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Evaluating an expression
| Re: Evaluating an expression [message #170853 is a reply to message #170852] |
Fri, 03 December 2010 14:50  |
Captain Paralytic
Messages: 204
Registered: September 2010
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Senior Member |
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On Dec 3, 2:19 pm, John <67fthu6o@kjkhfv> wrote:
> Clutching at straws here but I have a problem that seems to occur if
> the web users browser/system 'goes down' i.e. not very often.
>
> My specific question is, do these two expressions always equate to the
> same thing?
>
> if ($o1) {
>
> and
>
> if ($o1 == 1) {
>
> The variable is set as follows just before the above code:
>
> $o1 = $sql -> cust_comp;
>
> cust-comp is tinyint(1) default to zero on the database.
>
> The code allows someone to partially complete an order and then go
> back later until the order is sent. The cust_comp field is then
> written to the database with a value of 1. When customers continue
> processing (straight away or after logging in again) the system reads
> this value and assumes they want to now place a new order and
> processing continues with the new order.
>
> The problem I am getting is that the system seems to think the first
> order is complete when it is not (cust_comp is 0 on the database entry
> for the first order) and therefore starts a new one with the customer
> losing their previous order details.
>
> Hope that all makes sense. Really don't know where to look for this at
> the moment so any help gratefully accepted. I suspect the error may be
> elsewhere but I thought I would check this first.
>
> --
> John
($o1) is true for pretty much any value of $o1 except for false, 0,
'', whereas ($o1 == 1) is true only when $o1 is either 1 or '1', so
they do not by any means always relate to the same thing.
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