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Posted by Ivan Marsh on 02/27/07 21:07
On Tue, 27 Feb 2007 20:44:47 +0000, Tim Streater wrote:
> In article <1172596225.876668.42750@k78g2000cwa.googlegroups.com>,
> "Mitesh" <oopsbabies@hotmail.com> wrote:
>
>>
>> What I have discovered is re-using the $req variable is fine. While re-
>> using the $res produces undefined result (sometimes the second query
>> works fine and sometimes it doesn't. When I use different variables
>> like $res1 and $res2 the mysql queries always succeed. Is the initial
>> approach of re-using variable wrong if variables contain a
>> resource(reference type)?
>>
>> In other words since PHP uses garbage collection re-using the same
>> variable can cause problems. Is this true?
>
> Pass. But I systematically do mysql_free_result($res) whether I need to
> or not, not just before a re-use of $res in another query, but also at
> the end of the script. I don't know how it works internally or how much
> one needs to worry about this.
The resource gets freed automatically at the end of the script. It's
always a good idea to free something you're going to re-use in case your
code isn't working properly you could be left with old data still in the
resource that's hiding where your real issue is.
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