How to create a new key and store array values in a multidimensional way PHP

Question

I have data here: First, the result of my first function named getsiteaccounts()

Array
(
[0] => Array
    (
        [SiteID] => 2
        [AID] => 5
    )

[1] => Array
    (
        [SiteID] => 2
        [AID] => 3
    )
[2] => Array
    (
        [SiteID] => 6
        [AID] => 4
    )

And the result of my second function named bindGHComponentsToSites()

   Array
  ( 
  [2] => Array
    (
        [SiteID] => 2
        [Balance] => 19000.00
        [MinBalance] => 100000.00
        [MaxBalance] => 1000000.00
        [OwnerAID] => 5
        [GroupID] => 1
        [Deposit] => 1500
        [Reload] => 1000
        [Redemption] => 1000
    )

)

Then, add the key of [CorpAID] pointing to the list of OwnerAID. BY the way, OwnerAID and AID are the same. As you can see SiteID => 2 owned by two OwnerAID => 5 and 3. Here's should be the result:

   Array([0])=> Array (
        [SiteID] => 2
        [Balance] => 19000.00
        [MinBalance] => 100000.00
        [MaxBalance] => 1000000.00
        [OwnerAID] => 5
        [GroupID] => 1
        [Deposit] => 1500
        [Reload] => 1000
        [Redemption] => 1000
        [CorpAID] => Array(
                   [0] => 5
                   [1] => 3
        )
      )
  )

The SiteID => 6 should not be print since it only owned by one AID. Is it possible to make it? Please guide me in proper way. Thank you in advance.

Answer 1

You can use a couple of foreach loops to do what you need:

<?php

$siteAccounts = array(
  array('SiteID'=>2, 'AID'=>5),
  array('SiteID' => 2, 'AID' => 3),
  array('SiteID' => 6, 'AID' => 4)
);

$componentsToSites = array(array(
  'SiteID' => 2,
  'Balance' => 19000.00,
  'MinBalance' => 100000.00,
  'MaxBalance' => 1000000.00,
  'OwnerAID' => 5,
  'GroupID' => 1,
  'Deposit' => 1500,
  'Reload' => 1000,
  'Redemption' => 1000
));

foreach ($componentsToSites as &$site) {
  $aids = array();
  foreach ($siteAccounts as $acct) {
      if ($acct['SiteID'] === $site['SiteID'])
        $aids[] = $acct['AID'];
  }
  $site['CorpAID'] = $aids;
}

print_r($componentsToSites);

Edit:

My original answer used array_walk rather than foreach , but due to compatibility issues I switched it. Here is the original code snippet for using array_walk :

array_walk($componentsToSites, function (&$site) use ($siteAccounts) {
  $aids = array();
  array_walk($siteAccounts, function ($acct) use ($site, &$aids) {
      if ($acct['SiteID'] === $site['SiteID'])
        $aids[] = $acct['AID'];
  });
  $site['CorpAID'] = $aids;
});