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PHP: Manual
PHP Manual by the PHP Documentation Group php.net
PHP Manual
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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 (รค) 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().

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