ajuda num codigo

[tiagoac]

oi voces poderiam me ajudar num codigo, estou começando e me deram uma tarefa de descrever o que o programa faz detalhado, se puder me adudar ficarei grato...

no caso esse codigo e para o e-commerce do zen cart....

abçs...

<?php

/**

* product_listing module

*

* @package modules

* @copyright Copyright 2003-2011 Zen Cart Development Team

* @copyright Portions Copyright 2003 osCommerce

* @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0

* @version $Id: product_listing.php 18695 2011-05-04 05:24:19Z drbyte $

*/

if (!defined('IS_ADMIN_FLAG')) {

die('Illegal Access');

}

$show_submit = zen_run_normal();

$listing_split = new splitPageResults($listing_sql, MAX_DISPLAY_PRODUCTS_LISTING, 'p.products_id', 'page');

$zco_notifier->notify('NOTIFY_MODULE_PRODUCT_LISTING_RESULTCOUNT', $listing_split->number_of_rows);

$how_many = 0;

$list_box_contents[0] = array('params' => 'class=productListing-rowheading"');

$zc_col_count_description = 0;

$lc_align = '';

for ($col=0, $n=sizeof($column_list); $col<$n; $col++) {

switch ($column_list[$col]) {

case 'PRODUCT_LIST_MODEL':

$lc_text = TABLE_HEADING_MODEL;

$lc_align = '';

$zc_col_count_description++;

break;

case 'PRODUCT_LIST_NAME':

$lc_text = TABLE_HEADING_PRODUCTS;

$lc_align = '';

$zc_col_count_description++;

break;

case 'PRODUCT_LIST_MANUFACTURER':

$lc_text = TABLE_HEADING_MANUFACTURER;

$lc_align = '';

$zc_col_count_description++;

break;

case 'PRODUCT_LIST_PRICE':

$lc_text = TABLE_HEADING_PRICE;

$lc_align = 'right' . (PRODUCTS_LIST_PRICE_WIDTH > 0 ? '" width="' . PRODUCTS_LIST_PRICE_WIDTH : '');

$zc_col_count_description++;

break;

case 'PRODUCT_LIST_QUANTITY':

$lc_text = TABLE_HEADING_QUANTITY;

$lc_align = 'right';

$zc_col_count_description++;

break;

case 'PRODUCT_LIST_WEIGHT':

$lc_text = TABLE_HEADING_WEIGHT;

$lc_align = 'right';

$zc_col_count_description++;

break;

case 'PRODUCT_LIST_IMAGE':

$lc_text = TABLE_HEADING_IMAGE;

$lc_align = 'center';

$zc_col_count_description++;

break;

}

if ( ($column_list[$col] != 'PRODUCT_LIST_IMAGE') ) {

$lc_text = zen_create_sort_heading($_GET['sort], $col+1, $lc_text);

}

$list_box_contents[0][$col] = array('align' => $lc_align,

'params' => 'class=productListing-heading"',

'text' => $lc_text );

}

if ($listing_split->number_of_rows > 0) {

$rows = 0;

$listing = $db->Execute($listing_split->sql_query);

$extra_row = 0;

while (!$listing->EOF) {

$rows++;

if ((($rows-$extra_row)/2) == floor(($rows-$extra_row)/2)) {

$list_box_contents[$rows] = array('params' => 'class="productListing-even"');

} else {

$list_box_contents[$rows] = array('params' => 'class="productListing-odd"');

}

$cur_row = sizeof($list_box_contents) - 1;

for ($col=0, $n=sizeof($column_list); $col<$n; $col++) {

$lc_align = '';

switch ($column_list[$col]) {

case 'PRODUCT_LIST_MODEL':

$lc_align = '';

$lc_text = $listing->fields['products_model];

break;

case 'PRODUCT_LIST_NAME':

$lc_align = '';

$lc_text = '<h3 class="itemTitle"><a href="' . zen_href_link(zen_get_info_page($listing->fields['products_id']), 'cPath= . (($_GET['manufacturers_id] > 0 and $_GET['filter_id'] > 0) ? zen_get_generated_category_path_rev($_GET['filter_id']) : ($_GET['cPath'] > 0 ? zen_get_generated_category_path_rev($_GET['cPath']) : zen_get_generated_category_path_rev($listing->fields['master_categories_id']))) . '&products_id= . $listing->fields['products_id]) . '">' . $listing->fields['products_name'] . '</a></h3><div class=listingDescription">' . zen_trunc_string(zen_clean_html(stripslashes(zen_get_products_description($listing->fields['products_id], $_SESSION['languages_id']))), PRODUCT_LIST_DESCRIPTION) . '</div>';

break;

case 'PRODUCT_LIST_MANUFACTURER':

$lc_align = '';

$lc_text = '<a href=' . zen_href_link(FILENAME_DEFAULT, 'manufacturers_id=' . $listing->fields['manufacturers_id]) . '">' . $listing->fields['manufacturers_name'] . '</a>';

break;

case 'PRODUCT_LIST_PRICE':

$lc_price = zen_get_products_display_price($listing->fields['products_id']) . '<br />';

$lc_align = 'right';

$lc_text = $lc_price;

// more info in place of buy now

$lc_button = '';

if (zen_has_product_attributes($listing->fields['products_id']) or PRODUCT_LIST_PRICE_BUY_NOW == '0') {

$lc_button = '<a href=' . zen_href_link(zen_get_info_page($listing->fields['products_id]), 'cPath=' . (($_GET['manufacturers_id'] > 0 and $_GET['filter_id']) > 0 ? zen_get_generated_category_path_rev($_GET['filter_id']) : ($_GET['cPath'] > 0 ? $_GET['cPath'] : zen_get_generated_category_path_rev($listing->fields['master_categories_id']))) . '&products_id= . $listing->fields['products_id]) . '">' . MORE_INFO_TEXT . '</a>';

} else {

if (PRODUCT_LISTING_MULTIPLE_ADD_TO_CART != 0) {

if (

// not a hide qty box product

$listing->fields['products_qty_box_status'] != 0 &&

// product type can be added to cart

zen_get_products_allow_add_to_cart($listing->fields['products_id']) != 'N'

&&

// product is not call for price

$listing->fields['product_is_call'] == 0

&&

// product is in stock or customers may add it to cart anyway

($listing->fields['products_quantity'] > 0 || SHOW_PRODUCTS_SOLD_OUT_IMAGE == 0) ) {

$how_many++;

}

// hide quantity box

if ($listing->fields['products_qty_box_status'] == 0) {

$lc_button = '<a href=' . zen_href_link($_GET['main_page], zen_get_all_get_params(array('action')) . 'action=buy_now&products_id=' . $listing->fields['products_id']) . '">' . zen_image_button(BUTTON_IMAGE_BUY_NOW, BUTTON_BUY_NOW_ALT, 'class=listingBuyNowButton"') . '</a>';

} else {

$lc_button = TEXT_PRODUCT_LISTING_MULTIPLE_ADD_TO_CART . "<input type=\"text\" name=\"products_id[" . $listing->fields['products_id] . "]\" value=\"0\" size=\"4\" />";

}

} else {

// qty box with add to cart button

if (PRODUCT_LIST_PRICE_BUY_NOW == '2' && $listing->fields['products_qty_box_status'] != 0) {

$lc_button= zen_draw_form('cart_quantity', zen_href_link($_GET['main_page'], zen_get_all_get_params(array('action')) . 'action=add_product&products_id= . $listing->fields['products_id]), 'post', 'enctype="multipart/form-data"') . '<input type="text" name="cart_quantity" value="' . (zen_get_buy_now_qty($listing->fields['products_id'])) . '" maxlength=6" size="4" /><br />' . zen_draw_hidden_field('products_id', $listing->fields['products_id]) . zen_image_submit(BUTTON_IMAGE_IN_CART, BUTTON_IN_CART_ALT) . '</form>';

} else {

$lc_button = '<a href="' . zen_href_link($_GET['main_page'], zen_get_all_get_params(array('action')) . 'action=buy_now&products_id= . $listing->fields['products_id]) . '">' . zen_image_button(BUTTON_IMAGE_BUY_NOW, BUTTON_BUY_NOW_ALT, 'class="listingBuyNowButton"') . '</a>';

}

}

}

$the_button = $lc_button;

$products_link = '<a href="' . zen_href_link(zen_get_info_page($listing->fields['products_id']), 'cPath= . ( ($_GET['manufacturers_id] > 0 and $_GET['filter_id']) > 0 ? zen_get_generated_category_path_rev($_GET['filter_id']) : $_GET['cPath'] > 0 ? zen_get_generated_category_path_rev($_GET['cPath']) : zen_get_generated_category_path_rev($listing->fields['master_categories_id'])) . '&products_id= . $listing->fields['products_id]) . '">' . MORE_INFO_TEXT . '</a>';

$lc_text .= '<br />' . zen_get_buy_now_button($listing->fields['products_id'], $the_button, $products_link) . '<br />' . zen_get_products_quantity_min_units_display($listing->fields['products_id']);

$lc_text .= '<br />' . (zen_get_show_product_switch($listing->fields['products_id'], 'ALWAYS_FREE_SHIPPING_IMAGE_SWITCH') ? (zen_get_product_is_always_free_shipping($listing->fields['products_id']) ? TEXT_PRODUCT_FREE_SHIPPING_ICON . '<br />' : '') : '');

break;

case 'PRODUCT_LIST_QUANTITY':

$lc_align = 'right';

$lc_text = $listing->fields['products_quantity'];

break;

case 'PRODUCT_LIST_WEIGHT':

$lc_align = 'right';

$lc_text = $listing->fields['products_weight'];

break;

case 'PRODUCT_LIST_IMAGE':

$lc_align = 'center';

if ($listing->fields['products_image'] == '' and PRODUCTS_IMAGE_NO_IMAGE_STATUS == 0) {

$lc_text = '';

} else {

if (isset($_GET['manufacturers_id'])) {

$lc_text = '<a href=' . zen_href_link(zen_get_info_page($listing->fields['products_id]), 'cPath=' . (($_GET['manufacturers_id'] > 0 and $_GET['filter_id']) > 0 ? zen_get_generated_category_path_rev($_GET['filter_id']) : ($_GET['cPath'] > 0 ? zen_get_generated_category_path_rev($_GET['cPath']) : zen_get_generated_category_path_rev($listing->fields['master_categories_id']))) . '&products_id= . $listing->fields['products_id]) . '">' . zen_image(DIR_WS_IMAGES . $listing->fields['products_image'], $listing->fields['products_name'], IMAGE_PRODUCT_LISTING_WIDTH, IMAGE_PRODUCT_LISTING_HEIGHT, 'class=listingProductImage"') . '</a>';

} else {

$lc_text = '<a href="' . zen_href_link(zen_get_info_page($listing->fields['products_id]), 'cPath=' . (($_GET['manufacturers_id'] > 0 and $_GET['filter_id']) > 0 ? zen_get_generated_category_path_rev($_GET['filter_id']) : ($_GET['cPath'] > 0 ? zen_get_generated_category_path_rev($_GET['cPath']) : zen_get_generated_category_path_rev($listing->fields['master_categories_id']))) . '&products_id= . $listing->fields['products_id]) . '">' . zen_image(DIR_WS_IMAGES . $listing->fields['products_image'], $listing->fields['products_name'], IMAGE_PRODUCT_LISTING_WIDTH, IMAGE_PRODUCT_LISTING_HEIGHT, 'class=listingProductImage"') . '</a>';

}

}

break;

}

$list_box_contents[$rows][$col] = array('align' => $lc_align,

'params' => 'class="productListing-data"',

'text' => $lc_text);

}

// add description and match alternating colors

//if (PRODUCT_LIST_DESCRIPTION > 0) {

// $rows++;

// if ($extra_row == 1) {

// $list_box_description = "productListing-data-description-even";

// $extra_row=0;

// } else {

// $list_box_description = "productListing-data-description-odd";

// $extra_row=1;

// }

// $list_box_contents[$rows][] = array('params' => 'class="' . $list_box_description . '" colspan="' . $zc_col_count_description . '"',

// 'text' => zen_trunc_string(zen_clean_html(stripslashes(zen_get_products_description($listing->fields['products_id], $_SESSION['languages_id']))), PRODUCT_LIST_DESCRIPTION));

//}

$listing->MoveNext();

}

$error_categories = false;

} else {

$list_box_contents = array();

$list_box_contents[0] = array('params' => 'class="productListing-odd"');

$list_box_contents[0][] = array('params' => 'class="productListing-data"',

'text' => TEXT_NO_PRODUCTS);

$error_categories = true;

}

if (($how_many > 0 and $show_submit == true and $listing_split->number_of_rows > 0) and (PRODUCT_LISTING_MULTIPLE_ADD_TO_CART == 1 or PRODUCT_LISTING_MULTIPLE_ADD_TO_CART == 3) ) {

$show_top_submit_button = true;

} else {

$show_top_submit_button = false;

}

if (($how_many > 0 and $show_submit == true and $listing_split->number_of_rows > 0) and (PRODUCT_LISTING_MULTIPLE_ADD_TO_CART >= 2) ) {

$show_bottom_submit_button = true;

} else {

$show_bottom_submit_button = false;

}

if ($how_many > 0 && PRODUCT_LISTING_MULTIPLE_ADD_TO_CART != 0 and $show_submit == true and $listing_split->number_of_rows > 0) {

// bof: multiple products

echo zen_draw_form('multiple_products_cart_quantity', zen_href_link(FILENAME_DEFAULT, zen_get_all_get_params(array('action')) . 'action=multiple_products_add_product', $request_type), 'post', 'enctype="multipart/form-data"');

}