SurvoSms.php

<?php
/**
 *
 * Example
 */
class Survo_To_Sms
{   
    /**
     * @var array $_IvrOptions
     */
    private $_IvrOptions = array();
    
    /**
     * @var array $_ApiOptions
     */
    private $_ApiOptions = array(
        'action' => 'sms.send_message',
        'api_key' => 'YOURAPIKEY'
    );
    
    const ENDPOINT = 'ibp_api.php?';
    const BASE = 'http://secure.ifbyphone.com/';
    
    /**
     *
     * Class construct
     *
     * @param array $options
     *
     * @return void
     */
    public function __construct(array $options)
    {
        $this->_setOpts($options);
    }
    
    /**
     *
     * Set options from IVR
     *
     * @param array $options
     *
     * @return void
     */
    private function _setOpts($options)
    {
        if ($options['answer'] == 1) {
            $this->_IvrOptions['answer'] = (int)$options['answer'];
        }
        if (strlen((int)$options['cid'] == 10)) {
            $this->_IvrOptions['cid'] = (int)$options['cid'];
        }
    }
    
    /**
     *
     * Set SMS message
     *
     * @param string $message
     *
     * @return void
     */
    public function setMessage($message)
    {
        $this->_ApiOptions['message'] = (string)$message;
    }
    
    /**
     *
     * Set SMS from number
     *
     * @param int $from
     *
     * @return void
     */
    public function setFrom($from)
    {
        $this->_ApiOptions['message'] = (int)$from;
    }
    
    /**
     *
     * Set SMS to number
     *
     * @param int $to
     *
     * @return void
     */
    public function setTo($to) 
    {
        $this->_ApiOptions['to'] = (int)$to;
    }
    
    /**
     *
     * Process business rules
     *
     * @return mixed
     */
    private function _processLogic()
    {
        if ($this->_IvrOtions['answer']) {
            $this->_request();
        }
    }
    
    /**
     *
     * Perform web request
     *
     * @return mixed
     */
    private function _request()
    {
        $response = file_get_contents($this->_getUrl());
        return $this->_process($response);
    }
    
    /**
     *
     * Assemple API url for request
     *
     * @return string
     */
    private function _getUrl()
    {
        $url = self::BASE . self::ENDPOINT . http_build_query($this->_ApiOptions);
        return (string) $url;
    }
    
    /**
     *
     * Process web request result
     *
     * @param string $response
     *
     * @return xml
     *
     * @throws RunTimeException
     */
    private function _process($response)
    {
        $xml = simplexml_load_string($response);
        if ($xml->result == 'failed') {
            throw new RunTimeException(sprintf(
                'Invalid result: [%s]', $xml->description
            ));
        } else {
            return $xml;
        }
    }
}