if(!preg_match("/[a-zA-ZÄÖÜäöü0-9_\-\.]{2,255}[\@]{1}[a-zA-ZÄÖÜäöü0-9_\-\.]{3,255}[\.][a-zA-Z]{2,4}/",$email)) 
{ 
   // 
} 

if(!preg_match("/^http:\/\//",$homepage) && !preg_match("/^http:\/\//",$homepage) && !preg_match("/^www/",$homepage) && !preg_match("/[a-zA-ZÄÖÜäöü0-9_\-\.]{3,255}[\.][a-zA-Z]{2,4}/",$homepage)) 
{ 
   // 
}