Removing duplicates in an array having Apache_Solr_Document object in PHP - php

Question

Updated: I have two separate arrays which hold some data returned from search() function of SolrPhpClient. The arrays contain data in form of Apache_Sole_Document objects. These objects in turn contain the actual fields and values. I merge these two arrays to get a single array holding all items using array_merge() of PHP
The array will have some duplicate items which needs to be removed.
I am not sure how to achieve it in this structure.
The array structure is as such:
Array ( [0] => Apache_Solr_Document Object (
[_documentBoost:protected] =>
[_fields:protected] => Array ( [id] => 111 [name] => ABCD )
[_fieldBoosts:protected] => Array ( [id] => [name] => )
)
[1] => Apache_Solr_Document Object (
[_documentBoost:protected] =>
[_fields:protected] => Array ( [id] => 222 [name] => DEFG )
[_fieldBoosts:protected] => Array ( [id] => [name] => )
)
[2] => Apache_Solr_Document Object (
[_documentBoost:protected] =>
[_fields:protected] => Array ( [id] => 333 [name] => LMNO )
[_fieldBoosts:protected] => Array ( [id] => [name] => )
)
[3] => Apache_Solr_Document Object (
[_documentBoost:protected] =>
[_fields:protected] => Array ( [id] => 111 [name] => ABCD )
[_fieldBoosts:protected] => Array ( [id] => [name] => )
)
[4] => Apache_Solr_Document Object (
[_documentBoost:protected] =>
[_fields:protected] => Array ( [id] => 444 [name] => PQRS )
[_fieldBoosts:protected] => Array ( [id] => [name] => )
)
[5] => Apache_Solr_Document Object (
[_documentBoost:protected] =>
[_fields:protected] => Array ( [id] => 222 [name] => DEFG )
[_fieldBoosts:protected] => Array ( [id] => [name] => )
)
)
As you can see there is a [id] field and a [name] field.
I would like to remove duplicates from the array comparing the [id] field.
The final array after removing duplicates should look like this:
Array ( [0] => Apache_Solr_Document Object (
[_documentBoost:protected] =>
[_fields:protected] => Array ( [id] => 111 [name] => ABCD )
[_fieldBoosts:protected] => Array ( [id] => [name] => )
)
[1] => Apache_Solr_Document Object (
[_documentBoost:protected] =>
[_fields:protected] => Array ( [id] => 222 [name] => DEFG )
[_fieldBoosts:protected] => Array ( [id] => [name] => )
)
[2] => Apache_Solr_Document Object (
[_documentBoost:protected] =>
[_fields:protected] => Array ( [id] => 333 [name] => LMNO )
[_fieldBoosts:protected] => Array ( [id] => [name] => )
)
[3] => Apache_Solr_Document Object (
[_documentBoost:protected] =>
[_fields:protected] => Array ( [id] => 444 [name] => PQRS )
[_fieldBoosts:protected] => Array ( [id] => [name] => )
)
)
How can I achieve this? somebody please help!

Answer 1

I guess you could iterate over the array and remove the duplicates, but that doesn't seem like a neat solution to me.
I'm not familiar with the SolrPhpClient, but Solr does support grouping on fields. You can group on the id by adding this part to your request:
group=true&group.field=id
The documents returned will be grouped on the id. For more details check this page.
Update:
I looked at the SolrPhpClient documentation and see that you can add additional parameters to your request like this:
$additionalParameters = array(
'fq' => 'a filtering query',
'facet' => 'true',
'facet.field' => array(
'field_1',
'field_2'
)
);
$results = $solr->search($query, $start, $rows, $additionalParameters);
I assume you can add the grouping parameters to this:
$additionalParameters = array(
'group' => 'true',
'group.field' => 'id'
)
);
$results = $solr->search($query, $start, $rows, $additionalParameters);
For more details on this, check this page