<?php
 
class usps {
 
		public $account = 'xxxxxxx'; //you need to register for this
		public $url = 'http://production.shippingapis.com/ShippingAPI.dll';
		public $address1, $address2, $city, $state, $zip;
		public $ship_address1, $ship_address2, $ship_city, $ship_state, $ship_zip;
 
	function toXML() {
		$xml = ' <AddressValidateRequest USERID="' . $this->account . '"><Address ID="1">';
		$xml .= '<Address1>' . $this->address1 . '</Address1>';
		$xml .= '<Address2>' . $this->address2 . '</Address2>';
		$xml .= '<City>' . $this->city . '</City>';
		$xml .= '<State>' . $this->state . '</State>';
		$xml .= '<Zip5>' . $this->zip . '</Zip5>';
		$xml .= '<Zip4></Zip4></Address>';
 
		if ($this->ship_address2 <> ''){
			//shipping address
			$xml .= '<Address ID="2">';
			$xml .= '<Address1>' . $this->ship_address1 . '</Address1>';
			$xml .= '<Address2>' . $this->ship_address2 . '</Address2>';
			$xml .= '<City>' . $this->ship_city . '</City>';
			$xml .= '<State>' . $this->ship_state . '</State>';
			$xml .= '<Zip5>' . $this->ship_zip . '</Zip5>';
			$xml .= '<Zip4></Zip4></Address>';
			}
 
		$xml .= '</AddressValidateRequest>';
 
     return $xml;
     }
 
	function submit_request() {
 
		$ch = curl_init($this->url);
		curl_setopt($ch, CURLOPT_POST, 1);
		curl_setopt($ch, CURLOPT_POSTFIELDS, "API=Verify&XML=" . $this->toXML());
		curl_setopt($ch, CURLOPT_TIMEOUT, 60);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		//curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false);
 
		$result = curl_exec($ch);
		$error = curl_error($ch);
 
		if(empty($error)) {
			return $result;
		}else{
			die(curl_error($ch));
		}
	}
}
 
?>

 
<?php
 
 
require("usps_address_class.php");
$uspsRequest = new usps(); //class instantiation
$uspsRequest->address1 = 'suite 321';
$uspsRequest->address2 = '1600 Pennsylvania Ave NW';
$uspsRequest->city = 'Washington';
$uspsRequest->state = 'DC';
$uspsRequest->zip = '20500';
/*
//optional second address
$uspsRequest->ship_address1 = '';
$uspsRequest->ship_address2 = '';
$uspsRequest->ship_city = '';
$uspsRequest->ship_state = '';
$uspsRequest->ship_zip = '';
*/
 
$result = $uspsRequest->submit_request();
 
if (!empty($result)){
		$xml = new SimpleXMLElement($result);
	}else{
		die;
	}
 
 
if(isset($xml->Address[0]->Error)) { echo ' Error Address 1';}
if(isset($xml->Address[1]->Error)) { echo ' Error Address 2';}
 
echo $xml->Address[0]->Address2 . ' ' . $xml->Address[0]->Address1 ;
echo '<br />';
echo $xml->Address[0]->City. ' ' . $xml->Address[0]->State  . ' ' . $xml->Address[0]->Zip5;
echo '<br />';
echo $xml->Address[1]->Address2 . ' ' . $xml->Address[1]->Address1 ;
echo '<br />';
echo $xml->Address[1]->City. ' ' . $xml->Address[1]->State  . ' ' . $xml->Address[1]->Zip5;
 
?>