Two wrap a string you use the function wordwrap(): wordwrap("text", width, "line separator", cut); Example:

<?php 
    $string = "Hello! This is a really cool function."; 
    $wordwrap = wordwrap($string, 6, ""); 
    echo $wordwrap; 
?>

This will output:

-------
Hello!
This
is a
really
cool
function
.
-------

Notice that each line is about 6 characters long, UNLESS a word is longer than six characters. If you want the function to cut long words in half to fit NO MORE than six characters, put a '1' in the fourth parameter.

Example:

<?php 
    $string = "Hello! This is a really cool function."; 
    $wordwrap = wordwrap($string, 6, "",1); 
    echo $wordwrap; 
?>