Usually when you want to validate if the parameters you are receiving from a client has valid keys, you use a foreach to compare each parameter key with an array of valid keys, but this way is shorter and faster.

validate.php

<?php

$invalidParameters = ['Key_1' => 1, 'Key_2' => 2, 'No_valid' => 3];
$validParameters = ['Key_1' => 1, 'Key_2' => 2];

function validParameters($parameters) {
  $validKeys = ['Key_1', 'Key_2', 'Key_3', 'Key_4'];
  $keys = array_keys($parameters);

  return array_diff($keys, $validKeys) ? false : true;
}

var_dump(validParameters($invalidParameters), validParameters($validParameters)); // bool(false), bool(true)