Complex function wrapper

funcwrapper.php

<?php

class ParamsWrapper
{
  public $name;
  public $email;
  public $orderDate;
  public $orderNumber;
  public $timeZone;
  public $xorParam = false;
  public $otherXorParam = false;
  
  private $_badConstructor = false;
  private $errors = [];
  
  public function is_valid()
  {
    public function __construct(...$params)
    {
      // do any needed type checking here
      if ($type_check_fails) {
        $this->_badConstructor = true;
        $this->errors[] = 'The constructor failed';
      }
    }
    // required fields
    if (!isset(
      $this->name,
      $this->email,
      $this->orderDate,
      $this->orderNumber
    )) {
      $this->errors[] = 'Missing required parameters';
      return false;
    }
    
    if (!$this->xorParam xor $this->otherXorParam) {
      $this->errors[] = 'One must be set, but not both';
      return false;
    }
  }
    
  public function getErrors()
  {
    return $this->errors;
  }
}

function doSomethingComplex(ParamsWrapper $params)
{
  if (!$params->is_valid()) {
    // handler error
  }
}

This would only make sense for methods with very large signatures