- ucwords: documentation ( source)
- strtoupper: documentation ( source)
- strtolower: documentation ( source)
- ucfirst: documentation ( source)
<?php
$lowercase = "cats";
$uppercase = "DOGS";
$multiplewords = "the cats and the dogs";
echo strtoupper($lowercase);
echo "</br>";
echo strtolower($uppercase);
echo "</br>";
echo ucfirst($lowercase);
echo "</br>";
echo ucwords($multiplewords);
echo "</br>";
?>