A small example of PHP determining whether it is connected to the Internet

//Check whether the network is connected
function varify_url($url){
$check = @fopen($url,"r");
if($check){
 $status = true;
}else{
 $status = false;
}
return $status;
} //by bbs.it-home.org

Call example:

$url = "http://bbs.it-home.org";
if(varify_url($url)){
 echo "Congratulation ! Your URL < ;a href=$url>$url : is valid ";
}else{
 echo "Error ! The URL you provided: $url is invalid ";
}