[PHP] Execute PHP

[RastaLulz]

Hey, I don't really know how to word this, but I'll try my best.

I was wondering if I could execute PHP from a non PHP page, or MySQL database.

Example 1:
index.php

<?php
$hello = "Hey,";
include("text.html");
?>

text.html

{$hello} I'm RastaLulz! 

Result (example 1):

Hey, I'm RastaLulz! 

Example 2:
index.php

<?php
include("config.php");
$name = "RastaLulz";
$id = $_GET['id'];
$query = mysql_query("SELECT * FROM pages WHERE `id` = '$id'");
$array = mysql_fetch_array($query);
$text = $array['text'];
echo $text;
?>

MySQL - text

Hey, my name is {$name}! 

Result:

Hey, my name is RastaLulz! 

If anyone could help me with this, it'd help a lot (if it makes any sense)!

[MentaL]

[FragFrog]

The template engine Smarty is designed to do exactly that :)