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| <?php | |
| /** | |
| * Consuming Linked Data from Wikidata. | |
| * | |
| * This example demonstrates fetching information about villages in Fife | |
| * from Wikidata. The list of villages is fetched by running a SPARQL query. | |
| * | |
| * If you click on an village, then it fetched by getting the Turtle formatted | |
| * RDF from Wikidata for that village. It then parses the result and | |
| * displays a page about that village with a title, synopsis and Open Street Map. | |
| * | |
| * @package EasyRdf | |
| * @copyright Copyright (c) 2009-2020 Nicholas J Humfrey | |
| * @license http://unlicense.org/ | |
| */ | |
| require_once realpath(__DIR__.'/..')."/vendor/autoload.php"; | |
| require_once __DIR__."/html_tag_helpers.php"; | |
| // Setup some additional prefixes for Wikidata | |
| \EasyRdf\RdfNamespace::set('wd', 'http://www.wikidata.org/entity/'); | |
| \EasyRdf\RdfNamespace::set('wds', 'http://www.wikidata.org/entity/statement/'); | |
| \EasyRdf\RdfNamespace::set('wdt', 'http://www.wikidata.org/prop/direct/'); | |
| \EasyRdf\RdfNamespace::set('p', 'http://www.wikidata.org/prop/'); | |
| \EasyRdf\RdfNamespace::set('wikibase', 'http://wikiba.se/ontology#'); | |
| // SPARQL Query to get a list of villages in Fife | |
| $SPARQL_QUERY = ' | |
| SELECT ?item ?itemLabel | |
| WHERE { | |
| ?item wdt:P31 wd:Q532 . # Instance of Village | |
| ?item wdt:P131 wd:Q201149 . # Located in Fife | |
| SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". } | |
| } | |
| ORDER BY ?itemLabel | |
| '; | |
| $SPARQL_ENDPOINT = 'https://query.wikidata.org/sparql'; | |
| $WIKIDATA_IMAGE = 'wdt:P18'; | |
| $WIKIDATA_POINT = 'wdt:P625'; | |
| ?> | |
| <html> | |
| <head><title>EasyRdf Village Info Example</title></head> | |
| <body> | |
| <h1>EasyRdf Village Info Example</h1> | |
| <?php | |
| if (isset($_REQUEST['id'])) { | |
| $id = $_REQUEST['id']; | |
| $graph = \EasyRdf\Graph::newAndLoad("wd:$id", 'turtle'); | |
| $village = $graph->resource("wd:$id"); | |
| if ($village->get($WIKIDATA_IMAGE)) { | |
| print image_tag( | |
| $village->get($WIKIDATA_IMAGE), | |
| array('style'=>'max-width:400px;max-height:250px;margin:10px;float:right') | |
| ); | |
| } | |
| print content_tag('h2',$village->label('en')); | |
| print content_tag('p', $village->get('schema:description', null, 'en')); | |
| if (preg_match("/Point\((\S+) (\S+)\)/", $village->get($WIKIDATA_POINT), $matches)) { | |
| $long = $matches[1]; | |
| $lat = $matches[2]; | |
| print "<iframe width='420' height='350' frameborder='0' scrolling='no' marginheight='0' marginwidth='0' src='http://www.openlinkmap.org/small.php?lat=$lat&lon=$long&zoom=14' style='border: 1px solid black'></iframe>"; | |
| } | |
| print content_tag('h3', "Pages about " . $village->label('en')); | |
| print "<ul>\n"; | |
| foreach ($graph->all($village, "^schema:about") as $doc) { | |
| print '<li>'.link_to($doc)."</li>\n"; | |
| } | |
| print "</ul>\n"; | |
| echo "<br /><br />"; | |
| echo $village->dump(); | |
| } else { | |
| print "<p>List of villages in Fife.</p>"; | |
| $sparql = new \EasyRdf\Sparql\Client($SPARQL_ENDPOINT); | |
| $results = $sparql->query($SPARQL_QUERY); | |
| print "<ul>\n"; | |
| foreach ($results as $row) { | |
| if (preg_match("|/(Q\d+)|", $row->item, $matches)) { | |
| print '<li>'.link_to_self($row->itemLabel, "id=".$matches[1])."</li>\n"; | |
| } | |
| } | |
| print "</ul>\n"; | |
| } | |
| ?> | |
| </body> | |
| </html> |