PHP nested array into HTML list

Question

Trying to get to grips with PHP, but I have absolutely no idea how to do this.

I want to take this array:

$things = array('vehicle' => array('car' => array('hatchback', 'saloon'),'van','lorry'),
                'person' => array('male', 'female'),
                'matter' => array('solid', 'liquid', 'gas'),
            );

and turn it into this into something like this in HTML:

Vehicle
- Car
  - Hatchback
  - Saloon
- Van
- Lorry
Person
- Male
- Female
Matter
- Solid
- Liquid
- Gas

Tried a number of solutions from searching, but cannot get anything to work at all.

possible duplicate of Multidimensional array to HTML unordered list — user3189338
– user3189338, Commented Jan 5, 2015 at 20:08

Richard Christensen · Accepted Answer · 2015-01-05 20:12:01Z

3

What you are looking for is called Recursion. Below is a recursive function that calls itself if the value of the array key is also an array.

function printArrayList($array)
{
    echo "<ul>";

    foreach($array as $k => $v) {
        if (is_array($v)) {
            echo "<li>" . $k . "</li>";
            printArrayList($v);
            continue;
        }

        echo "<li>" . $v . "</li>";
    }

    echo "</ul>";
}

answered Jan 5, 2015 at 20:12

Richard Christensen

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4 Comments

Will Busby Over a year ago

I'll try my best to implement it. Thank you for the help, much appreciated.

Will Busby Over a year ago

Update: This worked straight away, thank you so much!

Richard Christensen Over a year ago

This should also work for arrays that contain both arrays and static values. i.e. array("foo"=>array("a","b"),"bar","baz");

Will Busby Over a year ago

That's great! Thanks again. I can't upvote because my reputation is still low, but I accepted the answer.

Community · Accepted Answer · 2017-05-23 11:52:37Z

0

Try something like:

<?php
function ToUl($input){
   echo "<ul>";

   $oldvalue = null;
   foreach($input as $value){
     if($oldvalue != null && !is_array($value))
        echo "</li>";
     if(is_array($value)){
        ToUl($value);
     }else
        echo "<li>" + $value;
      $oldvalue = $value;
    }

    if($oldvalue != null)
      echo "</li>";

   echo "</ul>";
}
?>

Code source: Multidimensional array to HTML unordered list

edited May 23, 2017 at 11:52

CommunityBot

11 silver badge

answered Jan 5, 2015 at 20:11

user3189338

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