Validate Email

<?php

function smcf_validate_email($email) {

$at = strrpos($email, "@");

// Make sure the at (@) sybmol exists and

// it is not the first or last character

if ($at && ($at < 1 || ($at + 1) == strlen($email)))

return false;

// Make sure there aren't multiple periods together

if (preg_match("/(\.{2,})/", $email))

return false;

// Break up the local and domain portions

$local = substr($email, 0, $at);

$domain = substr($email, $at + 1);

// echo $local.'<br>';

// echo $domain.'<br>';

// Check lengths

$locLen = strlen($local);

$domLen = strlen($domain);

if ($locLen < 1 || $locLen > 64 || $domLen < 4 || $domLen > 255)

return false;

// Make sure local and domain don't start with or end with a period

if (preg_match("/(^\.|\.$)/", $local) || preg_match("/(^\.|\.$)/", $domain))

return false;

// Check for quoted-string addresses

// Since almost anything is allowed in a quoted-string address,

// we're just going to let them go through

if (!preg_match('/^"(.+)"$/', $local)) {

// It's a dot-string address...check for valid characters

if (!preg_match('/^[-a-zA-Z0-9!#$%*\/?|^{}`~&\'+=_\.]*$/', $local))

return false;

}

// Make sure domain contains only valid characters and at least one period

if (!preg_match("/^[-a-zA-Z0-9\.]*$/", $domain) || !strpos($domain, "."))

return false;

// Check if the length of last part is atleast 2

$last_part = explode(".", $domain);

// echo strlen($last_part[1]);

if(strlen($last_part[1]) <= 1)

return false;

return true;

}

$email = 'dskanth@gmail.com';

if (!smcf_validate_email($email))

echo 'Invalid email';

else

echo 'valid email';

?>