Description:
------------
this would probably make more immediate sense if you look at the code and the output result first, but heres the basics..

this is weird....
1) i have a string: "10,11,12,13,14,"
2) i remove the final comma by doing 
$groupstr[strlen($groupstr)-1]="";
3) i now have "10,11,12,13,14"
4) heres the weird part...i do mysql_escape_string() on it and i get: 10,11,12,13,14\0

basically, a visible \0 what looks like it should be a null is added to the end of the string.


Reproduce code:
---------------
<?
//This is really wacky (the mysql_escape_string output)
$groupstr="10,11,12,13,14,";
print $groupstr."<BR>";	
$groupstr[strlen($groupstr)-1]="";
print $groupstr."<BR>";	
print mysql_escape_string($groupstr);
			
print "<BR><BR><BR>";

//This works fine			
$groupstr="10,11,12,13,14,";
print $groupstr."<BR>";	
$groupstr=substr($groupstr,0,strlen($groupstr)-1);
print $groupstr."<BR>";	
print mysql_escape_string($groupstr);		
?>

Expected result:
----------------
10,11,12,13,14,
10,11,12,13,14
10,11,12,13,14


10,11,12,13,14,
10,11,12,13,14
10,11,12,13,14 

Actual result:
--------------
10,11,12,13,14,
10,11,12,13,14
10,11,12,13,14\0


10,11,12,13,14,
10,11,12,13,14
10,11,12,13,14