PHP strtoupper()

The strtoupper() function converts all the characters in a string to uppercase.

Syntax

strtoupper(string_to_convert);

The string_to_convert parameter is the string that will be converted to uppercase.

Example

The following code demonstrates the use of strtoupper() to alter a string.

<?php
echo strtoupper("hello, world!");
?>

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The code results in the following:

HELLO, WORLD!

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