Formatting text in uppercase - uppercase

This is done with CSS:

div {
    text-transform: uppercase;
}

example: link

If you really want to do it in PHP you can use strtoupper for ISO-8859-1 and mb_strtoupper for UTF8

echo strtoupper('Texto'); // dá TEXTO

Carlos, the formatting of texts is characteristic of FRONT-END language, such as html, css, javascript and others, in PHP the string function strtoupper ($ text) may be worth it, however the most correct form is CSS with the 'font-variant' argument bringing something like 'small-caps', you can have a class that returns all the text in small caps for example.

You can have the same effect in javascript:

getElementByTagName("INPUT").style.fontVariant="small-caps";

< input type="text" value="default text" class="versalete" / >

in css:

.versalete{font-variant:small-caps;}