curl_cep

<?php
@header( 'Content-Type: text/html; charset=iso-8859-1' );
$cep = $_POST['cep'];
$url = "http://xtends.com.br/webservices/cep/json/$cep/";
$ch = curl_init();
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
echo curl_exec($ch);
curl_close($ch);