Convert 3D array into a HTML table - php

Question

ARRAY
$array['1'] = null;
$array['2']['21'] = null;
$array['3']['31'] = null;
$array['3']['32'] = null;
$array['4']['41'] = null;
$array['4']['42']['421'] = null;
$array['4']['42']['422'] = null;
$array['5']['51'] = null;
$array['5']['52'] = null;
$array['5']['53']['531'] = null;
$array['5']['53']['532'] = null;
$array['5']['53']['533'] = null;
$array['6']['61']['611'] = null;
$array['6']['62'] = null;
$array['6']['63']['631'] = null;
$array['6']['63']['632'] = null;
$array['6']['63']['633'] = null;
$array['6']['63']['634'] = null;
$array['7']['71']['711'] = null;
$array['8']['81']['811'] = null;
$array['8']['81']['812'] = null;
$array['9']['91']['911'] = null;
$array['9']['91']['912'] = null;
$array['9']['92']['921'] = null;
$array['9']['92']['922'] = null;
I'm trying to convert array above into a HTML table. I need to add rowspan to get output like shown as image below but run out of juice.
PHP
//If condition is satistied
if (isset($array) && count($array) > 0)
{
//echo '<pre>'; print_r($array); exit;
//Initiate variables
$row = null;
$level_one_array = $array;
//Iterate through menu level one
foreach ($level_one_array as $level_one_name => $level_two_array)
{
//If level two is an array
if (is_array($level_two_array))
{
//Iterate through menu level two
foreach ($level_two_array as $level_two_name => $level_three_array)
{
//If level two is an array
if (is_array($level_three_array))
{
//Iterate through menu level three
foreach ($level_three_array as $level_three_name => $null)
{
$row .= '<tr>';
$row .= '<td class="td_data">' . $level_one_name . '</td>';
$row .= '<td class="td_data">' . $level_two_name . '</td>';
$row .= '<td class="td_data">' . $level_three_name . '</td>';
$row .= '</tr>';
}
}
//If level two is not an array
else
{
$row .= '<tr>';
$row .= '<td class="td_data">' . $level_one_name . '</td>';
$row .= '<td class="td_data">' . $level_two_name . '</td>';
$row .= '<td class="td_data"> </td>';
$row .= '</tr>';
}
}
}
//If level two is not an array
else
{
$row .= '<tr>';
$row .= '<td class="td_data">' . $level_one_name . '</td>';
$row .= '<td class="td_data"> </td>';
$row .= '<td class="td_data"> </td>';
$row .= '</tr>';
}
}
$table = '<table>';
$table .= '<tr><td class="td_title">Menus</td><td class="td_title">Submenus/Items</td><td class="td_title">Items</td></tr>';
$table .= $row;
$table .= '</table>';
echo $table;
}
else
{
echo '<center>No record found</center>';
}
WHAT I NEED IS THIS:

Answer 1

I wrote new code that will do the trick. Working with rowspan is very tricky. The key elements are calculate_rowspan() and the flag $on_level_X_row to determine whether or not it is necessary to add <tr>.
It was necessary to detach the output from the most inner foreach because you have to handle multiple rows with it. Also I added "\n" after each </tr> to make the output a little more human readable.
function calculate_rowspan($array)
{
if (!is_array($array) || count($array) == 0)
return 1;
$rowspan = 0;
foreach ($array as $key=>$value)
{
$rowspan++;
if (is_array($value) && count($value) > 0)
{
$rowspan += count($value);
// -1 because first element is one same row
$rowspan--;
}
}
return $rowspan;
}
if (is_array($array) && count($array) > 0)
{
$output = '';
foreach ($array as $level_one_name => $level_two_array)
{
if (!is_array($level_two_array) || count($level_two_array) == 0)
{
$output .= '<tr><td>';
$output .= $level_one_name;
$output .= '</td><td></td><td></td></tr>'."\n";
}
else
{
$output .= '<tr>';
$output .= '<td rowspan="'.calculate_rowspan($level_two_array).'">';
$output .= $level_one_name;
$output .= '</td>';
$on_level_one_row = TRUE;
foreach ($level_two_array as $level_two_name => $level_three_array)
{
if ( ! $on_level_one_row)
$output .= '<tr>';
else
$on_level_one_row = FALSE;
if (!is_array($level_three_array) || count($level_three_array) == 0)
{
$output .= '<td>';
$output .= $level_two_name;
$output .= '</td><td></td></tr>'."\n";
}
else
{
$output .= '<td rowspan="'.calculate_rowspan($level_three_array).'">';
$output .= $level_two_name;
$output .= '</td>';
$on_level_two_row = TRUE;
foreach ($level_three_array as $level_three_name => $null)
{
if ( ! $on_level_two_row)
$output .= '<tr>';
else
$on_level_two_row = FALSE;
$output .= '<td>';
$output .= $level_three_name;
$output .= '</td></tr>'."\n";
}
}
}
}
}
print '<table>'."\n";
print $output;
print '</table>';
}