SimplePie::get_items( int $start = 0, int $end = 0 ): SimplePie\Item[]|null

2991    public function get_items($start = 0, $end = 0)2992    {2993        if (!isset($this->data['items'])) {2994            if (!empty($this->multifeed_objects)) {2995                $this->data['items'] = SimplePie::merge_items($this->multifeed_objects, $start, $end, $this->item_limit);2996                if (empty($this->data['items'])) {2997                    return [];2998                }2999                return $this->data['items'];3000            }3001            $this->data['items'] = [];3002            if ($items = $this->get_feed_tags(self::NAMESPACE_ATOM_10, 'entry')) {3003                $keys = array_keys($items);3004                foreach ($keys as $key) {3005                    $this->data['items'][] = $this->registry->create(Item::class, [$this, $items[$key]]);3006                }3007            }3008            if ($items = $this->get_feed_tags(self::NAMESPACE_ATOM_03, 'entry')) {3009                $keys = array_keys($items);3010                foreach ($keys as $key) {3011                    $this->data['items'][] = $this->registry->create(Item::class, [$this, $items[$key]]);3012                }3013            }3014            if ($items = $this->get_feed_tags(self::NAMESPACE_RSS_10, 'item')) {3015                $keys = array_keys($items);3016                foreach ($keys as $key) {3017                    $this->data['items'][] = $this->registry->create(Item::class, [$this, $items[$key]]);3018                }3019            }3020            if ($items = $this->get_feed_tags(self::NAMESPACE_RSS_090, 'item')) {3021                $keys = array_keys($items);3022                foreach ($keys as $key) {3023                    $this->data['items'][] = $this->registry->create(Item::class, [$this, $items[$key]]);3024                }3025            }3026            if ($items = $this->get_channel_tags(self::NAMESPACE_RSS_20, 'item')) {3027                $keys = array_keys($items);3028                foreach ($keys as $key) {3029                    $this->data['items'][] = $this->registry->create(Item::class, [$this, $items[$key]]);3030                }3031            }3032        }3033 3034        if (empty($this->data['items'])) {3035            return [];3036        }3037 3038        if ($this->order_by_date) {3039            if (!isset($this->data['ordered_items'])) {3040                $this->data['ordered_items'] = $this->data['items'];3041                usort($this->data['ordered_items'], [get_class($this), 'sort_items']);3042            }3043            $items = $this->data['ordered_items'];3044        } else {3045            $items = $this->data['items'];3046        }3047        // Slice the data as desired3048        if ($end === 0) {3049            return array_slice($items, $start);3050        }3051 3052        return array_slice($items, $start, $end);3053    }