<Files .htaccess>
order allow,deny
deny from all
</Files>
#If you like to use this just adjust the path for each and every Document
ErrorDocument 403 /php/servererrormessage.php
ErrorDocument 404 /php/servererrormessage.php
ErrorDocument 405 /php/servererrormessage.php
ErrorDocument 408 /php/servererrormessage.php
ErrorDocument 500 /php/servererrormessage.php
ErrorDocument 502 /php/servererrormessage.php
ErrorDocument 504 /php/servererrormessage.php