simple and clean code to check if a string is an e-mail address

[searain]

i know there are quit a few sample codes out there. could anyone give me the link or the sample codes of your favorite? simple and clean to check if a string is a e-mail address?

does php have a built in function for this purpose now?

thanks

[DigitalExpl0it]

here is a function I use all the time

 function is_email_valid($email) { 
  if(eregi("^[a-z0-9\._-]+@+[a-z0-9\._-]+\.+[a-z]{2,3}$", $email)) return TRUE; 
  else return FALSE; 
}

if (is_email_valid($email)) {
//your cod ehere
...
} else {
echo "Sorry email is not valid";
}

[chadfiles]

try this:

ereg("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*$", $email);

[rrijnders]

12 seconds flat browsing the code library on this site...