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# strtoupper

(PHP 3 <= 3.0.18, PHP 4 >= 4.0.0)

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
    $str = "Mary Had A Little Lamb and She LOVED It So";
    $str = strtoupper($str);
    print $str; # Prints MARY HAD A LITTLE LAMB AND SHE LOVED IT SO

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

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