Item::get_date( string $date_format = 'j F Y, g:i a' ): int|string|null

649    public function get_date($date_format = 'j F Y, g:i a')650    {651        if (!isset($this->data['date'])) {652            if ($return = $this->get_item_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'published')) {653                $this->data['date']['raw'] = $return[0]['data'];654            } elseif ($return = $this->get_item_tags(\SimplePie\SimplePie::NAMESPACE_RSS_20, 'pubDate')) {655                $this->data['date']['raw'] = $return[0]['data'];656            } elseif ($return = $this->get_item_tags(\SimplePie\SimplePie::NAMESPACE_DC_11, 'date')) {657                $this->data['date']['raw'] = $return[0]['data'];658            } elseif ($return = $this->get_item_tags(\SimplePie\SimplePie::NAMESPACE_DC_10, 'date')) {659                $this->data['date']['raw'] = $return[0]['data'];660            } elseif ($return = $this->get_item_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'updated')) {661                $this->data['date']['raw'] = $return[0]['data'];662            } elseif ($return = $this->get_item_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_03, 'issued')) {663                $this->data['date']['raw'] = $return[0]['data'];664            } elseif ($return = $this->get_item_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_03, 'created')) {665                $this->data['date']['raw'] = $return[0]['data'];666            } elseif ($return = $this->get_item_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_03, 'modified')) {667                $this->data['date']['raw'] = $return[0]['data'];668            }669 670            if (!empty($this->data['date']['raw'])) {671                $parser = $this->registry->call(Parse\Date::class, 'get');672                $this->data['date']['parsed'] = $parser->parse($this->data['date']['raw']) ?: null;673            } else {674                $this->data['date'] = null;675            }676        }677        if ($this->data['date']) {678            $date_format = (string) $date_format;679            switch ($date_format) {680                case '':681                    return $this->sanitize($this->data['date']['raw'], \SimplePie\SimplePie::CONSTRUCT_TEXT);682 683                case 'U':684                    return $this->data['date']['parsed'];685 686                default:687                    return date($date_format, $this->data['date']['parsed']);688            }689        }690 691        return null;692    }