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<?
# 404.php, 8/10/2000.
# Traps 404 errors and mails a notice to the webmaster.
# Requires PHP 3.0 or newer, and mail capability on your system.
#
# Copyright 2000 shaun@shat.net under the GNU Public License.
# Disclaimer: I wrote this script for me, and it works for me.
# If it doesn't work for you, or makes your server explode,
# that's life. Please email with questions or bug reports.
# Set these variables to configure the script:
# Set $domain to your domain name (no www)
$domain = "your.domain.com";
# Set $docroot to the URL of the directory which contains your
# .htaccess file. Don't include trailing slash.
$docroot = "http://your.domain.com";
# Font face you'd like to use on the 404 page
$fontface = "Verdana";
# Font size you'd like to use on the 404 page
$fontsize = "2";
# Background color of the 404 page (default is white)
$bgcolor = "#ffffff";
# Text color you'd like to use on the 404 page (default is black)
$textcolor = "#000000";
# This script is capable of mailing the details of each 404 error
# to the webmaster. Use the $reportlevel variable to control when
# you receive these reports.
#
# 0 = don't use the email capabilities at all
# 1 = send email only if the error's referer contains your domain name
# (i.e. the 404 was generated by a broken link on your site)
# 2 = send email any time a 404 error is generated (useful for tracking
# broken links at other sites which link to you)
$reportlevel = 2;
# Set $emailaddress to the email address of whoever should be
# notified of 404 errors. Don't escape the @ symbol. This will also
# be used as the "from" address on any emails the script generates.
# You can leave this unassigned if you're not using email features.
$emailaddress = "you@your.domain.com";
################################################################
# DON'T EDIT BELOW THIS LINE UNLESS YOU KNOW WHAT YOU'RE DOING #
################################################################
# If you want to edit the script, I've commented profusely :) #
################################################################
# The print_details function is what prints the 404 error to
# the visitor. As far as I know, PHP3 doesn't incorporate Perl's
# print <<"EOT" ability. PHP4 does allow this capability
# but the script was written for PHP3. So, you have to use
# a lot of echo statements if you want to retain PHP3 compat.
function print_details()
{
# Request access to the global variables we need
global $fontface, $fontsize, $docroot, $REQUEST_URI, $reportlevel;
global $bgcolor, $textcolor
# Print the 404 error in web format
echo "<html><head><title>404 Not Found</title></head>";
echo "<body bgcolor=\"$bgcolor\" text=\"$textcolor\">";
echo "<b><h1>404 Not Found</h1></b>";
echo "<p><font face=\"$fontface\" size=\"$fontsize\">";
echo "We're sorry. The page you requested, $docroot$REQUEST_URI, doesn't exist";
echo " on this server.</font></p>";
# If an email report is being generated, let the visitor know:
if ($reportlevel != 0)
{
echo "<p><font face=\"$fontface\" size=\"$fontsize\">";
echo "The details of this error have automatically been mailed to the webmaster.";
}
# Close up the HTML tags
# echo "</body></html>";
return;
}
# The send_email function sends the details of the 404 error to the
# webmaster.
function send_email()
{
# Request access to the global variables we need
global $REQUEST_URI, $HTTP_REFERER, $emailaddress, $REMOTE_ADDR, $docroot;
# Build the $errortime variable to contain the date/time of the error.
# Using date() likely would have been better, but I already had this code
# elsewhere, and I'm lazy.
$today = getdate();
$month = $today[mon];
$mday = $today[mday];
$year = $today[year];
$hours = $today[hours];
$minutes = $today[minutes];
$errortime = "$month/$mday/$year at $hours:$minutes";
# Create the body of the email message
$message .= "404 Error Report\n\nA 404 error was encountered by $REMOTE_ADDR";
$message .= " on $errortime.\n\n";
$message .= "The URI which generated the error is: \n$docroot$REQUEST_URI\n\n";
$message .= "The referring page was:\n$HTTP_REFERER\n\n";
# Send the mail message. This assumes mail() will work on your system!
mail("$emailaddress", "404 Error Report", $message, "From: $emailaddress");
return;
}
# Done with function declarations. Main function begins here.
# Send a 404 error to the user's browser
print_details();
# See whether or not we should send an email report. If so, do it.
if ($reportlevel != 0)
if ($reportlevel == 1) {
if (eregi($domain,$HTTP_REFERER))
send_email(); }
else
send_email();
# All done!
exit;
?>
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