Re: [PHP] Question about socket_select

2011-12-14 Thread Mihai Anghel
On Wed, Dec 14, 2011 at 1:25 AM, Matijn Woudt  wrote:
> On Wed, Dec 14, 2011 at 12:11 AM, Mihai Anghel  
> wrote:
>> Hello,
>>
>> It appears to me that something is strange with the socket_select function.
>> From what I understand the value of the fourth parameter, tv_sec,
>> should block the execution of the script for that number of seconds.
>> I tried this code :
>> >
>> error_reporting(E_ERROR);
>>
>> $serverSocket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
>>
>> $result = socket_bind($serverSocket, "127.0.0.1", "20668");
>>
>> $start = time();
>>
>> while(true)
>> {
>>    $reads = array($serverSocket);
>>    $writes = null;
>>    $except = null;
>>    $changes = socket_select($reads, $writes, $except, 5);
>>    $now = time();
>>    echo $now - $start;
>>    echo "\n";
>> }
>>
>> and when I run it with php -q server3.php the ouput shows something
>> like 0 0 0 0 0 1 1 1 1 1 2 2 2 2 etc so the script doesn't pause on
>> socket_select until it returns.
>>
>> Cam somebody explain me what's happening ?
>>
>
> It seems to me that your socket_select function is failing, maybe
> because earlier code is failing. Check the return of socket_select
> like this:
> if ($changes === false) {
>    echo "socket_select() failed, reason: " .
>        socket_strerror(socket_last_error()) . "\n";
> }
>
> Cheers,
>
> Matijn

Thanks for your suggestion, I reviewed the code and I saw that I was
missing :  socket_listen($serverSocket) . After adding this it worked
like expected

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Re: [PHP] Question about socket_select

2011-12-13 Thread Matijn Woudt
On Wed, Dec 14, 2011 at 12:11 AM, Mihai Anghel  wrote:
> Hello,
>
> It appears to me that something is strange with the socket_select function.
> From what I understand the value of the fourth parameter, tv_sec,
> should block the execution of the script for that number of seconds.
> I tried this code :
> 
> error_reporting(E_ERROR);
>
> $serverSocket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
>
> $result = socket_bind($serverSocket, "127.0.0.1", "20668");
>
> $start = time();
>
> while(true)
> {
>    $reads = array($serverSocket);
>    $writes = null;
>    $except = null;
>    $changes = socket_select($reads, $writes, $except, 5);
>    $now = time();
>    echo $now - $start;
>    echo "\n";
> }
>
> and when I run it with php -q server3.php the ouput shows something
> like 0 0 0 0 0 1 1 1 1 1 2 2 2 2 etc so the script doesn't pause on
> socket_select until it returns.
>
> Cam somebody explain me what's happening ?
>

It seems to me that your socket_select function is failing, maybe
because earlier code is failing. Check the return of socket_select
like this:
if ($changes === false) {
echo "socket_select() failed, reason: " .
socket_strerror(socket_last_error()) . "\n";
}

Cheers,

Matijn

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