PHP Manual
Prev |  | Next

# strtoupper

(PHP 3, PHP 4, PHP 5)

strtoupper -- Make a string uppercase

## Description

string strtoupper ( string string )

Returns string with all alphabetic characters converted to uppercase.

Note that 'alphabetic' is determined by the current locale. For instance, in the default "C" locale characters such as umlaut-a (ä) will not be converted.

Example 1. strtoupper() example

`<?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 ?>`

> Note: This function is binary-safe.

See also strtolower(), ucfirst(), ucwords() and mb_strtoupper().

Prev | Home | Next
strtolower | Up | strtr