builder.php

<?php

class Address
{
    public function __construct(
        $street1,
        $street2,
        $city,
        $state,
        $zip,
        $country
    ) {
        $this->street1 = $street1;
        $this->street2 = $stree2;
        $this->city = $city;
        $this->state = $state;
        $this->zip = $zip;
        $this->country = $county;
    }
}

class AddressBuilder
{
    protected $street1 = null;
    protected $street2 = null;
    protected $city = null;
    protected $state = null;
    protected $zip = null;
    protected $country = null;

    public function setStreet1($value)
    {
        $this->street1 = $value;

        return $this;
    }

    public function setStreet2($value)
    {
        $this->street2 = $value;

        return $this;
    }

    public function setCity($value)
    {
        $this->city = $value;

        return $this;
    }

    public function setState($value)
    {
        $this->state = $value;

        return $this;
    }

    public function setZip($value)
    {
        $this->zip = $value;

        return $this;
    }

    public function setCountry($value)
    {
        $this->country = $value;

        return $this;
    }

    public function build()
    {
        return new Address(
            $this->street1,
            $this->street2,
            $this->city,
            $this->state,
            $this->zip,
            $this->country
        );
    }
}

// What does this even?
$address1 = new Address('123 Main St.', null, null, null, 27701, null);

// Obviously
$builder = new AddressBuilder();
$address2 = $builder
    ->setStreet1('123 Main St.')
    ->setZip(27701)
    ->build();