visitors.php
<?php
session_start();
function visitorsOnline()
{
$session_path=session_save_path();
$handle= opendir($session_path);
$visitors=0;
$pattern = '/^sess/';
while(($file=readdir($handle))!=FALSE)
{
if($file!="." && $file!="..")
{
if(preg_match($pattern,$file))
{$visitors++;}
}
}
return $visitors;
}
$v=visitorsOnline();
echo "there are visiters ".$v." online";
?>
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LIVE DEMO HERE
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