seperating by words

Use explode()

[php]
<?php
$string = "hello world how are you?"; //string
$string = explode(' ', $string); //explode the string at spaces - into array
for($i = 0; $i < count($string); $i++){ // i = 0, while i is less than amount of pieces in array, increment i
echo $string[$i]."<br />"; // echo string array seperated by break tag
}
?>
[/php]