Php Programming Code Examples
Php > Errors and Logging Code Examples
Intelligent 404 Handler
Intelligent 404 Handler
<?php
/*
Errors in Client
400 Bad syntax
401 Unauthorized
402 Not Used (Payment Granted)
403 Forbidden
404 Not Found
Errors in Server
500 Internal Error
501 Not Implemented
502 Overloaded
503 Gateway Timeout
*
To call the scripts add the following to your .htaccess file.
ErrorDocument 404 /track.php
*/
//choose the record either of the following statements
//depending on what your host provides
$file404 = $_SERVER['REDIRECT_ERROR_NOTES']."\n";
//or
$file404 = $_SERVER['REDIRECT_URL'] . "\n";
$filename = '/var/users/mysite/htdocs/history404.txt';
if (file_exists($filename))
{
$filecontents = file($filename);
$add = (!in_array($file404, $filecontents));
}
else $add = true;
if ($add)
{
$fp = fopen($filename, 'a');
$write = fputs($fp, $file404);
fclose($fp);
$body = '';
$reportvars = array('REDIRECT_ERROR_NOTES','HTTP_HOST', 'HTTP_REFERER', 'HTTP_USER_AGENT', 'HTTP_FROM',
'REDIRECT_URL', 'REDIRECT_REQUEST_METHOD', 'REDIRECT_STATUS','REQUEST_URI','QUERY_STRING',
'REMOTE_ADDR', 'REMOTE_PORT');
foreach($reportvars as $key) $body .= "$key: {$_SERVER[$key]}\n";
mail('[email protected]','404:' . $_SERVER['REDIRECT_URL'],$body);
}
$revbits = explode('.',strrev($_SERVER['REDIRECT_URL']));
$pages['html'] = array('html','htm','php','txt');
$pages['special'] = array('css', 'js');
$ext = strrev($revbits[0]);
if (in_array($ext, $pages['html']))
{
// or show a make a comment form
header('Location: /index.php');
}
elseif (in_array($ext, $pages['special']))
{
//output nothing
echo '';
}
else
{
//throw a large image onto the screen so it's easy to hunt down.
//change the width and height to a more discreet dimension when live
//although if the img has height and width attributes that will overrule
//the width and height here
$width = 50;
$height = 50;
$image = ImageCreate($width,$height);
$blob = ImageColorAllocate($image,27,48,107);
if (function_exists("imagegif")) {
header ("Content-type: image/gif");
imagegif ($image);
}
elseif (function_exists("imagejpeg")) {
header ("Content-type: image/jpeg");
imagejpeg ($image, "", 0.5);
}
elseif (function_exists("imagepng")) {
header ("Content-type: image/png");
imagepng ($image);
}
elseif (function_exists("imagewbmp")) {
header ("Content-type: image/vnd.wap.wbmp");
imagewbmp ($image);
}
else
// or whatever action should be taken if you don't have GD installed.
die("No image support in this PHP server");
ImageDestroy($image);
}
?>
