iterate a html table of two row and 3 column using one php query

问题

I have a database table and that table has 6 rows. What I want is to display that 6 rows in a html page using a 3 column and 2 row table.

I know how to work with php arrays and while loops. My problem is how to limit the array to put 3 items in the first row and put the other 3 in the next row.

this is what i have tried but didn't work

<div id="maincontent">
  <!-- class one -->
      <?php 
        $getSection = getSection();
        $i=0;
        while($allSection = mysql_fetch_array($getSection)){
      ?>
      <div class="subconent">
<table width="937" border="0">
  <tr>
    <td>
        <div class="sub_image">
            <a href="section.php?id=<?php echo urlencode($allSection['id']); ?>"><img src="admin/uploads/fron_sect/<?php echo $allSection['image']; ?>" width="134" height="120" border="0" alt="HNA" class="PopBoxImageLink"  onmouseover="PopEx(this,-50,-25,205,186,20,null);" onclick="window.location='http://localhost/hants/section.php?id=<?php echo urlencode($allSection['id']); ?>'" /></a>
        </div>
            <div class="cont_txt">
              <h3><?php echo $allSection['name_full']; ?></h3>
                <p><?php echo substr($allSection['description'],0,140) . ""; ?></p>
                <br />
              <a href="section.php?id=<?php echo urlencode($allSection['id']); $i++; ?>"><img src="images/read_more.jpg" alt="Read More" width="89" height="25" border="0" /></a>
            </div>
    </td>
  </tr>
</table>
</div>
<?php 
if($i==4) { ?>
<table width="937" border="0">
<tr>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td></tr>
<tr><div class="sub_image">
            <a href="section.php?id=<?php echo urlencode($allSection['id']); ?>"><img src="admin/uploads/fron_sect/<?php echo $allSection['image']; ?>" width="134" height="120" border="0" alt="HNA" class="PopBoxImageLink"  onmouseover="PopEx(this,-50,-25,205,186,20,null);" onclick="window.location='http://localhost/hants/section.php?id=<?php echo urlencode($allSection['id']); ?>'" /></a>
        </div>
            <div class="cont_txt">
              <h3><?php echo $allSection['name_full']; ?></h3>
                <p><?php echo substr($allSection['description'],0,140) . ""; ?></p>
                <br />
              <a href="section.php?id=<?php echo urlencode($allSection['id']); ?>"><img src="images/read_more.jpg" alt="Read More" width="89" height="25" border="0" /></a>
            </div><td>
<?php   }
} ?>
  </div>

回答1:

Use modulo operator (%):

http://www.devchunks.com/web-development/using-the-php-modulus-operator/

something like this:

<table>

<?php

$i = 0;
while ( $row = mysql_fetch_array($result) ){
    if ($i % 3 == 0){
        echo '<tr>';
    }
    echo '<td>'.$row['column_name'].'</td>';
    if ($i % 3 == 2){
        echo '</tr>';
    }
    $i++; 
}

//here is a check in case you don't have multiple of 3 rows
if ($i % 3 != 0){
    echo '</tr>';
}

?>

</table>

回答2:

At its base, you'll need something like this:

<table>
<tr>

<?

$count = 0;
foreach ($row) {
    echo "<td>" . $row["value"] ."</td>";
    $count++;

    if (($count % 3) == 0) && ($count > 0) {
        echo ("</tr><tr>");
    }
}

?>

</tr>
</table>

Start printing out the header of your table, and then begin iterating through the dataset. Keep track of how many you've printed out, and if this is the third one, print the HTML to finish this row and start the next one. (I've used %, so it'll wrap on every third entry, not just the first one)

回答3:

Well, you could correctly fetch those informations in your sql-query ( just one example that could fit http://en.wikibooks.org/wiki/MySQL/Pivot_table ).

Or simply fetch everything into PHP arrays.

Oldschool: mysql_query() and while( $row = mysql_fetch_array() ) Newchool: PDO ( http://de.php.net/manual/en/book.pdo.php )

回答4:

Awesome! Thanks a lot. It works for me, Zend. You can try something like this.

   <table width="1024px" border="0" cellspacing="2" cellpadding="2">  
  <?php
      $i = 0;
      foreach ($this->rows as $row )
      {
          $img = IMAGE_PATH . '/' . 'gallery/' . $row->gly_thumbnail;
          if ($i % 3 == 0)
          {
              echo '<tr>';
          }
  ?>
  <td align="center">
    <img src="<?php echo $img; ?>" width="300" height="215"><br/>
    <?php echo $row->gly_title; ?>
  </td>
  <?php        
          if ($i % 3 == 2)
          {
              echo '</tr>';
          }
          $i++; 
      }

      //here is a check in case you don't have multiple of 3 rows
      if ($i % 3 != 0)
      {
          echo '</tr>';
      }

  ?>
</table>

来源：https://stackoverflow.com/questions/12146424/iterate-a-html-table-of-two-row-and-3-column-using-one-php-query