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<?php

namespace swag;

/**
 * Array utilities.
 */
class ArrayUtil {

    /**
     * Flatten an array.
     */
    public static function flattenArray($a) {
        if (is_array($a) && !$a)
            return array();

        if (!is_array($a))
            $a=array($a);

        $res=array();

        foreach ($a as $item) {
            if (is_array($item))
                $res=array_merge($res,$item);

            else
                $res[]=$item;
        }

        return $res;
    }
}