php-mysql-smarty从多个表中获取数据

Question

I have a problem. I can't solve it. I am not good in PHP-MySQL.

I have three tables.

First Table : linkss --> rows: linkid,link,orderlink

Second Table: sublinkss1 --> rows: sublink1id,sublink1,ordersublink1,link,linkid

Third table : sublinkss2 --> rows: sublink2id,sublink2,ordersublink2,sublink1,sublink1id

 $get_data=mysql_query("select linkss.link, sublinkss1.sublink1, sublinkss2.sublink2 from linkss,sublinkss1, sublinkss2 where sublinkss1.linkid=linkss.linkid and sublinkss2.sublink1id=sublinkss1.sublink1id order by orderlink, ordersublink1, ordersublink2");
 while ($row=mysql_fetch_assoc($get_data)) {
    $data[$row["link"]][$row["sublink1"]][$row["sublink2"]]=array($row["link"],$row["sublink1"],$row["sublink2"]);        
    }          
    $smarty = new Smarty();        
    $smarty->assign('data',$data);

and tpl file is this

<ul>
{foreach key=link from=$data item=linkss}
<li><a href="#">{$link}</a>
<ul>
{foreach key=sublink1 item=sublinkss1 from=$linkss }
<li><a href="#">
{$sublink1}
</a>

<ul>
{foreach key=sublink2 item=sublinkss2 from=$sublinkss1 }
<li><a href="#">
{$sublink2}
</a>

</li>
{/foreach}
</ul>

</li>
{/foreach}
</ul>

</li>
{/foreach}
</ul>

For example some datas are stored in the database and I want output like this

<ul>
<li>Home Page
<ul><li>Projects</li></ul>
</li>
<li>About Us
<ul><li>History</li></ul>
<ul><li>Products
<ul><li>Product1</li></ul>
<ul><li>Product2</li></ul>
<ul><li>Product3</li></ul>
</li></ul>
</li>
<li>Contact Us</li>
</ul>

But these codes are not working properly. I tried to use inner join and left join but I couldn't handle it. Could you help me please.

Answer 1

I think you'll need similar SQL-query as you wrote in your question. In this case you'll get similar lines:

link1,sublink1,subsublink1
link1,sublink1,subsublink2
link1,sublink1,subsublink3
link1,sublink2,subsublink4
link1,sublink2,subsublink5
link1,sublink2,subsublink6
...
link2,sublink3,subsublink7
...

You can rearrange this result to smarty:

current_link = ""; current_sublink = "";
desired_array = array();
foreach ($result as $r) {
    $desired_array[$r["link"]]["sublinks"][$r["sublink1"]][] = $r["sublink2"]; 
}

If I wrote it correct your result will convert into array like this:

array(
    "link1" => array(
         "sublinks" => array(
              "sublink1" => array("subsublink1","subsublink2",...),
              "sublink2" => array("subsublink3","susbulink4",...),
              ...
         )
    ),
    "link2" => array(
         // same as link1
    )
)

If you've link which doesn't have sublink you'll need FROM link LEFT JOIN sublink1 ON ... LEFT JOIN sublink2 ON... instead of FROM link,sublink1,sublink2 and you'll need a little modification in PHP-code.

In smarty: you'll need nested foreach :

<ul>
{foreach from=$desired_array key=link item=link_item}
   <li>{$link}
       <ul>
       {foreach from=$link_item["sublinks"] key=sublink1 item=sublink_item}
          <li>{$sublink1}
          <ul>
          {foreach from=$sublink item=sublink_item2}
             <li>{$sublink_item2}</li>
          {/foreach}
          </ul></li>
       {/foreach}
       </ul>
   </il>
 {/foreach}

Maybe these codes aren't perfect but I think it's a good starting point (you can include check that count of sublink array isn't zero, etc.)