O comando que vai converter uma string para maiúsculas é o strtoupper
1 2 3 4 5 | <?php $str = "Mary Had A Little Lamb and She LOVED It So"; $str = strtoupper($str); print $str; // Prints MARY HAD A LITTLE LAMB AND SHE LOVED IT SO ?> |
O Resultado será MARY HAD A LITTLE LAMB AND SHE LOVED IT SO
Valeu 🙂