How to tell if the variable $HTTP_REFERER contains domain.com

[danieloberg]

If the variable $HTTP_REFERER contains domain.com I don't want
to echo "yeah!". In other words, if $HTTP_REFERER isn't empty
and doesn't contain domain.com I want to echo "yeah!".

Is the following a good way to code it, or could you do it better?

$pos = strpos($HTTP_REFERER, 'domain.com');

if($HTTP_REFERER!="" AND $pos == false)
{
echo "yeah!";
}

[promania]

if( $_SERVER['HTTP_REFERER']!='' && 
strpos($_SERVER['HTTP_REFERER'], 'domain.com')===false ){
 echo "yeah!"; 
}

is better than yours because with strpos
you should use '==='

but the code below would be more better

if ($_SERVER['HTTP_REFERER']!=''){
 $ar=parse_url($_SERVER['HTTP_REFERER']);
if( strpos($ar['host'], 'domain.com')===false ){
 echo "yeah!"; 
}
}