Help Understanding Arrays

[Bruce]

I don't quite understand this. $result is the result of a mysql_query.

$requests = array();
while ($request = mysql_fetch_arr ay($result))
{
print("<p>");
print_r($reques t);
array_push($req uests, $request);
}

while ($request = each($requests) )
{
print("<p>");
print_r($reques t);
}

My thinking is that the while..each loop does the opposite of
array_push. However, this doesn't seem to be the case.

$request in the first loop looks like a single associative array.
$request in the second loop is a multidimensiona l associative array.

Can someone explain to me what is happening here?

--Bruce

[Pedro Graca]

Re: Help Understanding Arrays

Bruce wrote:[color=blue]
> while ($request = each($requests) )
> {
> print("<p>");
> print_r($reques t);
> }
>
> My thinking is that the while..each loop does the opposite of
> array_push. However, this doesn't seem to be the case.
>
> $request in the first loop looks like a single associative array.
> $request in the second loop is a multidimensiona l associative array.
>
> Can someone explain to me what is happening here?[/color]

You're misusing the each() function.

<quote src="http://www.php.net/each">
Returns the current key and value pair from the array array and
advances the array cursor. This pair is returned in a four-element
array, with the keys 0, 1, key, and value. Elements 0 and key contain
the key name of the array element, and 1 and value contain the data.
</quote>


Try this:

while (list($request_ k, $request_v) = each($requests) )
{
print("<p>");
print_r($reques t_v);
}


or, with foreach() (which I like much more then list() and each()):

foreach ($requests as $request)
{
print("<p>");
print_r($requet s);
}


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[Michael Fesser]

Re: Help Understanding Arrays

.oO(Bruce)
[color=blue]
>[...]
>
>My thinking is that the while..each loop does the opposite of
>array_push. However, this doesn't seem to be the case.[/color]

Correct. The opposite of array_push() is array_pop().
[color=blue]
>$request in the first loop looks like a single associative array.[/color]

Correct.
[color=blue]
>$request in the second loop is a multidimensiona l associative array.[/color]

You should have a look at the manual. each() returns a four-element
array which contains the key and the value of the current element from
the given array.

http://www.php.net/each

Micha