<?PHP
$site="http://weather.yahooapis.com/forecastrss?p=GRXX0033&u=f";
$ch=curl_init($site);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
$data=curl_exec($ch);
curl_close($ch);

preg_match('|<description>(.*?)</description>|si',$data,$f);
preg_match('|<pubDate>(.*?)</pubDate>|si',$data,$ff);
preg_match('|<description><!\[CDATA\[(.*?)]]></description>|si',$data,$fff);

echo $b=$f[1]."<br>";
echo $a=$ff[1];
echo $c=nl2br($fff[1]);
?>