$lowercase = "this is lower case"; $uppercase = strtoupper($lowercase); echo $uppercase;
string strtoupper ( $string )
<?php $str = "Mary Had A Little Lamb and She LOVED It So"; $str = strtoupper($str); echo $str; // muestra: MARY HAD A LITTLE LAMB AND SHE LOVED IT SO ?>
$str = strtolower($str);