Creating your own logfile Page 2

The next problem I ran into was that I would get inacurate (or no) filesize specifications in the log
because it’s not possible to find out how much content that gets generated from your PHP script. I
ended up recording the original size of the PHP3 file, as this would at least give me a hint about
how much data is actually sent each day/week/month (it’s an option – use it or don’t).

Well, not much more to say except “Here’s the code, use it!” Just include this file the first
thing you do in all your PHP scripts.

<?php
/*
 * Common Logfile Format script.
 * 
 * Author: Mattias Nilsson <mattias_at_coolt.nu>
 *
 */ 
/* User definable variables */ 
$logfile =  "clf.log";    /* Filename of log to write to */ 
$timezone =  "+0100";     /* Timezone correction */ 
$lookup_size = true;     /* Set to true to enable filesize lookup */ 
$document_root =  "/usr/local/apache/share/htdocs";
/* A note about the lookup_size directive:
 * This will make this script lookup the size of the original file on disk,
 * which may or may not be the same amount of data sent to the client.
 * It does give you a hint though..
 * Oh, you have to set $document_root aswell if this should work..
 */ 
function write_to_log($str) {
    if($fd = @fopen($GLOBALS[ "logfile"],  "a")) {
    fputs($fd, $str);
    fclose($fd);
    }
}
function get_var($name,$default) {
    if($var = getenv($name)) {
    return $var;
    } else {
    return $default;
    }
}
if($remote_host = get_var( "REMOTE_HOST", false)) {
    $remote_host = get_var( "REMOTE_ADDR",  "-");
}
$remote_user = get_var( "REMOTE_USER",  "-");
$remote_ident = get_var( "REMOTE_IDENT",  "-");
$server_port = get_var( "SERVER_PORT", 80);
if($server_port!=80) {
    $server_port =  ":" . $server_port;
} else {
    $server_port =  "";
}
$server_name = get_var( "SERVER_NAME",  "-");
$request_method = get_var( "REQUEST_METHOD",  "GET");
$request_uri = get_var( "REQUEST_URI",  "");
$user_agent = get_var( "HTTP_USER_AGENT",  "");
if($lookup_size == true && $document_root) {
    $filename = ereg_replace( "?.*",  "", $request_uri);
    $filename =  "$document_root$filename";
    if(!$size = filesize($filename)) {
    $size = 0;
    }
} else {
    $size = 0;
}
$date = gmdate( "d/M/Y:H:i:s");
$log = "$remote_host $remote_ident $remote_user [$date $timezone] "".
    "$request_method http://$server_name$server_port$request_uri" 200 $sizen";
write_to_log($log);
?>

–Mattias