Re: Checking for a Valid Email String.

> On Wed, 12 Mar 2003, Philip J. Newman wrote: > > > Required: Help for checking for a valid email string. On Tue, Mar 11, 2003 at 08:19:36PM -0500, David E.S.V. wrote: > > you mean something like this? > > //checking if the email is valid > > if (eregi("^[0-9a-z]([-_.]?[0-9a-z])*@[0-9a-z]([-.]?[0-9a-z])*\\.[a-z]{2,3}$", > $email, $check)) > { > if ( !getmxrr(substr(strstr($check[0], '@'), 1), $validate_email_temp) ) > $mensaje="server not valid"; > > // checking DNS > if(!checkdnsrr(substr(strstr($check[0], '@'), 1),"ANY")) > $mensaje="server not valid"; > > } Don't forget plus signs. When providing email addresses to lists and web sites, I regularly tag my address (as the From address on this message demonstrates). Using procmail for local delivery allows these addresses to be delivered to my account, and I can more easily track down the origin of "tagged" spam. When I come across a web site or list that doesn't allow my address with a plus sign, I find another site or list. So I use: function isvalidemail($what) { if (!eregi('[a-z0-9][a-z0-9._=+-]*@([a-z0-9][a-z0-9-]*\.)+[a-z][a-z]+$',$what)) return(false); list($user,$domain) = explode("@",$what); if (!getmxrr($domain,$mxhosts)) return(false); if (!count($mxhosts) > 0) return(false); return(true); } -- Paul Chvostek <paul@it.ca> Operations / Abuse / Whatever it.canada, hosting and development http://www.it.ca/