write a function to find and replace element in an array

SeamlessHR technical test

<?php

$banks =
[
   'United Bank For Africa' => 'UNITED BANK FOR AFRICA PLC',
   'Access Bank Plc' => 'ACCESS BANK PLC',
   'Gtb' => 'GUARANTY TRUST BANK PLC',
   'Firstbank Nigeria plc' => 'FIRST BANK OF NIGERIA PLC'
];

$employees =
[[    
  'ID' => 1,
  'State' => 'Lagos',
  'Bank' => 'Access',
  'Type' => 'full time'
 ],
[   
  'ID' => 2,
  'State' => 'Lagos',
  'Bank' => 'Gtb',
  'Type' => 'full time'
 ]];

//Can you Match the bank name in the employee's array with the right Bank Name and return as JSON

function full_bank_name($arr, $banks)
{
  $ret = array();
  foreach($arr as $ar){
      $ar['Bank'] = $banks[$ar['Bank']];
      array_push($ret, $ar);
  }
  return $ret;
}

print_r(full_bank_name($employees, $banks));

$banks =array(
'UBA' => 'UNITED BANK FOR AFRICA PLC',
'Access' => 'ACCESS BANK PLC',
'Gtb' => 'GUARANTY TRUST BANK PLC',
'Firstbank' => 'FIRST BANK OF NIGERIA PLC'
);
$employees =
[array(
'ID' => 1,
'State' => 'Lagos',
'Bank' => 'Access',
'Type' => 'full time'
),
array(
'ID' => 2,
'State' => 'Lagos',
'Bank' => 'Gtb',
'Type' => 'full time'
)
];

//Can you Match the bank name in the employee's array with the right Bank Name and return as JSON

function full_bank_name($arr)
{
$ret = array();
foreach($arr as $ar){
$ar->Bank = $banks[$ar->Bank];
array_push($ret, $ar);
}
return $ret;
}

$banks =array(
'UBA' => 'UNITED BANK FOR AFRICA PLC',
'Access' => 'ACCESS BANK PLC',
'Gtb' => 'GUARANTY TRUST BANK PLC',
'Firstbank' => 'FIRST BANK OF NIGERIA PLC'
);
$employees =
[array(
'ID' => 1,
'State' => 'Lagos',
'Bank' => 'Access',
'Type' => 'full time'
),
array(
'ID' => 2,
'State' => 'Lagos',
'Bank' => 'Gtb',
'Type' => 'full time'
)
];

//Can you Match the bank name in the employee's array with the right Bank Name and return as JSON

function full_bank_name($arr)
{
$ret = array();
foreach($arr as $ar){
$ar->Bank = $banks[$ar->Bank];
array_push($ret, $ar);
}
return $ret;
}