PHP判断网络连通

PHP代理其实挺麻烦的。。。

仅测试连通性

$connected = @fsockopen("blog.phpgao.com", 80);
if ($connected){
    $is_conn = true;
    @fclose($connected);
}else{
    $is_conn = false;
}
return $is_conn;

并测试可用性

//默认三秒超时

@ini_set('default_socket_timeout', 3);

$fp = @fsockopen($proxy_server, $proxy_port, $errno, $errstr, 30);

if (!$fp) {

    BizResult::ensureNotFalse(false, Constants::WEB_ERROR_SRV_UPDATE_PROXY);

} else {

    //$result['reason'] = '已通过测试，代理工作正常。';

    fclose($fp);

}

$url = 'http://blog.phpgao.com/';

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_POST, 0);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);

curl_setopt($ch, CURLOPT_PROXY, $proxy_server);

curl_setopt($ch, CURLOPT_PROXYPORT, $proxy_port);

curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxy_user . ':' . $proxy_password);

curl_setopt($ch, CURLOPT_TIMEOUT, 3);

$rtn = curl_exec($ch);

$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

// if(curl_errno($ch)){

//     echo curl_error($ch);exit();

// }

if (200 !== $httpCode) {

    BizResult::ensureNotFalse(false, Constants::WEB_ERROR_SRV_UPDATE_PROXY);

}

curl_close($ch);