Wikidata

Wikidata provides a API for searching and retrieving data from wikidata.org.

Installation

composer require freearhey/wikidata

Usage

First we need to create an instance of Wikidata class and save it to some variable, like this:

require_once('vendor/autoload.php');

use Wikidata\Wikidata;

$wikidata = new Wikidata();

after that we can use one of the available methods to access the Wikidata database.

Available Methods

search()

The search() method give you a way to find Wikidata entity by it label.

$results = $wikidata->search($query, $lang, $limit);

Arguments:

• $query: term to search (required)
• $lang: specify the results language (default: 'en')
• $limit: set a custom limit (default: 10)

Example:

$results = $wikidata->search('car', 'fr', 5);

/*
  Collection {
    #items: array:5 [
      0 => SearchResult {
        id: "Q1759802"
        lang: "fr"
        label: "autocar"
        wiki_url: "https://fr.wikipedia.org/wiki/autocar"
        description: "transport routier pouvant accueillir plusieurs voyageurs pour de longues distances"
        aliases: array:1 [
          0 => "car"
        ]
      }
      1 => SearchResult {
        id: "Q224743"
        lang: "fr"
        label: "Car"
        wiki_url: "https://fr.wikipedia.org/wiki/Car"
        description: "page d'homonymie d'un projet Wikimédia"
        aliases: []
      }
      ...
    ]
  }
*/

The search() method always returns Illuminate\Support\Collection class with results. This means you can use all the methods available in Laravel's Collections.

searchBy()

The searchBy help you to find Wikidata entities by it properties value.

$results = $wikidata->searchBy($propId, $entityId, $lang, $limit);

Arguments:

• $propId: id of the property by which to search (required)
• $entityId: id of the entity (required)
• $lang: specify the results language (default: 'en')
• $limit: set a custom limit (default: 10)

Example:

// List of people who born in city Pomona, US
$results = $wikidata->searchBy('P19', 'Q486868');

/*
  Collection {
    #items: array:10 [
      0 => SearchResult {
        id: "Q92638"
        lang: "en"
        label: "Robert Tarjan"
        wiki_url: "https://en.wikipedia.org/wiki/Robert_Tarjan"
        description: "American computer scientist"
        aliases: array:2 [
          0 => "Robert E. Tarjan"
          1 => "Robert Endre Tarjan"
        ]
      }
      1 => SearchResult {
        id: "Q184805"
        lang: "en"
        label: "Tom Waits"
        wiki_url: "https://en.wikipedia.org/wiki/Tom_Waits"
        description: "American singer-songwriter and actor"
        aliases: []
      }
      ...
    ]
  }
*/

The searchBy() method always returns Illuminate\Support\Collection class with results. This means you can use all the methods available in Laravel's Collections.

get()

The get() returns Wikidata entity by specified ID.

$entity = $wikidata->get($entityId, $lang);

Arguments:

• $entityId: id of the entity (required)
• $lang: specify the results language (default: 'en')

Example:

// Get all data about Steve Jobs
$entity = $wikidata->get('Q19837');

/*
  Entity {
    id: "Q19837"
    lang: "en"
    label: "Steve Jobs"
    wiki_url: "https://en.wikipedia.org/wiki/Steve_Jobs"
    aliases: array:2 [
      0 => "Steven Jobs",
      1 => "Steven Paul Jobs"
    ]
    description: "American entrepreneur and co-founder of Apple Inc."
    properties: Collection { ... }
  }
*/


// List of all properties as an array
$properties = $entity->properties->toArray();

/*
  [
    "P1006" => Property {
      id: "P1006"
      label: "NTA ID"
      values: Collection {
        #items: array:6 [
          0 => Value {
            id: "Q5593916"
            label: "Grammy Trustees Award"
            qualifiers: Collection {
              #items: array:1 [
                0 => Qualifier {
                  id: "P585"
                  label: "point in time"
                  value: "2012-01-01T00:00:00Z"
                }
              ]
            }
          },
          ...
        ]
      }
    },
    ...
  ]
 */

Upgrade Guide

Upgrade to 3.2._ from 3.1._

The main changes in the new version have occurred in the way property values are stored. Now each property can have more than one value. In this regard, the attribute value in the Property object was replaced with the attribute values.

Also, values are now presented not as a string, but as an Value object. This allowed us to save along with each value not only its string representation but also a list of its qualifiers. Detailed information on what qualifiers is can be found here.

Testing

vendor/bin/phpunit

Contribution

If you find a bug or want to contribute to the code or documentation, you can help by submitting an issue or a pull request.

License

Wikidata is licensed under the MIT license.