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<?php |
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require_once __DIR__ . '/../vendor/autoload.php'; |
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// Any PSR6 cache can be used. |
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$cache = new Stash\Pool( new \Stash\Driver\FileSystem() ); |
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// @codingStandardsIgnoreStart |
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/** |
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* We want to be able to easily retrieve information |
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* about things that are instances of railway station (Q55488), |
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* so we register a new class that defines its INSTANCE_OF constant. |
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* @link https://www.wikidata.org/wiki/Wikidata:WikiProject_Railways |
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*/ |
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class RailwayStation extends \Samwilson\SimpleWikidata\Item { |
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// @codingStandardsIgnoreEnd |
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/** |
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* Every subclass of Item should define its 'instance of' ID. |
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*/ |
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const INSTANCE_OF = 'Q55488'; |
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/** |
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* It can then contain any type-specific methods that are required. |
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* @return RailwayStation[] |
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*/ |
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public function hasAdjacentStations() { |
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return $this->getPropertyOfTypeItem( 'P197' ); |
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} |
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/** |
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* Including queries. |
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* @return RailwayStation[] |
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*/ |
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public function isAdjacentTo() { |
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$sparql = "SELECT ?item WHERE { ?item wdt:P197 wd:" . $this->getId() . " }"; |
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$query = new \Samwilson\SimpleWikidata\Query( $sparql, $this->lang, $this->cache ); |
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// Each query result will also be a RailwayStation |
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// (if they're correctly recorded as such on Wikidata). |
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return $query->getItems(); |
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} |
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} |
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// Then the class must register itself. |
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RailwayStation::register(); |
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// Then we can create items with the factory and use them. |
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/** @var RailwayStation $eustonStation */ |
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$eustonStation = \Samwilson\SimpleWikidata\Item::factory( 'Q800751', 'en', $cache ); |
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echo $eustonStation->getLabel() |
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. " has " . count( $eustonStation->hasAdjacentStations() ) . " adjacent stations" |
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. " and is adjacent to " . count( $eustonStation->isAdjacentTo() ) . " stations.\n"; |
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samwilson /
simple-wikidata
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