Help with Previous Page Code

[kamelion0927]

I'm trying to alter product_info_display.php so that if the customer gets to that page from featured products, instead of seeing the prev and next buttons, they see a "back to featured products" button but am having trouble with the correct variable to use.

I thought the easiest way to implement this change would be to use the zen_back_link() function so I've tried several variations such as

<!--bof Top Navigation-->
<?php if ($link == 'featured_products') { ?>
<div class="backtoFeatured"><?php echo '<a href="' . zen_href_link(FILENAME_FEATURED_PRODUCTS) . '">' . zen_image_button(BUTTON_IMAGE_BACK, BUTTON_BACK_ALT) . '</a>'; ?></div>
<?php } else { ?>
<!--bof Prev/Next top position -->
<?php if (PRODUCT_INFO_PREVIOUS_NEXT == 1 or PRODUCT_INFO_PREVIOUS_NEXT == 3) { ?>
<?php
/**
 * display the product previous/next helper
 */
require($template->get_template_dir('/tpl_products_next_previous.php',DIR_WS_TEMPLATE, $current_page_base,'templates'). '/tpl_products_next_previous.php'); ?>
<?php } ?>
<!--eof Prev/Next top position-->
<?php } ?>
<!--eof Top Navigation-->

and

<!--bof Top Navigation-->
<?php if (zen_back_link() == 'featured_products') { ?>
<div class="backtoFeatured back"><?php echo '<a href="' . zen_href_link(FILENAME_FEATURED_PRODUCTS) . '">' . zen_image_button(BUTTON_IMAGE_BACK, BUTTON_BACK_ALT) . '</a>'; ?></div>
<?php } else { ?>
<!--bof Prev/Next top position -->
<?php if (PRODUCT_INFO_PREVIOUS_NEXT == 1 or PRODUCT_INFO_PREVIOUS_NEXT == 3) { ?>
<?php
/**
 * display the product previous/next helper
 */
require($template->get_template_dir('/tpl_products_next_previous.php',DIR_WS_TEMPLATE, $current_page_base,'templates'). '/tpl_products_next_previous.php'); ?>
<?php } ?>
<!--eof Prev/Next top position-->
<?php } ?>
<!--eof Top Navigation-->

but I'm obviously oblivious as to what the correct variable is. Any assistance would be greatly appreciated.

[gaurav10feb]

..you might wanna try
use
$backlink = zen_back_link();
$page = featured_products

if(preg_match($page,$backlink))

I haven't tested it though. let us know

[kamelion0927]

I really appreciate your help! Unfortunately that code didn't work (I got the error PHP Warning: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Delimiter must not be alphanumeric or backslash) but I am really, really grateful for you taking the time to look at it.

I (finally) found that this bit of code worked:

<!--bof Top Navigation-->
<?php if ($_SERVER['HTTP_REFERER'] == 'http://www.theburningbutterfly.com/store/Snow_Angel'){ ?>
<div class="backtoFeatured"><?php echo '<a href="' . zen_href_link(FILENAME_FEATURED_PRODUCTS) . '">' . zen_image_button(BUTTON_IMAGE_BACK, BUTTON_BACK_ALT) . '</a>'; ?></div> 
<?php } else { ?>
<!--bof Prev/Next top position -->
<?php if (PRODUCT_INFO_PREVIOUS_NEXT == 1 or PRODUCT_INFO_PREVIOUS_NEXT == 3) { ?>
<?php
/**
 * display the product previous/next helper
 */
require($template->get_template_dir('/tpl_products_next_previous.php',DIR_WS_TEMPLATE, $current_page_base,'templates'). '/tpl_products_next_previous.php'); ?>
<?php } ?>
<!--eof Prev/Next top position-->
<?php } ?>
<!--eof Top Navigation-->

I'm a little nervous about having a full url in my code, but after literally hours of staring at (and searching for answers regarding) the zen_back_link function, I'm so sick of it and I'll just deal with the consequences.

It doesn't mean, however, that I'm not open to more competent ways of accomplishing my goal if anyone has suggestions.

[kamelion0927]

Using

<?php if ($_SERVER['HTTP_REFERER'] == zen_href_link(FILENAME_FEATURED_PRODUCTS)){ ?>

works just as well.