source/php/Admin/AdminDisplayEvent.php
public function outputMeta($data) {
        $unserialized = @unserialize($data);
        if ($unserialized !== false) {
            return $this->multiImplode($unserialized, ', ');
        } else {
            return $data;
        }
    }
public function outputMeta($data) {
        $unserialized = @unserialize($data);
        if ($unserialized !== false) {
            return $this->multiImplode($unserialized, ', ');
        } else {
            return $data;
        }
    }
Unserialize and implode arrays
@param  mixed $data data to be formatted
@return string