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().