Added extract example, first working version. Still needs more work though

examples/2.7-extract-query.php

+<?php
+
+require(__DIR__.'/init.php');
+htmlHeader();
+
+// create a client instance
+$client = new Solarium\Client($config);
+$client->setAdapter('Solarium\Core\Client\Adapter\ZendHttp');
+
+// get an extract query instance and add settings
+$query = $client->createExtract();
+$query->addFieldMapping('content', 'text');
+$query->setUprefix('attr_');
+$query->setFile(__DIR__.'/index.html');
+$query->setCommit(true);
+$query->setOmitHeader(false);
+
+// add document
+$doc = $query->createDocument();
+$doc->id = time();
+$doc->some = 'more fields';
+$query->setDocument($doc);
+
+// this executes the query and returns the result
+$result = $client->extract($query);
+
+echo '<b>Extract query executed</b><br/>';
+echo 'Query status: ' . $result->getStatus(). '<br/>';
+echo 'Query time: ' . $result->getQueryTime();
+
+htmlFooter();
\ No newline at end of file

examples/index.html

@@ -85,6 +85,7 @@
                 <li><a href="2.5-terms-query.php">2.5 Terms query</a></li>
 
                 <li><a href="2.6-suggester-query.php">2.6 Suggester query</a></li>
+                <li><a href="2.7-extract-query.php">2.7 Extract query</a></li>
             </ul>
 
             <li>4. Usage modes</li>

library/Solarium/Core/Client/Adapter/ZendHttp.php

@@ -178,7 +178,6 @@ class ZendHttp extends Configurable implements AdapterInterface
                 break;
             case Request::METHOD_POST:
                 $client->setMethod(\Zend_Http_Client::POST);
-
                 if ($request->getFileUpload()) {
                     $this->prepareFileUpload($client, $request);
                 } else {

library/Solarium/Core/Client/Client.php

@@ -1088,6 +1088,6 @@ class Client extends Configurable
      */
     public function createExtract($options = null)
     {
-        return $this->createExtract(self::QUERY_EXTRACT, $options);
+        return $this->createQuery(self::QUERY_EXTRACT, $options);
     }
 }

library/Solarium/QueryType/Extract/Query.php

@@ -66,9 +66,10 @@ class Query extends BaseQuery
      *
      * @var array
      */
-    protected $_options = array(
+    protected $options = array(
         'handler'     => 'update/extract',
         'resultclass' => 'Solarium\QueryType\Extract\Result',
+        'documentclass' => 'Solarium\QueryType\Update\Query\Document',
         'omitheader'  => true,
     );
 
@@ -117,10 +118,10 @@ class Query extends BaseQuery
      *
      * @return void
      */
-    protected function _init()
+    protected function init()
     {
-        if (isset($this->_options['fmap'])) {
-            $this->setFieldMappings($this->_options['fmap']);
+        if (isset($this->options['fmap'])) {
+            $this->setFieldMappings($this->options['fmap']);
         }
     }
 
@@ -358,4 +359,46 @@ class Query extends BaseQuery
 
         return $this;
     }
+
+    /**
+    * Set a custom document class for use in the createDocument method
+    *
+    * This class should implement the document interface
+    *
+    * @param string $value classname
+    * @return self Provides fluent interface
+    */
+    public function setDocumentClass($value)
+    {
+        return $this->setOption('documentclass', $value);
+    }
+
+    /**
+     * Get the current documentclass option
+     *
+     * The value is a classname, not an instance
+     *
+     * @return string
+     */
+    public function getDocumentClass()
+    {
+        return $this->getOption('documentclass');
+    }
+
+    /**
+     * Create a document object instance
+     *
+     * You can optionally directly supply the fields and boosts
+     * to get a ready-made document instance for direct use in an add command
+     *
+     * @param  array    $fields
+     * @param  array    $boosts
+     * @return Document
+     */
+    public function createDocument($fields = array(), $boosts = array())
+    {
+        $class = $this->getDocumentClass();
+        return new $class($fields, $boosts);
+    }
+
 }