DB::prepare_simplepie_object_for_cache( SimplePie\SimplePie $data ): SimplePie\Cache\array{string,

Description

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$dataSimplePie\SimplePie

Return value

SimplePie\Cache\array{string,

array<string, Item>} First item is the serialized data for storage, second item is the unique ID for this item

Performance profile

How much work a call to DB::prepare_simplepie_object_for_cache() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Light

Touches nothing outside its own arguments.

Scaling

Scales with input

The body loops, so the work grows with what you pass in.

Instructions

14–128

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 164.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

• serializeserialisationserialize()called directly

What one call costs · 1 distinct outcome

One number would be a lie: the work depends on which branch runs. These are every distinct cost DB::prepare_simplepie_object_for_cache() can have, taken from its control-flow graph on PHP 8.5.

Source code

View on Trac ↗View on GitHub ↗

27    protected static function prepare_simplepie_object_for_cache(\SimplePie\SimplePie $data)28    {29        $items = $data->get_items();30        $items_by_id = [];31 32        if (!empty($items)) {33            foreach ($items as $item) {34                $items_by_id[$item->get_id()] = $item;35            }36 37            if (count($items_by_id) !== count($items)) {38                $items_by_id = [];39                foreach ($items as $item) {40                    $items_by_id[$item->get_id(true)] = $item;41                }42            }43 44            if (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0])) {45                $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0];46            } elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0])) {47                $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0];48            } elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0])) {49                $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0];50            } elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0]['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['channel'][0])) {51                $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0]['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['channel'][0];52            } else {53                $channel = null;54            }55 56            if ($channel !== null) {57                if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry'])) {58                    unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry']);59                }60                if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['entry'])) {61                    unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['entry']);62                }63                if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_10]['item'])) {64                    unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_10]['item']);65                }66                if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_090]['item'])) {67                    unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_090]['item']);68                }69                if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['item'])) {70                    unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['item']);71                }72            }73            if (isset($data->data['items'])) {74                unset($data->data['items']);75            }76            if (isset($data->data['ordered_items'])) {77                unset($data->data['ordered_items']);78            }79        }80        return [serialize($data->data), $items_by_id];81    }

Changelog

One change between 6.7.7 and 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/SimplePie/src/Cache/DB.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

Something wrong on this page? Report it and it gets fixed in the next regeneration.