PHP Array to List

Question

How do I go from this multidimensional array:

Array (
  [Camden Town] => Array (
    [0] => La Dominican
    [1] => A Lounge
  ), 
  [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...

so many things. This is my last gasp

Mazatec
– Mazatec

2009-11-28 17:16:10 +00:00
Commented Nov 28, 2009 at 17:16 — Mazatec
– Mazatec, Commented Nov 28, 2009 at 17:16

Machado · Accepted Answer · 2016-04-19 19:18:27Z

24

//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.

edited Apr 19, 2016 at 19:18

Machado

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answered Feb 4, 2012 at 18:52

acmol

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2 Comments

Beachhouse Over a year ago

Rockstar code right here. Thanks for saving me the time of building it!

Francisco Presencia Over a year ago

I love that it's recursive

Galen · Accepted Answer · 2009-11-28 17:48:30Z

14

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 =)

answered Nov 28, 2009 at 17:48

Galen

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2 Comments

Mazatec Over a year ago

this is the correct answer. Perfect. Thanks for introducing me to endforeach. this is EXACTLY what I have been looking for.

Dmitry Ginzburg Over a year ago

@Ash you may note, that endforeach is used here for the sense of readability, so the ordinary foreach can be used. See php.net/manual/en/control-structures.alternative-syntax.php

ya.teck · Accepted Answer · 2016-04-19 14:29:11Z

9

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>';
}

edited Apr 19, 2016 at 14:29

answered Jul 6, 2013 at 10:13

ya.teck

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Comments

benmarks · Accepted Answer · 2012-04-06 18:24:52Z

0

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.

edited Apr 6, 2012 at 18:24

benmarks

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answered Nov 28, 2009 at 17:19

Francis Rath

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3 Comments

Ewan Todd Over a year ago

This isn't quite what was requested, but it is probably what was intended. Some CSS will complete the formatting.

Mazatec Over a year ago

actually the above code only provides one "child" for each parent, so for example Camden Town is only given one hotel listed instead of 2.

jason Over a year ago

its recommended to use echo over print in PHP

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