Twig iterate over object properties

You can first cast the object to array. You can build own filter casting your object to array. More about filters is available here: http://twig.sensiolabs.org/doc/advanced.html#filters

It could then look like that:

{% for key, value in my_object|cast_to_array %}

To complete Tadeck's answer here is how:

If you have not ever created or setup a Twig extension (filter), you will need to follow this instruction first http://symfony.com/doc/2.7/cookbook/templating/twig_extension.html

1) add to your AppBundle/Twig/AppExtension.php ('cast_to_array')

public function getFilters()
{
    return array(
        new \Twig_SimpleFilter('md2html', array($this, 'markdownToHtml'), array('is_safe' => array('html'))),
        new \Twig_SimpleFilter('price', array($this, 'priceFilter')),
        new \Twig_SimpleFilter('cast_to_array', array($this, 'objectFilter')),
    );
}

2) add to your AppBundle/Twig/AppExtension.php

public function objectFilter($stdClassObject) {
    // Just typecast it to an array
    $response = (array)$stdClassObject;

    return $response;
}

3) In your example.html.twig loop thru with twig and the filter.

{% for key, value in row|cast_to_array %}
       <td id="col" class="hidden-xs">{{ value }}</td>
{% endfor %}

Done, I hope it helps. From Tadeck's pointer.

After loading TWIG, add this filter:

$twig->addFilter( new Twig_SimpleFilter('cast_to_array', function ($stdClassObject) {
    $response = array();
    foreach ($stdClassObject as $key => $value) {
        $response[] = array($key, $value);
    }
    return $response;
}));

It's named cast_to_array after Tadeck's suggestion. :) I'm sure it doesn't work for any kind of stdClass Object, but it sure solved my problem with printing PHP associative arrays :) Use it as follows:

{% for key, value in my_object|cast_to_array %}
    <td>{{ value.1 }}</td>
{% endfor %}

Side story

Since I got into this SO page a lot, I think it's pertinent to show where I'm using Twig for iterating over object properties, so it's helpful for other people with the same problem: I was trying to print a table from a .json source, but PHP's json_decode transforms any "key" : "value" into a PHP associative array, which Twig doesn't print by default. So this filter cuts and delivers a regular array to be used by Twig.

source.json

{
    "user": {
        "family": {
            "table": [{
                "First_Name": "John",
                "Last_Name": "Foo",
                "Age": 25,
                "Role": "Brother"
            }, {
                "First_Name": "Mary",
                "Last_Name": "Bar",
                "Age": 14,
                "Role": "Sister"
            }, {
                "First_Name": "Joe",
                "Last_Name": "Baz",
                "Age": 33,
                "Role": "Uncle"
            }]
        }
    }
}

Twig

<table>
  <thead>
    <tr> {# get table headers from the table row #}
      {% for row in user.family.table.0|cast_to_array %}
        <th>{{ row.0 | replace({'_': ' '}) }}</th>
      {% endfor %}
    </tr>
  </thead>
  <tbody>
    {% for row in user.family.table %}
      <tr>
      {% for key, value in row|cast_to_array %}
        <td>{{ value.1 }}</td>
      {% endfor %}
      </tr>
    {% endfor %}
  </tbody>
</table>

I know this is old but, wouldn't

$assoc_array = json_decode(json_encode($stdClassObject), TRUE);

work just as well?