[转]CURL 非阻塞调用类

<?php
/*****************************************************
 * CURL 非阻塞调用类
 * Auther: Linvo
 * Copyright(C) 2010/10/21
 *******************************************************/
/*
    // 使用范例
    // 传入参数说明
    // url 请求地址
    // data POST方式数据
    //并发调用
    $param1 = array(
        array(
            'url' => "http://localhost/a.php?s=1",
        ),
        array(
            'url' => "http://localhost/a.php?s=1",
            'data' => array('aaa' => 1, 'bbb' => 2),
        ),
    );

    //单个调用
    $param2 = array(
        'url' => "http://localhost/a.php?s=0",
        'data' => array('aaa' => 1, 'bbb' => 2),
    );

    //单个调用（GET简便方式）
    $param3 = 'http://localhost/a.php?s=2';
    $ac = new AsyncCURL();
    $ac->set_param($param1);
    $ret = $ac->send();
    //返回值为请求参数顺序的结果数组（元素值为FALSE表示请求错误）
    var_dump($ret);
*/

class AsyncCURL
{
    /**
     * 是否需要返回HTTP头信息
     */
    public $curlopt_header = 0;
    /**
     * 单个CURL调用超时限制
     */
    public  $curlopt_timeout = 20;
    private $param           = array();

    /**
     * 构造函数（可直接传入请求参数）
     *
     * @param array 可选
     * @return void
     */
    public function __construct($param = FALSE)
    {
        if ($param !== FALSE)
        {
            $this->param = $this->init_param($param);
        }
    }

    /**
     * 设置请求参数
     *
     * @param array
     * @return void
     */
    public function set_param($param)
    {
        $this->param = $this->init_param($param);
    }

    /**
     * 发送请求
     *
     * @return array
     */
    public function send()
    {
        if (!is_array($this->param) || !count($this->param))
        {
            return FALSE;
        }
        $curl   = $ret = array();
        $handle = curl_multi_init();
        foreach ($this->param as $k => $v)
        {
            $param = $this->check_param($v);
            if (!$param)
            {
                $curl[$k] = FALSE;
            }
            else
            {
                $curl[$k] = $this->add_handle($handle, $param);
            }
        }
        $this->exec_handle($handle);
        foreach ($this->param as $k => $v)
        {
            if ($curl[$k])
            {
                $ret[$k] = curl_multi_getcontent($curl[$k]);
                curl_multi_remove_handle($handle, $curl[$k]);
            }
            else
            {
                $ret[$k] = FALSE;
            }
        }
        curl_multi_close($handle);
        return $ret;
    }

    //以下为私有方法
    private function init_param($param)
    {
        $ret = FALSE;
        if (isset($param['url']))
        {
            $ret = array($param);
        }
        else
        {
            $ret = isset($param[0]) ? $param : FALSE;
        }
        return $ret;
    }

    private function check_param($param = array())
    {
        $ret = array();
        if (is_string($param))
        {
            $url = $param;
        }
        else
        {
            extract($param);
        }
        if (isset($url))
        {
            $url = trim($url);
            $url = stripos($url, 'http://') === 0 ? $url : NULL;
        }
        if (isset($data) && is_array($data) && !empty($data))
        {
            $method = 'POST';
        }
        else
        {
            $method = 'GET';
            unset($data);
        }
        if (isset($url))
        {
            $ret['url'] = $url;
        }
        if (isset($method))
        {
            $ret['method'] = $method;
        }
        if (isset($data))
        {
            $ret['data'] = $data;
        }
        $ret = isset($url) ? $ret : FALSE;
        return $ret;
    }

    private function add_handle($handle, $param)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $param['url']);
        curl_setopt($curl, CURLOPT_HEADER, $this->curlopt_header);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_TIMEOUT, $this->curlopt_timeout);
        if ($param['method'] == 'POST')
        {
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $param['data']);
        }
        curl_multi_add_handle($handle, $curl);
        return $curl;
    }

    private function exec_handle($handle)
    {
        $flag = null;
        do
        {
            curl_multi_exec($handle, $flag);
        } while ($flag > 0);
    }
}

源码转自互联网