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(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
?>

Related Function(s)

strtolower()

ucfirst()

ucwords()

mb_strtoupper()