Here is a PHP E-mail Verification function I have created.

PHP Code:

function valid_email($email){
if(eregi("^[a-z1-9._-]{1,63}@[a-z1-9-]{2,63}\.{1}[a-z1-9]{2,4}(\.[a-z1-9]{2,4})*$", $email)) {
return true;
} else {
return false;
}
} 


Usage:

PHP Code:

// $email = "rich@whatever.com";   VALID
// $email = "galaxian_dude@whatever.com"; VALID
// $email = "galaxian-rich@what-ever.com"; VALID
// $email = "galaxian@what_ever.com"; INVALID
// $email = "galaxian@dude@whatever.com"; INVALID
// $email = "rich123@whatever.co.uk"; VALID
// $email = "rich-123@whatever.com.tw"; VALID
// $email = "rich@asdasd.commmm"; INVALID

if(valid_email($email)) {
 print "Valid!";
} else {
print "Invalid!";
} 


Feel free to use. This is my first real practice session with regular expressions. If you have any better examples, please post.

Very nice, simple and elegant.

Jamie

Or perhaps the preg version which is [apparently] faster.

PHP Code:

function valid_email($email){
if(preg_match("/^[a-z1-9._-]{1,63}@[a-z1-9-]{2,63}\.{1}[a-z1-9]{2,4}(\.[a-z1-9]{2,4})*$/", $email)) {
return true;
} else {
return false;
}
} 


Don't think it'll make a significant difference, the speed that is. If the first once works perfectly, use it!