Schogini

Create a PHP CLI script called monitor.php like this

1. #!/usr/bin/php -q
2. <?php
3. define ( “ TIMEOUT “ , 30 ) ;
4. define ( “ EMAIL “ , ‘ abc @ youremail . com ‘ ) ;
5. check ( “ http://hosta.com “ ) ;
6. check ( “ http://hostb.com “ ) ;
7. check ( “ http://hostc.com “ ) ;
8. check ( “ http://hostd.com “ ) ;
9. function check ( $url ){
10. $ch = curl_init () ;
11. curl_setopt ( $ch , CURLOPT_RETURNTRANSFER , 1 ) ; // Return Page contents.
12. curl_setopt ( $ch , CURLOPT_URL , $url ) ;
13. curl_setopt ( $ch , CURLOPT_TIMEOUT , 30 ) ;
14. curl_setopt ( $ch , CURLOPT_DNS_CACHE_TIMEOUT , TIMEOUT ) ;
15. curl_setopt ( $ch , CURLOPT_CONNECTTIMEOUT , TIMEOUT ) ;
16. curl_setopt ( $ch , CURLOPT_HEADER , TIMEOUT ) ;
17. $result = curl_exec ( $ch ) ;
18. curl_close ( $ch ) ;
19. // HTTP/1.1 200 OK”)
20. if ( strpos ( $result , “ 200 OK “ ) != 8 ){
21. mail ( EMAIL , “ Error in $url “ , $results ) ;
22. }
23. }
24. ?>

Add this line in your Linux /etc/crontab or via cpanel to monitor eg: every 3 minutes

*/3 * * * * root /usr/sbin/monitor.php >> /dev/null 2>&1