Splitting up names

Sometimes you only have one text box for a user's whole name (first and last). Normally, though, we want to store it as first name and last name in a database for search purposes. Here is a quick way to split it up and to check that it was enter correctly at the same time.

if (!strpos($_POST['full_name'], ' ') return false;

$names = explode(' ', $_POST['full_name'], 2);
$first_name = $names[0];
$last_name = $names[1];

This will essentially split some input on the first blank space. The array it will return will hold the first name and then everything else. So if they entered the middle name with it, then the $names[1] will hold the middle and last name.