Find the address from the zip code using PowerCMS's CustomObject.

zipsearch.html

<?php
    global $app;
    $q = $app->param( 'q' );
    $q = $app->db()->escape( $q );
    $q = preg_replace( '/[^0-9]/', '', $q );
    if ( $q ) {
        $terms = array( 'name' => $q,
                        'class' => 'postalcode' );
        $extra = array( 'limit' => 1 ); 
        $postalcode = $app->load( 'CustomObject', $terms, $extra );
        if ( $postalcode ) {
            $arr = array( 'zipcode' => $postalcode->name,
                          'address' => $postalcode->body,
                          'status' => '200' );
        } else {
            $arr = array( 'zipcode' => $q,
                          'address' => '',
                          'status' => '404' );
        }
        $json = json_encode( $arr );
        $app->send_http_header( 'application/json; charset=UTF-8', time(), strlen( $json ) );
        echo $json;
        exit();
    }
?>