check_website PHP script

Project Notes

PHP check-script which can check a website(URL) and react if errors like 404, 500 etc are returned.

#!/usr/local/bin/php
<?php

/*
** This script will check a response code from an URL
** Made by Soeren,IT 07-07-2010
*/

if(!isset($argv[1])) { echo "Usage: ./check_www <url (without http://)> "; exit(2); }

$url = "http://" . $argv[1];
$header = @get_headers($url, 1);

if(!$header) { echo "Could not connect to $url"; exit(2); }

if(preg_match('/200/', $header[0]))
{
print_r($header[0]);
exit(0);
}
elseif(preg_match('/302/', $header[0]))
{
print_r($header[0]);
exit(0);
}
elseif(preg_match('/301/', $header[0]))
{
print_r($header[0]);
exit(0);
}
else
{
print_r($header[0]);
exit(2);
}
?>

Remember to change /usr/local/bin/php to whereever your php-binary is located and chmod +x check_www.

commands.cfg:

define command{
command_name check_www
command_line /usr/local/libexec/nagios/check_www $ARG1$
}

services.cfg:

define service{
use default-critical
host_name webserver
contact_groups it-department
service_description Website: www.example.org
check_command check_www!www.example.org
}