Email Syntax Verification

ThinkGeekness

Hi, what is the php code to check to make sure in a form that the email entered has the correct syntax?

Thanks

dalecosp

There are several ways, generally involving regular expressions (POSIX std.) or PCRE's (PERL-Compatible regular expressions.) Here's a function I used some time ago, [man]using ereg/man (POSIX). Feed it the variable and a string that represents the data type, English names, email addy, or US phone number...

function ValidateInput($var, $type) {

    trim($var);
    if ($type=="name") { $Pattern = "^[A-Z][c]?[A-Z]?[a-z]+[a-z]$"; }
    elseif ($type=="email") { $Pattern = "^([0-9a-z]+)([0-9a-z\._-]+)@([0-9a-z\._-]+)\.([0-9a-z]+)"; }
    elseif ($type=="phone") { $Pattern = "^([0-9]{3})-([0-9]{4})-([0-9]{4})"; }
    $valid=ereg($Pattern, $var);
    return $valid;

} # end of Function

Call it thus:

$valid=ValidateInput($email, "email");
if (!$valid) { echo "You email address sux!"; }

😉

As I said, this is just one way, and a little more than you asked for, but it worx....

HAND,

ThinkGeekness

Cool, thanks.

One more question, where would I put that code? I have the form which calls another php page.

Thanks

dalecosp

Well, let's think(Geekness) now, you can't put it in the form, 'cuz PHP is server-side, so I guess it'll go in the handler script? 😉

😃

P.S. And that's true, of course. And no insult intended. Have fun w/PHP!

ThinkGeekness

lol, here is what I have but it isn't working:

<?

function ValidateInput($var, $type) { 

    trim($var); 
    if ($type=="name") { $Pattern = "^[A-Z][c]?[A-Z]?[a-z]+[a-z]$"; } 
    elseif ($type=="email") { $Pattern = "^([0-9a-z]+)([0-9a-z._-]+)@([0-9a-z._-]+).([0-9a-z]+)"; } 
    elseif ($type=="phone") { $Pattern = "^([0-9]{3})-([0-9]{4})-([0-9]{4})"; } 
    $valid=ereg($Pattern, $var); 
    return $valid; 

} # end of Function

$valid=ValidateInput($email, "email"); 
if (!$valid) { echo "You email address sux!"; }


$DBhost = "localhost";
$DBuser = "user";
$DBpass = "password";
$DBName = "db";
$table = "table";
mysql_connect($DBhost,$DBuser,$DBpass) or die("Unable to connect to database");

@mysql_select_db("$DBName") or die("Unable to select
database $DBName");

$sqlquery = "INSERT INTO $table
VALUES('$id','$name','$email')";

$results = mysql_query($sqlquery);

mysql_close();

include("success.php");
?>

Is that correct?

Thanks

dalecosp

Are register_globals ON or OFF?

And, what results are you getting?

ThinkGeekness

register_globals On

I am getting the success page (success.php)

dalecosp

So, you input an invalid email address, and you get the success page, but not "Your email address sux!"?? Is $email for sure being passed to the handler script?

BTW, prolly would need:

$valid=ValidateInput($email, "email"); 
if (!$valid) { 
   echo "Your email address sux!"; 
   exit();
}

ThinkGeekness

There we go, with the part added makes it work.

But there is one thing.

If I enter:

test@domain

it works still. Everything else works correctly. Is there anyway to require a .(com)(net)(etc.)

Thanks for your help

dalecosp

Dadgum it! Didn't copy that correctly. You need to escape that last . (dot) with an \

fizzwizz

But there is one thing.

If I enter:

test@domain

it works still. Everything else works correctly. Is there anyway to require a .(com)(net)(etc.)

I have the same problem!

You need to escape that last . (dot) with an \

I don't understand what you mean ... could you be more explicit?

Thanks ... Fizz

dalecosp

Originally posted by fizzwizz
I have the same problem!

I don't understand what you mean ... could you be more explicit?

Thanks ... Fizz

change:

elseif ($type=="email") { $Pattern = "^([0-9a-z]+)([0-9a-z._-]+)@([0-9a-z._-]+).([0-9a-z]+)"; }

to:

elseif ($type=="email") { $Pattern = "^([0-9a-z]+)([0-9a-z._-]+)@([0-9a-z._-]+)\.([0-9a-z]+)"; }

Is that explicit enough, or do I need to curse, like on IRC :eek: ?

😃 😃

HTH,

fizzwizz

Thanks for that!

Is this the second time you have mentioned irc to me?

I there something I don't know? 😃

dalecosp

Originally posted by fizzwizz
Thanks for that!

Is this the second time you have mentioned irc to me?

I there something I don't know? 😃

LOL, with 2500 posts you think I'd remember?

I chat waaaaay too much around here...why would I need IRC?

🙂