It will append new value under index 2.

aslawin Over a year ago

It works ok, I added working example, just click "Execute code" button to see result.

Mr. Engineer Over a year ago

Oh yes.Previously it was not working. I think i had missed something. Good luck. +1.

Karthik N Over a year ago

Instead of declaring a new variable you can update it with a same array values.

Karthik N · Accepted Answer · 2016-02-18 06:55:37Z

0

If you calculate the array index and amount($index, $amount) then update the values directly to the array $data,

$index = 2;
$amount = 10;     
$data[$index]['AvailableBalance'] = $data[$index]['AvailableBalance'] - $amount;

edited Feb 18, 2016 at 6:55

answered Feb 18, 2016 at 6:46

Karthik N

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Comments

Mr. Engineer · Accepted Answer · 2016-02-18 06:40:03Z

0

Try this :

$index=2;
$amount=10;
foreach($result as $key => $subarray) {
   if($key == $index) { //change this key according to your requirements.
      foreach($subarray as $subkey => $subsubarray) {
         if($subkey == "AvailableBalance") {
             $result[$key][$subkey] = $subsubarray-$amount;
         }
      }
   }
}

Demo : https://eval.in/520720

edited Feb 18, 2016 at 6:40

answered Feb 18, 2016 at 6:28

Mr. Engineer

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8 Comments

Albert Over a year ago

Sorry this is not working.It will append new value for all under index 2

Mr. Engineer Over a year ago

have you seen my demo? And also check my updated answer.

Albert Over a year ago

Thanks Mr.Engineer. it's Working Perfectly.

Karthik N Over a year ago

Why do you want to loop? while you can update the array values values directly based on the index.

Mr. Engineer Over a year ago

@aslawin OP didn't write that $index and $amount are values based on calculations. Please read it carefully. OP have this information (just for example) and want to update an array.

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