How many visitors online PHP script

This is a simple script to display in your page the number of visitors you have online. It uses a .txt file to write and store the visitors for a time period before updating itself. It uses nothing more than that .txt file so there''s no need for coding knowledge, mysql databases whatsoever. Just use the following line in your scripts and CHMOD your visitors.txt file to 777 so we can read and write it. The script (assuming that we've named the tct file "vixitors.txt"):

<?php
$dataFile = "visitors.txt";

$sessionTime = 30; //this is the time in **minutes** to consider someone online before removing them from our file

//Please do not edit bellow this line

error_reporting(E_ERROR | E_PARSE);

if(!file_exists($dataFile)) {
	$fp = fopen($dataFile, "w+");
	fclose($fp);
}

$ip = $_SERVER['REMOTE_ADDR'];
$users = array();
$onusers = array();

//getting
$fp = fopen($dataFile, "r");
flock($fp, LOCK_SH);
while(!feof($fp)) {
	$users[] = rtrim(fgets($fp, 32));
}
flock($fp, LOCK_UN);
fclose($fp);


//cleaning
$x = 0;
$alreadyIn = FALSE;
foreach($users as $key => $data) {
	list( , $lastvisit) = explode("|", $data);
	if(time() - $lastvisit >= $sessionTime * 60) {
		$users[$x] = "";
	} else {
		if(strpos($data, $ip) !== FALSE) {
			$alreadyIn = TRUE;
			$users[$x] = "$ip|" . time(); //updating
		}
	}
	$x++;
}

if($alreadyIn == FALSE) {
	$users[] = "$ip|" . time();
}

//writing
$fp = fopen($dataFile, "w+");
flock($fp, LOCK_EX);
$i = 0;
foreach($users as $single) {
	if($single != "") {
		fwrite($fp, $single . "\r\n");
		$i++;
	}
}
flock($fp, LOCK_UN);
fclose($fp);

if($uo_keepquiet != TRUE) {
	echo '<div style="padding:5px; margin:auto; background-color:#fff"><b>' . $i . ' visitors online</b></div>';
}

?>

Usage:

<?php
include('index.php'); 
//here we call the script                                     
//you can change the name of                                     
//your folder to whatever you                                      
//like but don't forget to change                                      
//it name here also.
?>

Don't forget to comment if you have any issues or problems with the script. If you find it useful and want to thank us you can always put a link back or drup us a line here. Download this script

For coding help and further support please use the forum.