[PHP] case insensitive sort

[Steve Buehler]

I am using the following function for a sort on an array.  I hope someone 
can help me out here and let me know how to change it to make it a "case 
insensitivie" sort.  Right now, it is "case sensitive" so the sort of the 
array will put the Capital letters first.  Here are the results of the search:
Buehler, Steve
Buehler, Steve
Teste, Teste
a, a
asdf, adsf
asdf, asdf
dsdlkj, sd

Here is the code to sort:
$GLOBALS[sortterm]="cont_name";
usort($logins, "cmp");
function cmp ($a, $b) {
GLOBAL $sortterm;
    return strcmp($a[$sortterm], $b[$sortterm]);
}
Thanks
Steve
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