newbie question i suppose

[wikstov]

i'm rather new to this, so please don't shoot me for asking something all too obvious

what is wrong with this code?

session_start();

$aantal=$_SESSION['aantal'];
echo $aantal;

while ($i<=$aantal){
if (isset($_POST['inschrijvingID[$i]']))$recs[]="inschrijvingID[$i]";
$i++;
}

if (is_array($recs)){
echo "OK";
if (count($recs)>1){
$where=join($recs,",");
$sql="UPDATE mytable SET field=value WHERE field IN ($where)";
}
}

i'd at least expect it to display "OK", but it doesn't
thanks to all of you who can help me out

[Ravenous]

First, initialize $i. You start using it without establishing the type of variable it is. Perhaps $i = 0? Second, try using $rec = Array(); Then start adding stuff to it.

[TheDefender]

You shouldn't necessarily need to define the array before adding to it... In theory, I could do this:

$array[0] = "Hello";
$array[1] = "world";
$array[2] = "I said hello!";
print_r($array);

And the script will recognize it as an array, and print it out just fine... It definitely doesn't hurt to define the array first though.

You are on the right track with the $i thing though...

[wikstov]

thanks a lot for your replies, i feel i'm slowly heading in the right direction!

this is the code i'm struggling on now:

$recs=Array();

for($i=0; $i<$aantal; $i++){
		if (isset($_POST['inschrijvingID[$i]']))$recs[$i]="inschrijvingID[$i]";
		$i++;
}

echo count($recs);

looking better?
still, however, no values are stored in $recs

what am i doing wrong?

thanks a lot in advance

edit: the inschrijvingID[] comes from this form:

<form name="form" method="post" action="testpost.php">

<?php do { ?>
                <tr> 
                  <td><?php echo $row_result['sporttakgegevens']; ?></td>
                  <td><input name="betalingID[]" type="checkbox" id="betalingID" value="<?php echo $row_betaling['betalingID']; ?>"></td>
                  <td><input name="inschrijvingID[]" type="hidden" id="inschrijvingID" value="<?php echo $row_result['inschrijvingID']; ?>"></td>
                </tr><br>
                <?php } while ($row_result = mysql_fetch_assoc($result)); ?>

<input type="submit" name="Submit" value="OK">

</form>

[dnast]

Maybe something's wrong with $inschrijvingID.

Try print_r($inschrijvingID) and see what comes out.

It be this:

id="inschrijvingID"

Maybe that should be inschrijvingID[] as well.

[wikstov]

thanks a lot for your reply

the problem is indeed with $inschrijvingID

for some reason, no array is created
anyone know why?

this is the code:

<form name="form" method="post" action="testpost.php">

<?php do { ?>
                <tr> 
                  <td><?php echo $row_result['sporttakgegevens']; ?></td>
                  <td><input name="betalingID[]" type="checkbox" value="<?php echo $row_betaling['betalingID']; ?>"></td>
                  <td><input name="inschrijvingID[]" type="hidden" value="<?php echo $row_result['inschrijvingID']; ?>"></td>
				<td><?php echo $row_result['inschrijvingID']; ?></td>	                

				</tr><br>
                <?php } while ($row_result = mysql_fetch_assoc($result)); ?>

<input type="submit" name="Submit" value="OK">

</form>
<?php if(is_array($inschrijvingID))echo "OK";?>