php code for "if logged in" vs "if not logged in"

[p m]

the canada post shipping module doesn't work with the shipping estimator unless the customer is logged in. there's been a number of threads trying to fix this problem, but no luck.

as it is now, a not-logged-in customer who clicks the "estimate shipping" button on the shopping cart page on my site will get the little pop-up window to come up, but it won't work at all.

so i want to prevent not-logged-in customers from seeing the "estimate shipping" button in the first place.

in fact, what i'd like to do is put a different button or message in the same place, saying "please login to estimate shipping costs". that would link to the login page.

so what i need is a php command with the following logic:
(1) if login=true, then display "estimate shipping" button
(2) if login=false, then display "login for shipping" button

obviously i'll have to define BUTTON_IMAGE_LOGIN_FOR_SHIPPING_ESTIMATOR at some point. that's no problem. i just need help with how to code the if/else statement for logged in status.

the relevant code is in templates/tpl_shopping_cart_default.php :

<?php
    switch (true) {
      case (SHOW_SHIPPING_ESTIMATOR_BUTTON == '1'):
?>

<div class="forward"><?php echo '<a href="javascript:popupWindow(\'' . zen_href_link(FILENAME_POPUP_SHIPPING_ESTIMATOR) . '\')">' .
 zen_image_button(BUTTON_IMAGE_SHIPPING_ESTIMATOR, BUTTON_SHIPPING_ESTIMATOR_ALT) . '</a>'; ?></div>

<?php
      break;
      case (SHOW_SHIPPING_ESTIMATOR_BUTTON == '2'):
/**
 * load the shipping estimator code if needed
 */
?>
      <?php require(DIR_WS_MODULES . zen_get_module_directory('shipping_estimator.php')); ?>

the code is a bit more complicated than it would be because of the switch in admin-->configuration-->shipping which lets you decide whether to display a shipping estimator button (for the popup) or just the actual estimate on the same page. i'm planning to use a button, meaning

case (SHOW_SHIPPING_ESTIMATOR_BUTTON == '1'):

but i guess the proper way to code this would be to embed the switch (case 1 vs case 2) within the (if login vs if not-login) statement. that way logged in customers would see either the button or the shipping estimate, depending on how the switch is set, and not-logged in customers wouldn't see it either way.

hope that makes sense...

[Ajeh]

When this is defined: $_SESSION['customer_id']

Then the customer is logged in ...

[p m]

hurrah! it works...

in templates/tpl_shopping_cart.php the code above now reads:

<?php if ($_SESSION['customer_id']) { ?>

<?php
    switch (true) {
      case (SHOW_SHIPPING_ESTIMATOR_BUTTON == '1'):
?>

<div class="forward"><?php echo '<a href="javascript:popupWindow(\'' . zen_href_link(FILENAME_POPUP_SHIPPING_ESTIMATOR) . '\')">' .
 zen_image_button(BUTTON_IMAGE_SHIPPING_ESTIMATOR, BUTTON_SHIPPING_ESTIMATOR_ALT) . '</a>'; ?></div>

<?php
      break;
      case (SHOW_SHIPPING_ESTIMATOR_BUTTON == '2'):
/**
 * load the shipping estimator code if needed
 */
?>
      <?php require(DIR_WS_MODULES . zen_get_module_directory('shipping_estimator.php')); ?>

<?php
        break;
      }
?>
<?php 
 } else {
 ?>
 <div class="forward"><a href="<?php echo zen_href_link(FILENAME_LOGIN, '', 'SSL'); ?>"><?php echo LOGIN_FOR_SHIPPING_ESTIMATOR; ?></a></div>
 
<?php
             }
?>

i decided to use text instead of a button, since the phrase is too long. so i added this line to english.php

define('LOGIN_FOR_SHIPPING_ESTIMATOR', 'Please login for shipping estimate');

and it works! thanks for the help.

[saitomedia]

Dear Ajeh,

What is the php syntax for "if not logged in" ?

Thank you for your response in advance.

I tried <?php if ($messageStack->size('login') > 0) { ?> but it didn't work. I'm just trying anything I can find at the moment.

Is there such a thing without using "else"?

[saitomedia]

while passing the cart information to index.php?main_page=create_account

I hope I'm making sense.

[Ajeh]

Same as what I posted above ... use the $_SESSION['customer_id'] to determin if the customer is logged in or not ...

For example, a simple IF can use:

<?php
  if ($_SESSION['customer_id']  > 0) {
// I am logged in
  } else {
// I am not logged in
  }
?>

[saitomedia]

Thank you Ajeh!

By the way, here's the cart that I'm working on:

http://www.scienscope-products.com/

Hope you like this one, as it took me roughly 4 months to complete.

Nori

[Ajeh]

That is a very sharp looking ...

Too bad there isn't a nice link back to Zen Cart in the footer ...

Good luck with your site!

[saitomedia]

My apology ,

I will put the zen cart link back. I don't know why I removed it before, it must be because I was learning how to modify the line.

Thanks for your great comment Ajah

[Ajeh]

Thanks for making Zen Cart look so nice ... and for letting the world know about it too!