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这是一篇记录在日记里面的技术文档，其实是对ecshop的二次开发。主要作用是将一个子类对应多个父类，并指定条跳转url的功能。ecshop是一款在线购物网站，感兴趣的可以下载源码看看。我们看看具体是怎么修改的。
1、数据库表“表前缀_category”添加如下字段
alter TABLE `ga_category` add `assign_child` varchar(255) default NULL;alter TABLE `ga_category` add `jump_url` varchar(255) default NULL;
2、includes/lib_goods.php
get_categories_tree、get_child_tree函数中的
$cat_arr[$row['cat_id']]['url'] = build_uri('category', array('cid' => $row['cat_id']), $row['cat_name']); 改为
if(isset($row['jump_url']) != NULL && trim($row['jump_url']) != ''){ $cat_arr[$row['cat_id']]['url'] = $row['jump_url']; }else{ $cat_arr[$row['cat_id']]['url'] = build_uri('category', array('cid' => $row['cat_id']), $row['cat_name']); } 将
$three_arr[$row['cat_id']]['cat_id'] = get_child_tree($row['cat_id']);
改为
if(isset($row['assign_child']) != NULL && trim($row['assign_child']) != ''){ $three_arr[$row['cat_id']]['cat_id'] = get_assign_child_tree($row['assign_child']); }else{ $three_arr[$row['cat_id']]['cat_id'] = get_child_tree($row['cat_id']); } 将将获取子类的sql
$sql = 'SELECT cat_id,cat_name ,parent_id,is_show ' . 'FROM ' . $GLOBALS['ecs']->table('category') . "WHERE parent_id = '$parent_id' AND is_show = 1 ORDER BY sort_order ASC, cat_id ASC"; 改为（添加assign_child, jump_url两个字段用于查询用）
$sql = 'SELECT cat_id,cat_name ,parent_id,is_show, template_file, assign_child, jump_url ' . 'FROM ' . $GLOBALS['ecs']->table('category') . "WHERE parent_id = '$parent_id' AND is_show = 1 ORDER BY sort_order ASC, cat_id ASC"; 并添加函数
function get_assign_child_tree($tree_id = ''){ $three_arr = array(); if($tree_id == '') return $three_arr; $child_sql = 'SELECT cat_id, cat_name, parent_id, is_show, assign_child, jump_url ' . 'FROM ' . $GLOBALS['ecs']->table('category') . "WHERE cat_id in( $tree_id ) AND is_show = 1 ORDER BY sort_order ASC, cat_id ASC"; $res = $GLOBALS['db']->getAll($child_sql); foreach ($res AS $row) { if ($row['is_show']) $three_arr[$row['cat_id']]['id'] = $row['cat_id']; $three_arr[$row['cat_id']]['name'] = $row['cat_name']; if(isset($row['jump_url']) != NULL && trim($row['jump_url']) != ''){ $three_arr[$row['cat_id']]['url'] = $row['jump_url']; }else{ $three_arr[$row['cat_id']]['url'] = build_uri('category', array('cid' => $row['cat_id']), $row['cat_name']); } if (isset($row['cat_id']) != NULL) { if(isset($row['assign_child']) != NULL && trim($row['assign_child']) != ''){ $three_arr[$row['cat_id']]['cat_id'] = get_assign_child_tree($row['assign_child']); }else{ $three_arr[$row['cat_id']]['cat_id'] = get_child_tree($row['cat_id']); } } } return $three_arr;} 3、admin/category.php中作如下修改
在($_REQUEST['act'] == 'insert')、if ($_REQUEST['act'] == 'update')的条件中的
$cat['grade'] = !empty($_POST['grade']) ? intval($_POST['grade']) : 0;$cat['filter_attr'] = !empty($_POST['filter_attr']) ? implode(',', array_unique(array_diff($_POST['filter_attr'],array(0)))) : 0; 后面添加
$cat['jump_url'] = !empty($_POST['jump_url']) ? trim($_POST['jump_url']) : ''; $cat['assign_child'] = !empty($_POST['assign_child']) ? trim($_POST['assign_child']) : '';
4、在admin/templates/category_info.htm的
{$lang.assign_child}: 中添加
{$lang.jump_url}: 5、languages/zh-cn/admin/category.php中添加如下语言描述
$_LANG['jump_url']='跳转url（指定跳转至的url）';
$_LANG['assign_child']='指定子类（将其id填写在输入框中即可，多个是用应为的“,”号隔开）';