"where" filter

[cdsaenz]

I saw in Jekyll (I'm writing a small PHP SSG inspired in it, thanks to this project) and other .liquid implementations that there's a filter called where useful to filter out an array of data. Apparently in a recent version, Jekyll also added it as a filter in a for iteration (but I didn't see it in Shopify's version).

I didn't see it in php-liquid, so here's my initial take on this filter. Tried it on a single level array, need to check it out for multidimensional cases.

Note: if available under another name in the project, please disregard. Thanks!

{% assign developers = team | where: "job","Developer" %}

  /**
   * Where filter
   */
   public function where($array,$field,$value) {

        $r = array_filter($array, function($v, $k) use ($field,$value) {
                if (is_array($v)) {
                    return (isset($v[$field]) && $v[$field] == $value);
                } else {
                    return true;
                }
            }, ARRAY_FILTER_USE_BOTH);

        return $r;
   }