The following scriptet:

<?
  $myarr=split(",",",something,that,starts,with,the,deliminator");
?>
 
returns:
Warning: bad regular expression for split() in /www/splittest.php on line 2

and naturally doesn't assign anything to the $myarr array.

I suppose really you'd expect either to assign an empty value
to the first item in the array, or else to skip the leading
deliminator altogether...