While typing this question I modified some things, which made me able to solve the problem. So I'm creating this "share the knowledge" if someone has the same problem.
Suppose the following names:
Assassin's Creed III
To make it default (and reduce space, because uppercase letters are larger than displayed), I use this:
$nome = ucwords( strtolower( $fonte['Nome'] ) );
Result:
The result is correct for the function.
What I want:
In order to only keep (or make) the Roman numerals in capital letters I created this, adapting it from some research.
<?php
$explodes = explode(' ', strtolower( $fonte['Nome'] ) );
// Isso irá forçar tudo para minusculo, afim de entrar no regex e quebrar os espaços.
foreach($explodes as $explode){
// Cria loop finito para cada palavra
if(!preg_match("/^m{0,4}(cm|cd|d?c{0,3})(xc|xl|l?x{0,3})(ix|iv|v?i{0,3})(.?)$/", $explode)){
$palavra .= ucfirst($explode).' ';
// Se não houver número romano a primeira letra é passada para maiúsculo.
}else{
$palavra .= strtoupper($explode).' ';
// Se houver número romano tudo é passado para maiúsculo.
}
}
echo rtrim($palavra, ' ');
// Remove ultimo espaço inserido e exibe.
?>
Result:
Other tests:
grand theft auto v > Grand Theft Auto V
final fantasy xv > Final Fantasy XV
final Fantasy Xiii > Final Fantasy XIII
FINAL FANTASY® XIV: A Realm Reborn > Final Fantasy® XIV: A Realm Reborn
For those who want to use it easier:
function nucword($frase){
$explodes = explode(' ', strtolower($frase) );
$palavra = '';
foreach($explodes as $explode){
if(!preg_match("/^m{0,4}(cm|cd|d?c{0,3})(xc|xl|l?x{0,3})(ix|iv|v?i{0,3})(.?)$/", $explode)){
$palavra .= ucfirst($explode).' ';
}else{
$palavra .= strtoupper($explode).' ';
}
}
return rtrim($palavra, ' ');
}
Use:
nucword('sua frase Ii');
// Sua Frase II
Example:
echo nucword('grand theft auto v');
// Grand Theft Auto V