PHP find and replace. Please help?

[Jerry]

<?php
// The text string
$text = "The quick brown fox jumped over the lazy dog.";
// The word we want to replace
$oldWord = "brown";
// The new word we want in place of the old one
$newWord = "blue";
// Run through the text and replaces all occurrences of $oldText
$text = str_replace($oldWord , $newWord , $text);
// Display the new text
echo $text;
?>

The current code will only replace one word. I need a code that will replace multiple word. Please help.