how to post two field values in one variable

Question

I have two fields

<form action="insert.php" method="post">
Firstname: <input type="text" name="firstname" />

Lastname: <input type="text" name="lastname" />

Age: <input type="text" name="age" />
<input type="submit" />
</form>

how to post name and lastname in one variable meaning in one field of database is it

<?php
    $name=$_post['firstname']['lastname'];
?>

Answer 1

Actually you have three fields. Use string concatenation (or implode):

$name = $_POST['firstname'] . ' ' . $_POST['lastname'];

And don't forget to use mysql_real_escape_string (or what @ThiefMaster says) if you store the values in a database. Never trust user input.

Answer 2

Just concatenate the two values e.g.

<?php
    $name = $_POST['firstname'] . $_POST['lastname'];
?>

Answer 3

keep an array, and serialize it to store it.

$name['firstname']=$_post['firstname'];

$name['lastname']=$_post['lastname'];

//storage and retrieval methods 
$stored_name = serialize($name);

$name = unserialize($stored_name);

This way you don't lose the functionality of having the variables separate in an array, and you can always concatenate them later for display if you need to.