array_filter() nested arrays using an external value

php_pluck.php

s<?php

function pluck($nestedArray, $key, $value, $maintainKeys=true){
    $func = 'return ($obj["' . $key . '"] == "' . $value . '") ? true : false;';
    $callback = create_function('$obj', $func);
    $filtered = array_filter($nestedArray, $callback);
    return ($maintainKeys) ?  $filtered : array_values($filtered);
}

$users = [
    [
		'fname' => 'Philip',
		'lname'=>'Damra',
		'email'=>'mail@mail.com'
	],
	[
		'fname' => 'Joe',
		'lname'=>'Davis',
		'email'=>'email@mail.com'
	],
	[
		'fname' => 'Heather',
		'lname'=>'Damra',
		'email'=>'hmail@mail.com'
	]
];

print_r(pluck($users, 'lname', 'Damra'));
print_r(pluck($users, 'lname', 'Damra', false));
/*
    note keys:
    Array
    (
     [0] => Array
     (
      [fname] => Philip
      [lname] => Damra
      [email] => mail@mail.com
      )
     
     [2] => Array
     (
      [fname] => Heather
      [lname] => Damra
      [email] => hmail@mail.com
      )
     
     )
    Array
    (
     [0] => Array
     (
      [fname] => Philip
      [lname] => Damra
      [email] => mail@mail.com
      )
     
     [1] => Array
     (
      [fname] => Heather
      [lname] => Damra
      [email] => hmail@mail.com
      )
     
     )

*/