<?php



/**

 * Curl 封装

 */

class Curl {



    /**

     * 

     * @param type $method 请求方式

     * @param type $url 地址

     * @param type $fields 附带参数，可以是数组，也可以是字符串

     * @param type $userAgent 浏览器UA

     * @param type $httpHeaders header头部，数组形式

     * @param type $username 用户名

     * @param type $password 密码

     * @return boolean

     */

    public  function execute($method, $url, $fields = '', $userAgent = '', $httpHeaders = '', $username = '', $password = '') {

        $ch = $this->create();

        if (false === $ch) {

            return false;

        }

        if (is_string($url) && strlen($url)) {

            $ret = curl_setopt($ch, CURLOPT_URL, $url);

        } else {

            return false;

        }

        //是否显示头部信息

        curl_setopt($ch, CURLOPT_HEADER, false);

        //

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

        if ($username != '') {

            curl_setopt($ch, CURLOPT_USERPWD, $username . ':' . $password);

        }

        

        if (stripos($url, "https://") !== FALSE) {

            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);

        }

        

        $method = strtolower($method);

        if ('post' == $method) {

            curl_setopt($ch, CURLOPT_POST, true);

            if (is_array($fields)) {

                $sets = array();

                foreach ($fields AS $key => $val) {

                    $sets[] = $key . '=' . urlencode($val);

                }

                $fields = implode('&', $sets);

            }

            curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);

        } else if ('put' == $method) {

            curl_setopt($ch, CURLOPT_PUT, true);

        }

        //curl_setopt($ch, CURLOPT_PROGRESS, true);

        //curl_setopt($ch, CURLOPT_VERBOSE, true);

        //curl_setopt($ch, CURLOPT_MUTE, false);

        curl_setopt($ch, CURLOPT_TIMEOUT, 10); //设置curl超时秒数

        if (strlen($userAgent)) {

            curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);

        }

        if (is_array($httpHeaders)) {

            curl_setopt($ch, CURLOPT_HTTPHEADER, $httpHeaders);

        }

        $ret = curl_exec($ch);

        if (curl_errno($ch)) {

            curl_close($ch);

            return array(curl_error($ch), curl_errno($ch));

        } else {

            curl_close($ch);

            if (!is_string($ret) || !strlen($ret)) {

                return false;

            }

            return $ret;

        }

    }



    /**

     * 发送POST请求

     * @param type $url 地址

     * @param type $fields 附带参数，可以是数组，也可以是字符串

     * @param type $userAgent 浏览器UA

     * @param type $httpHeaders header头部，数组形式

     * @param type $username 用户名

     * @param type $password 密码

     * @return boolean

     */

    public function post($url, $fields, $userAgent = '', $httpHeaders = '', $username = '', $password = '') {

        $ret = $this->execute('POST', $url, $fields, $userAgent, $httpHeaders, $username, $password);

        if (false === $ret) {

            return false;

        }

        if (is_array($ret)) {

            return false;

        }

        return $ret;

    }



    /**

     * GET

     * @param type $url 地址

     * @param type $userAgent 浏览器UA

     * @param type $httpHeaders header头部，数组形式

     * @param type $username 用户名

     * @param type $password 密码

     * @return boolean

     */

    public function get($url, $userAgent = '', $httpHeaders = '', $username = '', $password = '') {

        $ret = $this->execute('GET', $url, "", $userAgent, $httpHeaders, $username, $password);

        if (false === $ret) {

            return false;

        }

        if (is_array($ret)) {

            return false;

        }

        return $ret;

    }



    /**

     * curl支持 检测

     * @return boolean

     */

    public function create() {

        $ch = null;

        if (!function_exists('curl_init')) {

            return false;

        }

        $ch = curl_init();

        if (!is_resource($ch)) {

            return false;

        }

        return $ch;

    }



}



