Convert name to initials with php

[black-dog]

I was surprised I couldn't find a function to do this, but I didn't look too hard as this quick and dirty version wasn't too difficult to write.

function getInitials($name){
//split name using spaces
$words=explode(" ",$name);
$inits='';
//loop through array extracting initial letters
	foreach($words as $word){
	$inits.=strtoupper(substr($word,0,1));
	}
return $inits;	
}