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strtoupper() Function in PHP

In PHP the strtoupper() function is used to converts a string to uppercase.

strtoupper(string)

<!DOCTYPE html>
<html>
<body>
<?php echo strtoupper("students tutorial!"); ?>
</body>
</html>

Output

STUDENTS TUTORIAL!

<!DOCTYPE html>
<html>
<body>
<?php echo strtoupper("WeLcoMe TO Students Tutorial!"); ?>
</body>
</html>

Output

WELCOME TO STUDENTS TUTORIAL!