- strtoupper: documentation ( source)
- strtolower: documentation ( source)
- ucfirst: documentation ( source)
<?php
$title = "Little Book of Days";
$upper = strtoupper($title);
echo "The title in caps is:" .$upper. ".";
echo "The title in lowercase is:" .strtolower($title). ".";
$lower = strtolower($title);
echo "The title with first character uppercase is:" .ucfirst($lower). ".";