PHP Array to List

How do I go from this multidimensional array:

Array (
  [Camden Town] => Array (
    [0] => La Dominican
    [1] => A Lounge
开发者_Python百科  ), 
  [Coastal] => Array (
    [0] => Royal Hotel
  ), 
  [Como] => Array (
    [0] => Casa Producto 
    [1] => Casa Wow
  ), 
  [Florence] => Array (
    [0] => Florenciana Hotel
  )
)

to this:

<ul>
  <li>Camden Town</li>
  <ul>
    <li>La Dominican</li>
    <li>A Lounge</li>
  </ul>
  <li>Coastal</li>
  <ul>
    <li>Royal Hotel</li>
  </ul>
  ...
</ul>

above is in html...

//code by acmol
function array2ul($array) {
    $out = "<ul>";
    foreach($array as $key => $elem){
        if(!is_array($elem)){
                $out .= "<li><span>$key:[$elem]</span></li>";
        }
        else $out .= "<li><span>$key</span>".array2ul($elem)."</li>";
    }
    $out .= "</ul>";
    return $out; 
}

I think you are looking for this.

Here's a much more maintainable way to do it than to echo html...

<ul>
    <?php foreach( $array as $city => $hotels ): ?>
    <li><?= $city ?>
        <ul>
            <?php foreach( $hotels as $hotel ): ?>
            <li><?= $hotel ?></li>
            <?php endforeach; ?>
        </ul>
    </li>
    <?php endforeach; ?>
</ul>

Here's another way using h2s for the cities and not nested lists

<?php foreach( $array as $city => $hotels ): ?>
<h2><?= $city ?></h2>
    <ul>
        <?php foreach( $hotels as $hotel ): ?>
        <li><?= $hotel ?></li>
        <?php endforeach; ?>
    </ul>
<?php endforeach; ?>

The outputted html isn't in the prettiest format but you can fix that. It's all about whether you want pretty html or easier to read code. I'm all for easier to read code =)

Refactored acmol's funciton

/**
 * Converts a multi-level array to UL list.
 */
function array2ul($array) {
  $output = '<ul>';
  foreach ($array as $key => $value) {
    $function = is_array($value) ? __FUNCTION__ : 'htmlspecialchars';
    $output .= '<li><b>' . $key . ':</b> <i>' . $function($value) . '</i></li>';
  }
  return $output . '</ul>';
}

Assume your data is in $array.

echo '<ul>';
foreach ($array as $city => $hotels)
{
    echo "<li>$city</li>\n<ul>\n";
    foreach ($hotels as $hotel)
    {
        echo "    <li>$hotel</li>\n";
    }
    echo "</ul>\n\n";
}
echo '</ul>';

Haven't tested it, but I'm pretty sure it's right.