Is that over kill? No matter how I slam it, still referring to my
Frankensteinian merge, "unset" does the job.
http://testesp.flsh.usherbrooke.ca/db/trolley.php
But then again, I will not require a quanity of items. The visitor will
only want one copy of a bibliographic entry :-\ - I hope?!
You were checking to see if there was a greater than 1 quantity of
post[RNum], right?
Thanks,
John
//Delete an entry:
if( isset( $_SESSION['TrolleyContents'][$_POST['RNum']] ) )
{
# $_SESSION['TrolleyContents'][$_POST['RNum']] -= 1;
# if( $_SESSION['TrolleyContents'][$_POST['RNum']] <= 0 )
# {
unset( $_SESSION['TrolleyContents'][$_POST['RNum']] );
# }
}
Robert Cummings wrote:
Thanks for your time and patience,
John
The expression:
$trolley[$item] -= $quantity;
is a short form for the following:
$trolley[$item] = $trolley[$item] - $quantity;
Essentially we decrease the quantity of the given item by $quantity.
if( $trolley[$item] < 1 )
{
#Above we check if we subtracted more items than is physically possible
unset( $trolley[$item] );
#If there are 0 or less items then there's no point having 0 of the item
#in the trolley, so we unset the item from the array, which essentially
#removes it completely. To view the difference at each step you can do
#the following:
<?php
if( isset( $trolley[$item] ) )
{
echo "Trolley before removing $quantity of $item<br />";
trolleyPrint();
$trolley[$item] -= $quantity;
echo "Trolley after removing $quantity of $item<br />";
trolleyPrint();
if( $trolley[$item] < 1 )
{
unset( $trolley[$item] );
echo "Trolley after cleaning up empty entry for $item<br />";
trolleyPrint();
}
}
?>
Cheers,
Rob.
--
John Taylor-Johnston
-----------------------------------------------------------------------------
"If it's not Open Source, it's Murphy's Law."
' ' ' Collège de Sherbrooke:
ô¿ô http://www.collegesherbrooke.qc.ca/languesmodernes/
- 819-569-2064
°v° Bibliography of Comparative Studies in Canadian, Québec and Foreign Literatures
/(_)\ Université de Sherbrooke
^ ^ http://compcanlit.ca/ T: 819.569.2064
