httpRule.php

<?php
require_once 'src/KerioControlApi.php';

$api = new KerioControlApi('Setup Custom HTTP Rule', 'Miroslav Osladil', '1.0');

try {
  $session = $api->login('fw.company.local', 'username', 'password');

	/* get current http rules */
	$result = $api->sendRequest('HttpPolicy.get');
	$rulesList = $result['list'];
	
	/* create a new rule */
	$newRule = array(
		'enabled' => TRUE,
		'name' => 'My HTTP Rule',
		'description' => 'My HTTP rule which disables example.com',
		'urlCondition' => array(
			'type' => 'UrlString',
			'url' => 'example.com'),
		'action' => 'Deny',
		'denialCondition' => array(
			'denialText' => 'Sorry, access to example.com is not allowed!',
			'canUnlockRule' => TRUE)
	);
	$rulesList[] = $newRule;
	
	/* save rules list */
	$params = array('rules' => $rulesList);
	$api->sendRequest('HttpPolicy.set', $params);
}
catch (KerioApiException $e) {
	print $e->getMessage();
}

if (isset($session)) $api->logout();