Subversion Repositories ALCASAR

<?php

//store in a file user @IP who can join this page.
$filename='/var/tmp/havp/current_users.txt';
//change me avoid duplicate user @IP
$change_me = 1;

//check if filename exists
if(file_exists($filename)){
        $fichier = fopen($filename, "r");
        $content = file($filename);

        //if file is empty, we put user @IP in it.
        if(empty($content))
        {
                file_put_contents($filename, $_SERVER['REMOTE_ADDR']);
        }
        else
        {
                //if we found duplicate IP, it will not write user @IP in filename (set change_me = 0)
                foreach($content as $line){
                        $line = preg_replace('/\s+/', '', $line);
                        if($line == $_SERVER['REMOTE_ADDR'])
                        {
                                $change_me = 0;
                        }

                }

                //if user @IP does not exist, we will write it in filename
                if($change_me)
                {
                        file_put_contents($filename, $_SERVER['REMOTE_ADDR'].PHP_EOL , FILE_APPEND);
                }
        }

}
else
{
        //we create filename and we put user @IP in it.
        file_put_contents($filename, $_SERVER['REMOTE_ADDR'].PHP_EOL);
}

?>