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strtoupper

PHP function Edit on GitHub ✎

(PHP 4, PHP 5, PHP 7, PHP 8)

Make a string uppercase

Description

strtoupper(string $string): string

Returns string with all ASCII alphabetic characters converted to uppercase.

Bytes in the range "a" (0x61) to "z" (0x7a) will be converted to the corresponding uppercase letter by subtracting 32 from each byte value.

This can be used to convert ASCII characters within strings encoded with UTF-8, since multibyte UTF-8 characters will be ignored. To convert multibyte non-ASCII characters, use mb_strtoupper().

Parameters

string: The input string.

Return Values

Returns the uppercased string.

Changelog

Version	Description

Examples

strtoupper() example

php

<?php
$str = "Mary Had A Little Lamb and She LOVED It So";
$str = strtoupper($str);
echo $str; // Prints MARY HAD A LITTLE LAMB AND SHE LOVED IT SO
?>