PHP verification email address instance-PHP source code

In our life, or network programming, we often encounter PHP verification email address requirements. Let's take a look at the PHP verification email address code and examples. In our life, or network programming, we often encounter PHP verification email address requirements. Let's take a look at the PHP verification email address code and examples.

Script ec (2); script

Email verification may be the most common web form verification. In addition to verifying the email address, this code can also choose to check MX records in the DNS to which the email domain belongs, making email verification more powerful.

Function is_valid_email ($ email, $ test_mx = false)
{
If (eregi ("^ ([_ a-z0-9-] + )(. [_ a-z0-9-] +) * @ ([a-z0-9-] + )(. [a-z0-9-] + )*(. [a-z] {2, 4}) $ ", $ email ))
If ($ test_mx)
{
List ($ username, $ domain) = split ("@", $ email );
Return getmxrr ($ domain, $ mxrecords );
}
Else
Return true;
Else
Return false;
}