检查代理ip的有效性

/**
 +-----------------------------------------------------------------------------
 * 检查代理ip信息有效性
 +-----------------------------------------------------------------------------
 * @param string $proxy_ip [117.95.100.126:8998]
 * @param int $times 执行检查次数
 * @return array
 * @author elinx  2016-07-29
 +-----------------------------------------------------------------------------
 */
function check_proxy_ip_info($proxy_ip=false, $times=10) {
    $header = array(
        // "GET / HTTP/1.1",
        // "HOST: www.baidu.com",
        "accept: application/json",
        "accept-encoding: gzip, deflate",
        "accept-language: en-US,en;q=0.8",
        "content-type: application/json",
        "user-agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36",
    );
    $url = 'http://www.baidu.com/';
    $result['succeed_times'] = 0; //成功次数
    $result['defeat_times']  = 0; //失败次数
    $result['total_spen']    = 0; //总用时
    for ($i=0; $i