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# strtoupper

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

      1
      2 $str = "Mary Had A Little Lamb and She LOVED It So";
      3 $str = strtoupper ($str);
      4 print $str; # Prints MARY HAD A LITTLE LAMB AND SHE LOVED IT SO
      5

See also strtolower() and ucfirst().

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