On Mon, 2004-09-20 at 16:56, Marek Kilimajer wrote:
play around with popen() and stream_select()
Oooh that looks handy.
More night time reading I think!
Any further ideas to save a man with a cold from using his brain would be great!
Cheers John
Wanted to do something interesting, so here is something to get you started. It opens a pool of 10 sleep processes that sleep for a random time. Everytime a sleep process ends its sleep and exits, a new sleep process is created.
However, it contains some very, very ugly hack. stream_select() breaks index association of its parameters, so to find out what stream changed status one has to compare values of the original array ($handles) and the array passed to stream_select() ($read).
Is it how it's supposed to work or am I missing something?
<?php
$handles = array();
for($i = 0; $i < 10; $i++) {
$handles[$i] = popen('sleep ' . rand(1, 10), 'r');
echo "Opened '$handles[$i]'\n";
}while(count($handles)) {$read = $handles;
if (false === ($num_changed_streams = stream_select($read, $write = NULL, $except = NULL, 10))) { // don't forget to change tv_sec param
/* Error handling */
echo "ERROR\n";
} elseif ($num_changed_streams > 0) {
foreach($read as $key => $handle) {
echo "Closing '$handle'\n";
//echo fread($handle, 2096);
pclose($handle);
if($i < 50) {
$handles[$i] = popen('sleep ' . rand(1, 10), 'r');
echo "Opened '$handles[$i]'\n";
$i++;
}
}
// UGLY hack here
$handles = array_diff($handles, $read);
}
}?>
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