How do I make the contents of a string upper case?

If you want to make the whole contents of a string upper case, then just use the opposite of strtolower, which funnily enough is called strtoupper.

Here's the function in action:


<?php

$mystring = "can anybody hear me?";

echo strtoupper($mystring);

?>

Prints: CAN ANYBODY HEAR ME?

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How do I make the contents of a string upper case?

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