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Date: Wed, 2 Feb 2005 16:11:26 -0700
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Subject: PHP 5.0.3 Variable Bug or Something More?
From: me@uhduh.com (Chris Cowan)

I've ran across some strangeness which I can't figure out. When I run 
the following code I get a Seg Fault / Bus Error in my apache log 
(SegFault on Linux and Bus Error on Mac OS X).

		$rate_id = Core_Request::get('rate_id','integer',true);
		$plan_id = Core_Request::get('plan_id','integer',true);
		$min_seats = Core_Request::get('min_seats','integer',true);
		$max_seats = Core_Request::get('max_seats','integer',true);
		$rate = Core_Request::get('rate','float',true);
		$DB = Core_DB::getInstance();
		
		$query  = "update subscription_prices set ";
		$query .= "min_seats = $min_seats , ";
		$query .= "max_seats = $max_seats , ";
		$query .= "rate = $rate ";
		$query .= "where plan_id = $plan_id ";
		$query .= "and rate_id = $rate_id ";
		
		$DB->query($query);
		$DB->commit();

When I change the variable from $max_seats to $_max the error goes 
away. Also it appears that the $DB->query(); and $DB->commit(); calls 
are being executed and the session is being written to the database. 
I've also had this happen on the following:

		$flat_rate = Core_Request::get('flat_rate','float',true);
		$flat_seats = Core_Request::get('flat_seats','integer',true);
		$plan_id = Core_Request::get('plan_id','integer',true);

		$DB = Core_DB::getInstance();
		
		$query  = "update subscription_plans set ";
		$query .= "flat_seats = $flat_seats , ";
		$query .= "flat_rate = $flat_rate ";
		$query .= "where plan_id = $plan_id ";
	
		$DB->query($query);
		$DB->commit();

To fix this I ended up changing the name of the variables from 
$flat_seats and $flat_rate to $seats and $rates to get the bus error to 
disappear. I've tested this on Mac OS X Client 10.3.7 running Apache 
1.3.33 and PHP 5.0.3 as well as Debian Linux with the same set up. Here 
is the output from "ktrace httpd -X" with the crash at the bottom.

http://www.fwi-archive.com/~chris/debug.txt

Let me know if you need any more information.

Chris Cowan