为什么我的表被渲染为空?

时间:2014-01-20 23:37:14

标签: php mysql pdo render

我正在编写一些从数据库呈现表格的php,这应该很简单,但由于某种原因,它会渲染额外的单元格而且所有单元格都是空的。这是我的代码:

<?php
    $db= new PDO("mysql:host=localhost;dbname=mydb", "user", "password");
    $query= $db->query("SELECT yarnId, yarnName, longYarnDescription, sale_price, cost, contents, onSale, yarnImage, activeFlag FROM yarn"); 
    $result= $query->fetchAll();
?>
<table border="1">
   <tr>
    <th>yarnId</th>
    <th>yarnName</th>
    <th>description</th>
    <th>sale price</th>
    <th>cost</th>
    <th>contents</th>
    <th>onSale</th>
    <th>yarnImage</th>
    <th>activeFlag</th>
    <th>edit</th>
   </tr>
   <?php for($r=0; $r<count($result); $r++){?>
    <tr>
        <?php for($c=0; $c<count($result[0]); $c++){?>
            <td><?php echo $result[r][c];?></td>
        <?php }?>
        <td><button name=edit>edit</button></td>
    </tr>
   <?php }?>
</table> 

如果有人能告诉我为什么它是空的以及为什么有额外的细胞,我们将不胜感激。

1 个答案:

答案 0 :(得分:0)

以下代码使用while()循环代替for()

<table border="1">
   <tr>
    <th>yarnId</th>
    <th>yarnName</th>
    <th>description</th>
    <th>sale price</th>
    <th>cost</th>
    <th>contents</th>
    <th>onSale</th>
    <th>yarnImage</th>
    <th>activeFlag</th>
    <th>edit</th>
   </tr>
<?php 
while($row = $query->fetch()) { 
    echo "<tr>"; 
    for ($x=0;$x<= 8; $x++)  {
        echo "<td>" . $row[$x] . "</td>";
    }
    echo "<td><button name=\"edit\">edit</button></td></tr>\n";
}
?>
</table>