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# strtoupper

(PHP 3, PHP 4 )

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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