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Re: mysql_fetch_array [message #169808 is a reply to message #169806]

Mon, 27 September 2010 13:18

MikeB
Messages: 65
Registered: September 2010

Karma:

Member

matt wrote:
> On Sep 25, 4:28 pm, MikeB<mpbr...@gmail.com> wrote:
>> I have the following code:
>>
>> $query = "SELECT * FROM classics";
>> $result = mysql_query($query);
>>
>> if (!$result) die ("Database access failed: " . mysql_error());
>> $rows = mysql_num_rows($result);
>>
>> for ($j = 0 ; $j< $rows ; ++$j)
>> {
>> $results[] = mysql_fetch_array($result);
>>
>> }
>
> This doesn't make much sense to me, unless you need the value of $rows
> later on...
>
> how about this instead:
>
> if (!$result = mysql_query("..."))
> die ("...");
>
> while ($row = mysql_fetch_array($result))
> $results[] = $row;
>
> You're defining two additional variables that are totally unneeded.
> Of course some pedant is probably going to jump down my throat for
> putting assignments in my conditionals...
>
How efficient is it to call the mysql_fetch_array($result) function
every time for the the loop evaluation vs.comparing with a variable
that is set once?

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[Message index]

		mysql_fetch_array By: MikeB on Sat, 25 September 2010 20:28
		Re: mysql_fetch_array By: Marious Barrier on Sat, 25 September 2010 21:08
		Re: mysql_fetch_array By: TechieOldFox on Sat, 25 September 2010 21:50
		Re: mysql_fetch_array By: Captain Paralytic on Sat, 25 September 2010 22:50
		Re: mysql_fetch_array By: MikeB on Sat, 25 September 2010 23:36
		Re: mysql_fetch_array By: Captain Paralytic on Sun, 26 September 2010 11:44
		Re: mysql_fetch_array By: sheldonlg on Sun, 26 September 2010 23:24
		Re: mysql_fetch_array By: The Natural Philosoph on Mon, 27 September 2010 07:15
		Re: mysql_fetch_array By: sheldonlg on Mon, 27 September 2010 12:23
		Re: mysql_fetch_array By: Hamish Campbell on Mon, 27 September 2010 07:44
		Re: mysql_fetch_array By: matt[1] on Mon, 27 September 2010 12:37
		Re: mysql_fetch_array By: MikeB on Mon, 27 September 2010 13:18
		Re: mysql_fetch_array By: Captain Paralytic on Mon, 27 September 2010 13:35
		Re: mysql_fetch_array By: MikeB on Mon, 27 September 2010 14:12

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