Just in case you want to know if the url really exists:
function url_exist($url){//se passar a URL existe
$c=curl_init();
curl_setopt($c,CURLOPT_URL,$url);
curl_setopt($c,CURLOPT_HEADER,1);//get the header
curl_setopt($c,CURLOPT_NOBODY,1);//and *only* get the header
curl_setopt($c,CURLOPT_RETURNTRANSFER,1);//get the response as a string from curl_exec(), rather than echoing it
curl_setopt($c,CURLOPT_FRESH_CONNECT,1);//don't use a cached version of the url
if(!curl_exec($c)){
//echo $url.' inexists';
return false;
}else{
//echo $url.' exists';
return true;
}
//$httpcode=curl_getinfo($c,CURLINFO_HTTP_CODE);
//return ($httpcode<400);
}