strtoupper

(PHP 4, PHP 5, PHP 7)

Make a string uppercase

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.

Parameters:

string

The input string.

Returns:

Returns the uppercased string.

Notes:

This function is binary-safe.

Examples:

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
?>