| Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 30.0 0 3002
Processing: 0 0 0.4 0 9
Waiting: 0 0 0.3 0 9
Total: 0 0 30.0 0 3003
打开keepalive：
[root@localhost ~]# ab -k -n 10000 -c 1 “http://10.69.2.206:8080/sms/ns2/save_msg.txt”
Finished 10000 requests
Concurrency Level: 1
Time taken for tests: 4.148619 seconds
Complete requests: 10000
Failed requests: 0
Write errors: 0
Keep-Alive requests: 9412
Total transferred: 2527060 bytes
HTML transferred: 160000 bytes
Requests per second: 2410.44 [#/sec] (mean)
Time per request: 0.415 [ms] (mean)
Time per request: 0.415 [ms] (mean, across all concurrent requests)
Transfer rate: 594.66 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.1 0 5
Processing: 0 0 2.1 0 203
Waiting: 0 0 2.1 0 203
Total: 0 0 2.1 0 203
四，在实际中的应用
以上实现的phttp_get和mysql memcache的 中的“保持连接”概念类似，这种技术一般来说，只适用于fastcgi模式的web服务器。
对于本机之间的http通信，在测试过程中发现phttp_get的优势有限，基本合乎逻辑。
对于本身处理时间比较长的服务，phttp_get的优势也不明显。
综上，phttp_get适用于fastcgi模式的web应用调用远程http服务，且此http服务器响应时间比较短的情况。
五，服务端需要注意的事项
1，http服务器必须支持HTTP/1.1协议
2，php应用必须返回Content-Length:的header，具体实现参见：
http://cn.php.net/manual/en/function.ob-get-length.php
需要在代码中加入：
ob_start();
$size=ob_get_length();
header(”Content-Length: $size”);
ob_end_flush();
最后附上测试代码：
<?php
//$url=http://10.69.2.206:8080/sms/ns2/save_msg.txt
function ohttp_get($host,$port,$query,&$body)
{
$fp=pfsockopen($host,$port,$errno,$errstr,1);
if(!$fp)
{
var_dump($errno,$errstr);
return -1;
}
$out = “GET ${query} HTTP/1.1\r\n”;
$out.= “Host: ${host}\r\n”;
$out.= “Connection: close\r\n”;
$out.= “\r\n”;
fwrite($fp,$out);
$line=trim(fgets($fp));
$header.=$line;
list($proto,$rcode,$result)=explode(” “,$line);
$len=-1;
while( ($line=trim(fge |
