Probably the most efficient place to do this sort of field
checking would be using javascript in the browser. That
would stop the bad addresses even being sent down the line
to the server in the first place.
Keith
In theory, theory and practice are the same;
in practice they are not.
On Sat, 20 May 2006, fbsd wrote:
> To: Yesmin Patwary <[EMAIL PROTECTED]>, mysql@lists.mysql.com
> From: fbsd <[EMAIL PROTECTED]>
> Subject: RE: Find invalid email formats using MySQL query.
>
> You need to use a stronger edit to check email addresses.
> This is what I use. Note the dns mx domain name check.
>
> $len = "0,45";
> if (empty ($email))
> { $errors[] = "<font color=red>You didn't enter a Email
> Address.</font>"; }
> elseif (!ereg("^([[:alnum:]\.\_\-]+)([EMAIL PROTECTED]:alnum:]\.\-]+\.+)",
> $email))
> { $errors[] = "<font color=red>Email Address format is
> invalid. It must be
> this format [EMAIL PROTECTED]</font>";
> $errors[] = "<font color=red>Alpha-Numeric characters
> plus - and . and _
> and @ are valid in the address.</font>"; }
> else
> { // good email address so far now check for good dns mx for
> domain name
> list($Username, $Domain) = split("@",$email);
> if(!getmxrr($Domain, $MXHost))
> { $errors[] = "<font color=red>Email Address Domain
> name is invalid because
> it has no DNS mx records.</font>";}
>
>
> As far as I know there is no way to do this in a query command. You
> have to read every row's email field and then process against the
> php code to check/validate followed by a DB delete for all bad ones.
>
> Far better to fix code that edits the email field before adding it
> to db.
> Denying bad field content before adding it is the normal way this is
> done.
>
> -----Original Message-----
> From: Yesmin Patwary [mailto:[EMAIL PROTECTED]
> Sent: Saturday, May 20, 2006 10:48 AM
> To: mysql@lists.mysql.com
> Subject: Find invalid email formats using MySQL query.
>
>
> Dear All,
>
> My contact table has email field which contains many invalid email
> addresses. I find them using following php function. Is there a way
> to do that check in MySQL query?
>
> function emailValidate ($str)
> {
> $reg = "^([a-zA-Z0-9._-]+)@([a-zA-Z0-9-])+(\.[a-zA-Z0-9-]+)+$";
> if (eregi($reg, $str)) {
> return true;//-- good email
> }else{
> return false;//--bad email
> }
> }//--close function
>
> Thanks in advance for any comments or help.
>
>
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