Mod_Rewrite Test

<?PHP

$message = "test failed"; 
$moduleName = 'mod_rewrite';

if(function_exists('apache_get_modules') && in_array($moduleName, apache_get_modules())) {
  $message = "apache_get_modules is true";
} elseif(isset($_SERVER['HTTP_MOD_REWRITE']) && $_SERVER['HTTP_MOD_REWRITE'] == 'On') {
  $message = "isset is true";
} else {
  $message = "all return false";
}

echo $message;

SS 2.4

### SILVERSTRIPE START ###
<Files *.ss>
  Order deny,allow
	Deny from all
	Allow from 127.0.0.1
</Files>

<Files web.config>
	Order deny,allow
	Deny from all
</Files>

ErrorDocument 404 /assets/error-404.html
ErrorDocument 500 /assets/error-500.html

<IfModule mod_alias.c>
	RedirectMatch 403 /silverstripe-cache(/|$)
</IfModule>

<IfModule mod_rewrite.c>
#	SetEnv HTTP_MOD_REWRITE On
	RewriteEngine On
	RewriteBase '/'

	RewriteCond %{REQUEST_URI} ^(.*)$
	RewriteCond %{REQUEST_FILENAME} !-f
	RewriteRule .* sapphire/main.php?url=%1&%{QUERY_STRING} [L]
</IfModule>
### SILVERSTRIPE END ###

SS 3.0.5

### SILVERSTRIPE START ###
<Files *.ss>
  Order deny,allow
	Deny from all
	Allow from 127.0.0.1
</Files>

<Files web.config>
	Order deny,allow
	Deny from all
</Files>

# This denies access to all yml files, since developers might include sensitive
# information in them. See the docs for work-arounds to serve some yaml files
<Files *.yml>
	Order allow,deny
	Deny from all
</Files>

ErrorDocument 404 /assets/error-404.html
ErrorDocument 500 /assets/error-500.html

<IfModule mod_alias.c>
	RedirectMatch 403 /silverstripe-cache(/|$)
	RedirectMatch 403 /vendor(/|$)
	RedirectMatch 403 /composer\.(json|lock)
</IfModule>

<IfModule mod_rewrite.c>
#	SetEnv HTTP_MOD_REWRITE On
	RewriteEngine On
	RewriteBase '/'

	RewriteCond %{REQUEST_URI} ^(.*)$
	RewriteCond %{REQUEST_FILENAME} !-f
	RewriteCond %{REQUEST_URI} !\.php$
	RewriteRule .* framework/main.php?url=%1&%{QUERY_STRING} [L]
</IfModule>
### SILVERSTRIPE END ###

Error code from v2.4 site :
[Tue Oct 01 16:12:47.038457 2013] [core:alert] [pid 520917] [client 75.108.179.22:53240] /home/lewisweb/public_html/.htaccess: Invalid command 'SetEnv', perhaps misspelled or defined by a module not included in the server configuration,