我正在与Interspire购物车以及我狡猾的编码技巧再次交锋。 :)为什么这个PHP函数不能传递所有的变量数据?
我的目标是创建一个类似于BHphotovideo.com首页上类别块的类别列表(崇高?)。 :)我相信这是一款即使免费购物车也能提供的功能,但不会在ISC中预建。我只想要一个包含父类别下的子类别的所有顶级类别的可点击列表。下面的代码的伟大工程,当我把它粘贴到空白的PHP文件,但我需要将此融入ISC所以链接的点击能和上市是面板:
<?php
// Make a MySQL Connection
$cn = mysql_connect("localhost", "mydbuser", "password") or die(mysql_error());
mysql_select_db("mydb") or die(mysql_error());
$rs = mysql_query("SELECT categoryid, catparentid, catname FROM isc_categories", $cn)
or die(mysql_error());
$childrenTree = array(); //Will store an array of children for each parent
$categoryNames = array(); //Will store category name for each id
//We fill $childrenTree and $categoryNames from database
while($row = mysql_fetch_array($rs)){
list($id, $parent_id, $category) = $row;
$categoryNames[(string)$id] = $category;
$parent_id = (string)$parent_id;
if(!array_key_exists($parent_id, $childrenTree))
$childrenTree[$parent_id] = array();
$childrenTree[$parent_id][] = (string)$id;
}
//Main recursive function. I'll asume '0' id is the root node
function renderTree($parent = "0"){
global $categoryNames;
global $childrenTree;
if($parent != "0") echo "<li> ", $categoryNames[$parent], "\n";
$children = $childrenTree[$parent];
if(count($children) > 0){ //If node has children
echo "<ul>\n";
foreach($children as $child)
renderTree($child);
echo "</ul>\n";
}
if($parent != "0") echo "</li>\n";
}
renderTree(); //This renders the hierarchical tree
?>
下面是我的最后一个(很多)试图将这些代码集成为一个独立的ISC面板。我只是不知道该去哪里。我用下面的代码得到的错误是:注意:未定义的变量:第31行的/includes/display/HomeCategoryList.php中的childrenTree
但是,childrenTree在_getcats函数中被定义为$ categorynames,脚本不会没有抱怨,所以我会认为它将$ categorynames的数据传递给renderTree函数,而不是$ childrenTress。它是否正确?
对于原始代码,函数_getcats不存在,并且不是必需的,但是下面将它添加到面板的脚本迫使我将该代码放入函数中。另外,如果我将数据库查询语法更改为与其他ISC文件中通常使用的语法相匹配,那么该脚本会抱怨此行的未定义变量:list($ id,$ parent_id,$ category)= $ row。我不知道为什么当查询应该返回相同的结果。
<?php
CLASS ISC_HOMECATEGORYLIST_PANEL extends PANEL
{
public function SetPanelSettings()
{
$GLOBALS['SideCategoryListTypeClass'] = 'SideCategoryListClassic';
$GLOBALS['SNIPPETS']['HomeCategoryList'] = $this->renderTree();
}
function _getcats(){
$rs = mysql_query("SELECT categoryid, catparentid, catname FROM isc_categories")
or die(mysql_error());
$childrenTree = array(); //Will store an array of children for each parent
$categoryNames = array(); //Will store category name for each id
while($row = mysql_fetch_array($rs)){
list($id, $parent_id, $category) = $row;
$categoryNames[(string)$id] = $category;
$parent_id = (string)$parent_id;
if(!array_key_exists($parent_id, $childrenTree))
$childrenTree[$parent_id] = array();
$childrenTree[$parent_id][] = (string)$id;
}
}
function renderTree($parent = "0"){
$this->_getcats();
if($parent != "0")echo "<li> ", $categoryNames[$parent], "\n";
$children = $childrenTree[$parent];
if(count($children) > 0){ //If node has children
echo "<ul>\n";
foreach($children as $child)
renderTree($child);
echo "</ul>\n";
}
if($parent != "0") echo "</li>\n";
}
}
如果您发现任何问题,我忽略了或认为您可能知道问题所在,请指出正确的方向。我已经呆了好几天了。 :)
谢谢!