Using trim to get rid of whitespace

This shows how to use the trim function to remove white spaces from either side of a string

<?php
//trimming white space from a string
//our two strings
$string1 = " spaces before";
$string2 = " spaces before and after ";
//remove the whitespace
$trimmed_string1 = trim($string1);
$trimmed_string2 = trim($string2);
//display the text
echo $trimmed_string1;
echo "<br>";
echo $trimmed_string2;
?>