php-elasticaHow can I use the PHP Elastica API to query data?

The PHP Elastica API can be used to query data in an Elasticsearch index. Queries can be constructed using the Search object and the Query object.

Example

<?php

// include the Elastica lib
require_once 'path/to/elastica/lib/Elastica/Autoloader.php';
Elastica\Autoloader::register();

// create an instance of the Elastica client
$client = new Elastica\Client();

// create a search object
$search = new Elastica\Search($client);

// create a query object
$query = new Elastica\Query();

// set the query string
$query->setQueryString('example');

// set the index to search
$search->addIndex('my_index');

// set the type to search
$search->addType('my_type');

// execute the query
$results = $search->search($query);

// print the results
print_r($results);

Output example

Elastica\ResultSet Object
(
    [_results:protected] => Array
        (
            [0] => Elastica\Result Object
                (
                    [_data:protected] => Array
                        (
                            [_index] => my_index
                            [_type] => my_type
                            [_id] => 1
                            [_score] => 1
                            [_source] => Array
                                (
                                    [field1] => value1
                                    [field2] => example
                                    [field3] => value3
                                )

                        )

                )

        )

)

The code above:

• includes the Elastica library (require_once 'path/to/elastica/lib/Elastica/Autoloader.php';)
• creates an instance of the Elastica client ($client = new Elastica\Client();)
• creates a search object ($search = new Elastica\Search($client);)
• creates a query object ($query = new Elastica\Query();)
• sets the query string ($query->setQueryString('example');)
• sets the index to search ($search->addIndex('my_index');)
• sets the type to search ($search->addType('my_type');)
• executes the query ($results = $search->search($query);)
• prints the results (print_r($results);)

Helpful links

• Elasticsearch - PHP Client
• Elastica - PHP Client

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