2009/4/28 Luke <l...@blog-thing.com>: > > > 2009/4/28 Jan G.B. <ro0ot.w...@googlemail.com> >> >> 2009/4/28 Jay Blanchard <jblanch...@pocket.com>: >> > Our company wants to do e-mail verification and does not want to use the >> > requests / response method (clicking a link in the e-mail to verify the >> > address), which as we all know is the only way you can be truly sure. I >> > found this; >> > >> > http://verify-email.org/ >> > >> > Which seems to be the next best deal and it is written in PHP. Has >> > anyone used this? Is anyone doing something similar? How do you handle >> > errors? I know that some domains will not accept these requests. >> > >> >> They don't even detect greylisting! >> >> >> >> > I think that this method would really work for us and cut down on the >> > bogus e-mail addresses we're receiving though. Thoughts? >> > >> >> There's just one way: let the users confirm with an activation link. >> People often insert their addresses wrong without noticing it.. >> example: www.myal...@mydomain.org instead of myal...@mydomain.org, >> aol.<DE|UK|NL|FR|etc> instead of aol.com and so on. >> >> So ... nothing like "insert your mail twice" or "re-check your address >> please" actually works. ;) >> >> On the other hand: Douple-opt-In is quite like an industry standard - >> why wouldn't your firm use it? It makes customers happy as well as >> "not-customers" because people can't use their addressess to sign-up. >> I hate getting other peoples email. >> >> >> byebye >> >> -- >> PHP General Mailing List (http://www.php.net/) >> To unsubscribe, visit: http://www.php.net/unsub.php >> > > /** > Validate an email address. > Provide email address (raw input) > Returns true if the email address has the email > address format and the domain exists. > > Modified: 06/06/2003 > **/ > function validEmail($email) > { > $isValid = true; > $atIndex = strrpos($email, "@"); > if (is_bool($atIndex) && !$atIndex) > { > $isValid = false; > } > else > { > $domain = substr($email, $atIndex+1); > $local = substr($email, 0, $atIndex); > $localLen = strlen($local); > $domainLen = strlen($domain); > if ($localLen < 1 || $localLen > 64) > { > // local part length exceeded > $isValid = false; > } > else if ($domainLen < 1 || $domainLen > 255) > { > // domain part length exceeded > $isValid = false; > } > else if ($local[0] == '.' || $local[$localLen-1] == '.') > { > // local part starts or ends with '.' > $isValid = false; > } > else if (preg_match('/\\.\\./', $local)) > { > // local part has two consecutive dots > $isValid = false; > } > else if (!preg_match('/^[A-Za-z0-9\\-\\.]+$/', $domain)) > { > // character not valid in domain part > $isValid = false; > } > else if (preg_match('/\\.\\./', $domain)) > { > // domain part has two consecutive dots > $isValid = false; > } > else if > (!preg_match('/^(\\\\.|[A-Za-z0-9!#%&`_=\\/$\'*+?^{}|~.-])+$/', > str_replace("\\\\","",$local))) > { > // character not valid in local part unless > // local part is quoted > if (!preg_match('/^"(\\\\"|[^"])+"$/', > str_replace("\\\\","",$local))) > { > $isValid = false; > } > } > > if ($isValid && !(checkdnsrr($domain,"MX") || > checkdnsrr($domain,"A"))) > { > // domain not found in DNS > $isValid = false; > } > } > > return $isValid; > } > > > -- > Luke Slater
I Like the approach of checking the DNS. But all that regexp matching could be skipped when using filter_input() or filter_var() with the Filter FILTER_VALIDATE_EMAIL - or am I wrong? I'm using the filter in combination with a domain checker which basically checks for a valid TLD on a high traffic website with great success - so far. byebye -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
