Deep analysis of the difference between Fsockopen and Pfsockopen

According to the manual, the only difference between the two functions is that thePfsockopen is a continuous connection, while the Fsockopen is not.
I wrote a code for a moment:

Copy Code code as follows:


<?php


$data = "1,0,721,73,1,0,0,43290000,0,60D81D509BC00451,3,FFFFFFFF";


//http://10.144.99.114/sanex_new/modules/subscribemanager/test.php


$host = ' 127.0.0.1 ';


$url = "/aa.php";


$pffirst = false;


$times = 1000;


$startTime = Microtime (true);


for ($index = 0; $index < $times; $index + +) {


Echo HttpPost ($host, $url, $data, $pffirst). " <hr><br/> ";


}


$middleTime = Microtime (true);


for ($index = 0; $index < $times; $index + +) {


Echo HttpPost ($host, $url, $data,! $pffirst). " <hr><br/> ";;


}


$endTime = Microtime (true);


Echo ($pffirst?) Pfsocket ":" Fsocket ").": ". ($middleTime-$startTime);


echo "<br/>";


Echo ($pffirst?) Fsocket ":" Pfsocket ").": ". ($endTime-$middleTime);





$count = 0;


//Contract function


function HttpPost ($host, $url, $data, $p)


{


Global $count;


$func = $p? " Pfsockopen ":" Fsockopen ";





$conn = $func ($host, $errno, $errstr, 30);


if (! $conn)


 {


echo "$errstr ($errno) <br/>n";


return;


 }





$header = "POST". $url. " Http/1.1rn ";


$header. = "Host: {$host}rn";


$header. = "CONTENT-TYPE:APPLICATION/X-WWW-FORM-URLENCODEDRN";


$header. = "Content-length:". strlen ($data). " RN ";


$header. = "Connection:keep-alivernrn";


$header. = "{$data}rnrn";





fwrite ($conn, $header);





$count + +;


echo $count. ' '. $header. " <br/><br/> ";





$resp = ';


//while (!feof ($conn)) {


//$resp. = Fgets ($conn);


 //}


//fclose ($conn);


return $RESP;


}


?>

The results showed that :
The second line of code, if the//fclose ($conn), comments out, the result is:
fsocket:11.04693198204
pfsocket:0.34867787361145

If you do not comment:
fsocket:12.509312152863
pfsocket:11.120275974274
Can be seen, fsocketopen default each processing end, even if the protocol head is keep-alive, the connection is still broken off.
and Pfsocketopen under keep-alive conditions, the connection can be reused for the next time.
Pfsocketopen is recommended when sending large amounts of data on a single connection