form

[Masud16]

How Can I post a registration form by HTML code?

[Pullo]

Normally you send input from a HTML form back to a server-side script, specified in the form's action attribute.
The script will then do something with the input it receives, such as store it in a database.
E.g.

<form action="myScript.php" method="post">
...some form stuff here...
</form>

[Paul O'B]

If you want a simple form to email script then there are plenty of ready made scripts about.

[Shaydez]

<form action="registration.php" method="post">
 <input type='text' name='fname' />
</form>

registration.php

mail("your@email.com","The Registration" ,"Submitted by $fname") ; 

http://www.w3schools.com/php/php_mail.asp

[cpradio]

<form action="registration.php" method="post">
 <input type='text' name='fname' />
</form>

registration.php

mail("your@email.com","The Registration" ,"Submitted by $fname") ; 

http://www.w3schools.com/php/php_mail.asp

Whoa! First off, please try not to use w3schools.com for any examples, they are notorious for using insecure examples.

For example the following problems exist with the code chunk above.

1. It assumes register globals is enabled, register globals should NEVER be enabled, it is such a security risk the PHP developers eventually removed the feature all together.
2. It performs no validation, minor as it may be, this is necessary when wanting to prevent XSS and CSRF attacks

An updated example:

<form action="registration.php" method="post">
 <input type='text' name='fname' />
</form>

registration.php

$fname = filter_var($_POST['fname'], FILTER_SANITIZE_STRING);
mail("your@email.com","The Registration" ,"Submitted by $fname") ; 

You can read more about filter_var on the PHP manual and the type of filters as well.