PHP樹輸出<table>標籤

Question

我們從mysqli的查詢輸出數組：

Array 
(
    [0] => Array 
     (
      [value] => value1 
      [id] => 1 
      [title] => title1 
      [parent_id] => 0 
     ) 

    [1] => Array 
     (
      [value] => value2 
      [id] => 2 
      [title] => title2 
      [parent_id] => 1 
     ) 

    [2] => Array 
     (
      [value] => value3 
      [id] => 3 
      [title] => title3 
      [parent_id] => 0 
     ) 

    [3] => Array 
     (
      [value] => value4 
      [id] => 4 
      [title] => title4 
      [parent_id] => 3 
     ) 

) 

那麼我們就需要使用PHP函數來使這個HTML輸出：

<table id="1" > 
    <!-- thead for parent_id==0 index --> 
    <thead> 
      <tr> 
       <td width="40%">title1</td> 
       <td width="60%">value1</td> 
      </tr> 
    </thead> 

    <!-- childrens --> 
    <tr> 
     <td>title2</td> 
     <td>value2</td> 
    </tr> 
</table> 


<table id="2" > 
    <!-- thead for parent_id==0 index --> 
    <thead> 
      <tr> 
       <td width="40%">title3</td> 
       <td width="60%">value3</td> 
      </tr> 
    </thead> 

    <!-- childrens --> 
    <tr> 
     <td>title4</td> 
     <td>value4</td> 
    </tr> 
</table> 

誰能幫助我 ？可能這很容易，但我已經嘗試了一切都沒有成功！

財產以後這樣的：

<?php 

    function generateTree($datas, $parent = 0, $limit=0){ 
    if($limit > 1000) return ''; // Make sure not to have an endless recursion 
    $tree = ''; 
    $tree = '<table>'; 
    for($i=0, $ni=count($datas); $i < $ni; $i++){ 
      if($datas[$i]['parent_id'] == $parent){ 
       $tree .= '<tr>'; 
       $tree .= $datas[$i]['title'].'='.$datas[$i]['value']; 
       $tree .= generateTree($datas, $datas[$i]['id'], $limit++); 
       $tree .= '</tr>'; 
      } 
    } 
    $tree .= '</table>'; 
    return $tree; 
    } 

    echo generateTree($myArray); 
?> 

Answer 1

這就是答案

//index elements by id 
foreach ($resutls as $item) { 
     $item['subs'] = array(); 
     $indexedItems[$item['id']] = (object) $item; 
} 

//assign to parent 
$topLevel = array(); 
foreach ($indexedItems as $item) { 
     if ($item->parent_id == 0) { 
      $topLevel[] = $item; 
     } else { 
      $indexedItems[$item->parent_id]->subs[] = $item; 
     } 
} 


//recursive function 
function renderTree($items) {   
$render = ""; 
$i=0; 
foreach ($items as $item) 
    { 
     if(!empty($item->subs)) 
      { 
       $i++; 
       $render .= '<table id="t'.$i.'">'."\n<thead>\n<tr>\n<td width='40%'>" . $item->title."</td>\n<td width='60%'></td>\n</tr>\n</thead>\n"; 
      }else{ 
        $render .= "\n<tr>\n<td>" . $item->title."</td>\n<td>".$item->value."</td>\n</tr>\n"; 
      } 

      if (!empty($item->subs)) 
      { 
       $render .= renderTree($item->subs); 
      } 
      if(!empty($item->subs)) 
      { 
       $render .= "</table>\n\n"; 
      } 
    } 

     return $render; 
    } 

    echo renderTree($topLevel);