wp-includes/SimplePie/src/SimplePie.php:2777Get the latitude coordinates for the item
string|null public function get_latitude() { if ($return = $this->get_channel_tags(self::NAMESPACE_W3C_BASIC_GEO, 'lat')) { return (float) $return[0]['data']; } elseif (($return = $this->get_channel_tags(self::NAMESPACE_GEORSS, 'point')) && preg_match('/^((?:-)?[0-9]+(?:\.[0-9]+)) ((?:-)?[0-9]+(?:\.[0-9]+))$/', trim($return[0]['data']), $match)) { return (float) $match[1]; } return null; }Introduced in 1.0. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
string|null to float|null.verified against sourcesrc/wp-includes/SimplePie/src/SimplePie.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.