strtoupper ()
Make a string uppercase

Syntax : string strtoupper ( string $string )

Returns string with all alphabetic characters converted to uppercase

Parameters :
string : The input string
Return Values :
Returns the uppercased string.

Examples :

<?php
		$originalString = "String Capitalization 1234";
		$upperCase = strtoupper($originalString);

		echo "Old string - $originalString <br />";
		echo "New String - $upperCase";
?>

Display:
Old string – String Capitalization 1234
New String – STRING CAPITALIZATION 1234