以3列N行显示表中的数据

I'm kinda stuck with this which might seem dumb at the moment.

I have a set of arrays which can have any number of elements can be from 6 to N

I can't modify the structure of the site right now, but it's made with a bootstrap responsive table. i need to display every element in the table but maximum 3 columns with N number of rows.

Like this

I did this in order to get the number of rows

$rows=ceil(count($array)/3);

Then i do a couple of for to display the table in that distribution

for( $i=0; $i<$rows; $i++ ) {
<tr>  
    for($j=0;$j<3;$j++){
      <td>Value</td>
    }
</tr>
}

Until here all fine, problem is i need to access to the array keys from 0 to N and i haven't figured out how

I managed to do it using array_key_exists and a counter.

$key = 0;
for( $i=0; $i<$rows; $i++ ) {
 <tr>  
    for($j=0;$j<3;$j++){
      if ( array_key_exists( $key, $array ) ) {
         <td>echo $array[$key]</td>  // if the index is in the array print the column
      }
    }
 </tr>
}

Try like this:

foreach($array as $val)) {

  echo '<div class="col-md-4">' . $val . '</div>';    

}

If your site "grid" has 12 cols, you can just use classes like col-sm-4, col-md-4 etc. to split your elements into 3 columns. Check the bootstrap manual for more info: http://getbootstrap.com/css/

Not tested but the logic is something like this:

$i = 0;
foreach ($array as $a)
{
    if($i == 0 || $i % 3 == 0)
    {
        if ($i % 3 == 0)
        {
            echo "</tr>";
        }
        echo "<tr>";
    }
    echo "<td>" . $a . "</td>";
    $i++;
}
echo "</tr>";