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<?php
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<?php
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//store user @IP who can join this page (still have their status.php tab open) in a file.
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// store user @IP who can join this page (still have their status.php tab open) in a file.
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$filename='/var/tmp/havp/current_users.txt';
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$filename = '/var/tmp/havp/current_users.txt';
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$change_me = 1;
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$user_ip = $_SERVER['REMOTE_ADDR'];
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//check if file exists
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if(file_exists($filename)){
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        $current_users_file = fopen($filename, "r");
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if ((!file_exists($filename)) || (filesize($filename) === 0)) {
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	$content = file($filename);
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	fclose($current_users_file);
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// if file is empty, we put user @IP in it.
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	// Creating file and write user @IP.
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        if(empty($content))
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        {
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                file_put_contents($filename, $_SERVER['REMOTE_ADDR'].PHP_EOL);
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	file_put_contents($filename, $user_ip.':TEMP'.PHP_EOL);
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        }
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        else
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        {
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} else {
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// if we found duplicate user IP, it will not be writen again
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	// If we found duplicate user IP, it will not be writen again
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                foreach($content as $line){
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                        $line = preg_replace('/\s+/', '', $line); #remove whitespace
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                        if($line == $_SERVER['REMOTE_ADDR'])
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                        {
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	$found = false;
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                                $change_me = 0;
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                        }
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	$fh = fopen($filename, 'r');
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                }
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	while (!feof($fh)) {
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// else we write user IP in the file
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		$line = fgets($fh, 1024);
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                if($change_me)
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		if (preg_match('/^'.preg_quote($user_ip).':/', $line)) {
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                {
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			$found = true;
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                        file_put_contents($filename, $_SERVER['REMOTE_ADDR'].PHP_EOL , FILE_APPEND);
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                }
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			break;
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        }
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		}
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}
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	}
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else
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	fclose($fh);
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{
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//The file doesn't exist. We create it and write user @IP.
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	// else we write user IP in the file
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	if (!$found) {
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	file_put_contents($filename, $_SERVER['REMOTE_ADDR'].PHP_EOL);
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		file_put_contents($filename, $user_ip.':TEMP'.PHP_EOL, FILE_APPEND);
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	}
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}
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}
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?>
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