fsockopen

[michellylei]

<?php

$fp = fsockopen("www.example.com", 80, $errno, $errstr, 30);

if (!$fp) {

    echo "$errstr ($errno)<br />\n";

} else {

    $out = "GET / HTTP/1.1\r\n";

    $out .= "Host: www.example.com\r\n";

    $out .= "Connection: Close\r\n\r\n";

    fwrite($fp, $out);

    while (!feof($fp)) {

        echo fgets($fp, 128);

    }

    fclose($fp);

}

?> 

 

1, when fwrite called, how many msg reply from www.example.com?  why use loop to read?

2, can i call fwrite twice first, then call fget twice to get feedback?

[niwa3836]

Not sure I understand the question, but will try and answer as best...

 

1, when fwrite called, how many msg reply from www.example.com?  why use loop to read?

Answer> it will continue to read until that buffer is clear

 

2, can i call fwrite twice first, then call fget twice to get feedback?

Answer> You are calling fgets lots until the buffer is cleared.

 

You are entering a little bit of an interesting area here, I set the streams to non blocking and then have a watchdog timer that quits if no data arrived in a while, therefore even if the buffer is initiallly cleared I can still wait, just in case the app sends a little bit more.

 

stream_set_blocking($conn,0) ;

if($starttime + 20 < date('U')) break ;

if(!feof($conn))

{

$result = fgets($conn) ;

 

Thats a little snippett, which might give you an idea (the break leaves a while loop)

[michellylei]

thanks so much.

so if i do this way:

 

fwrite($fp, $out);

fwrite($fp, $out1);

fwrite($fp, $out2);

 

while (!feof($fp)) {

        echo fgets($fp, 128);

    }

so fgets will read all infomation which reply to 3 fwrite call, right? but u can not know which data are reply to which fwrite call,right?