Simple PHP Page View Counter

simple-counter.php

<?php # File created on 11th February 2009 by Mike Rogers (http://www.fullondesign.co.uk/). 

## Start defining constants ## 
define(RUN_ERRORS, TRUE); // Do you want the script to display errors? TRUE = yes you do.
define(LOG_URL, '/home/user/logs/'); // Put the location of where you want to put the logs. Make sure this is absolute
$filename = rawurlencode(base64_encode($_SERVER['PHP_SELF'])); // Takes the filename then makes it network safe.
## End defining constants ##
## Parse filename ##
$filename = LOG_URL.$filename.'.log.txt';
##


// Check that the file exists, encase of the logs being removed or being invalid.
if(is_writable($filename) && is_readable($filename)){
		// We should be able to read and write it
		$file_contents = file_get_contents($filename);
		
		// Check its a number, the logs could have been hacked at some point.
		if(is_numeric($file_contents)){
			$file_contents = $file_contents + 1; // Adds 1 to the current number in the log. $file_contents++; would also work.
			
			file_put_contents($filename, $file_contents);
		}else{
			if(RUN_ERRORS === TRUE){
				echo 'File ('.$filename.') contents is not numeric';
			}
		}
} else {
	// We should create the file if we can.
	if(is_dir(LOG_URL) && is_writable(LOG_URL) && !file_exists($filename)){ // Checks that the LOG_URL is a wriable directory, and the file does not already exist.
		// lets create the file.
		file_put_contents($filename, '1');
	}else{
		if(RUN_ERRORS === TRUE){
			echo 'Cannot/write find directory/file ('.$filename.')';
		}
	}
}

/* Here is how to show how many people have view the file */
echo ('This file has been view by '.file_get_contents($filename).' please');

/*
You are free to share, modify and use this code for commerical uses. Please give a link back (to http://www.fullondesign.co.uk/ ) if you can, but you don't have you.

I claim no liability in this code, you use it at your own risk.
*/
?>