Apache Solr是一个独立的企业级搜索应用服务器，它对外提供类似于Web-service的API接口。用户可以通过http请求，向搜索引擎服务器提交一定格式的XML文件，生成索引；也可以通过Http Get操作提出查找请求，并得到XML格式的返回结果。
If you want to add the Solr extension to your exisiting PHP install, you need to make sure you use the same API to build the extension as was used to build PHP or you'll get errors like: PHP Warning: PHP Startup: solr: Unable to initialize module\nModule compiled with module API=20060613\nPHP compiled with module API=20090626\nThese options need to match\n in Unknown on line 0 To avoid this, use your existing phpize and php-config when compiling the extension (change the '/usr/local/php5/' below to whatever your existing path is.) /usr/local/php5/bin/phpize ./configure --with-php-config=/usr/local/php5/bin/php-config make make test make install
范例
Examples of how to use the Apache Solr extension in PHP
Example #1 Contents of the BootStrap file
<?php
/* Domain name of the Solr server */
define('SOLR_SERVER_HOSTNAME', 'solr.example.com');
/* Whether or not to run in secure mode */
define('SOLR_SECURE', true);
/* HTTP Port to connection */
define('SOLR_SERVER_PORT', ((SOLR_SECURE) ? 8443 : 8983));
/* HTTP Basic Authentication Username */
define('SOLR_SERVER_USERNAME', 'admin');
/* HTTP Basic Authentication password */
define('SOLR_SERVER_PASSWORD', 'changeit');
/* HTTP connection timeout */
/* This is maximum time in seconds allowed for the http data transfer operation. Default value is 30 seconds */
define('SOLR_SERVER_TIMEOUT', 10);
/* File name to a PEM-formatted private key + private certificate (concatenated in that order) */
define('SOLR_SSL_CERT', 'certs/combo.pem');
/* File name to a PEM-formatted private certificate only */
define('SOLR_SSL_CERT_ONLY', 'certs/solr.crt');
/* File name to a PEM-formatted private key */
define('SOLR_SSL_KEY', 'certs/solr.key');
/* Password for PEM-formatted private key file */
define('SOLR_SSL_KEYPASSWORD', 'StrongAndSecurePassword');
/* Name of file holding one or more CA certificates to verify peer with*/
define('SOLR_SSL_CAINFO', 'certs/cacert.crt');
/* Name of directory holding multiple CA certificates to verify peer with */
define('SOLR_SSL_CAPATH', 'certs/');
?>
Example #2 Adding a document to the index
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
);
$client = new SolrClient($options);
$doc = new SolrInputDocument();
$doc->addField('id', 334455);
$doc->addField('cat', 'Software');
$doc->addField('cat', 'Lucene');
$updateResponse = $client->addDocument($doc);
print_r($updateResponse->getResponse());
?>
以上例程的输出类似于：
SolrObject Object
(
[responseHeader] => SolrObject Object
(
[status] => 0
[QTime] => 446
)
)
Example #3 Merging one document into another document
<?php
include "bootstrap.php";
$doc = new SolrDocument();
$second_doc = new SolrDocument();
$doc->addField('id', 1123);
$doc->features = "PHP Client Side";
$doc->features = "Fast development cycles";
$doc['cat'] = 'Software';
$doc['cat'] = 'Custom Search';
$doc->cat = 'Information Technology';
$second_doc->addField('cat', 'Lucene Search');
$second_doc->merge($doc, true);
print_r($second_doc->toArray());
?>
以上例程的输出类似于：
Array
(
[document_boost] => 0
[field_count] => 3
[fields] => Array
(
[0] => SolrDocumentField Object
(
[name] => cat
[boost] => 0
[values] => Array
(
[0] => Software
[1] => Custom Search
[2] => Information Technology
)
)
[1] => SolrDocumentField Object
(
[name] => id
[boost] => 0
[values] => Array
(
[0] => 1123
)
)
[2] => SolrDocumentField Object
(
[name] => features
[boost] => 0
[values] => Array
(
[0] => PHP Client Side
[1] => Fast development cycles
)
)
)
)
Example #4 Searching for documents - SolrObject responses
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
);
$client = new SolrClient($options);
$query = new SolrQuery();
$query->setQuery('lucene');
$query->setStart(0);
$query->setRows(50);
$query->addField('cat')->addField('features')->addField('id')->addField('timestamp');
$query_response = $client->query($query);
$response = $query_response->getResponse();
print_r($response);
?>
以上例程的输出类似于：
SolrObject Object
(
[responseHeader] => SolrObject Object
(
[status] => 0
[QTime] => 1
[params] => SolrObject Object
(
[wt] => xml
[rows] => 50
[start] => 0
[indent] => on
[q] => lucene
[fl] => cat,features,id,timestamp
[version] => 2.2
)
)
[response] => SolrObject Object
(
[numFound] => 3
[start] => 0
[docs] => Array
(
[0] => SolrObject Object
(
[cat] => Array
(
[0] => Software
[1] => Lucene
)
[id] => 334456
)
[1] => SolrObject Object
(
[cat] => Array
(
[0] => Software
[1] => Lucene
)
[id] => 334455
)
[2] => SolrObject Object
(
[cat] => Array
(
[0] => software
[1] => search
)
[features] => Array
(
[0] => Advanced Full-Text Search Capabilities using Lucene
[1] => Optimized for High Volume Web Traffic
[2] => Standards Based Open Interfaces - XML and HTTP
[3] => Comprehensive HTML Administration Interfaces
[4] => Scalability - Efficient Replication to other Solr Search Servers
[5] => Flexible and Adaptable with XML configuration and Schema
[6] => Good unicode support: héllo (hello with an accent over the e)
)
[id] => SOLR1000
[timestamp] => 2009-09-04T20:38:55.906
)
)
)
)
Example #5 Searching for documents - SolrDocument responses
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
);
$client = new SolrClient($options);
$query = new SolrQuery();
$query->setQuery('lucene');
$query->setStart(0);
$query->setRows(50);
$query->addField('cat')->addField('features')->addField('id')->addField('timestamp');
$query_response = $client->query($query);
$query_response->setParseMode(SolrQueryResponse::PARSE_SOLR_DOC);
$response = $query_response->getResponse();
print_r($response);
?>
以上例程的输出类似于：
SolrObject Object
(
[responseHeader] => SolrObject Object
(
[status] => 0
[QTime] => 1
[params] => SolrObject Object
(
[wt] => xml
[rows] => 50
[start] => 0
[indent] => on
[q] => lucene
[fl] => cat,features,id,timestamp
[version] => 2.2
)
)
[response] => SolrObject Object
(
[numFound] => 3
[start] => 0
[docs] => Array
(
[0] => SolrDocument Object
(
[_hashtable_index:SolrDocument:private] => 19740
)
[1] => SolrDocument Object
(
[_hashtable_index:SolrDocument:private] => 25485
)
[2] => SolrDocument Object
(
[_hashtable_index:SolrDocument:private] => 25052
)
)
)
)
Example #6 Simple TermsComponent example - basic
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
);
$client = new SolrClient($options);
$query = new SolrQuery();
$query->setTerms(true);
$query->setTermsField('cat');
$updateResponse = $client->query($query);
print_r($updateResponse->getResponse());
?>
以上例程的输出类似于：
SolrObject Object
(
[responseHeader] => SolrObject Object
(
[status] => 0
[QTime] => 2
)
[terms] => SolrObject Object
(
[cat] => SolrObject Object
(
[electronics] => 14
[Lucene] => 4
[Software] => 4
[memory] => 3
[card] => 2
[connector] => 2
[drive] => 2
[graphics] => 2
[hard] => 2
[monitor] => 2
)
)
)
Example #7 Simple TermsComponent example - using a prefix
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
);
$client = new SolrClient($options);
$query = new SolrQuery();
$query->setTerms(true);
/* Return only terms starting with $prefix */
$prefix = 'c';
$query->setTermsField('cat')->setTermsPrefix($prefix);
$updateResponse = $client->query($query);
print_r($updateResponse->getResponse());
?>
以上例程的输出类似于：
SolrObject Object
(
[responseHeader] => SolrObject Object
(
[status] => 0
[QTime] => 1
)
[terms] => SolrObject Object
(
[cat] => SolrObject Object
(
[card] => 2
[connector] => 2
[camera] => 1
[copier] => 1
)
)
)
Example #8 Simple TermsComponent example - specifying a minimum frequency
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
);
$client = new SolrClient($options);
$query = new SolrQuery();
$query->setTerms(true);
/* Return only terms starting with $prefix */
$prefix = 'c';
/* Return only terms with a frequency of 2 or greater */
$min_frequency = 2;
$query->setTermsField('cat')->setTermsPrefix($prefix)->setTermsMinCount($min_frequency);
$updateResponse = $client->query($query);
print_r($updateResponse->getResponse());
?>
以上例程的输出类似于：
SolrObject Object
(
[responseHeader] => SolrObject Object
(
[status] => 0
[QTime] => 0
)
[terms] => SolrObject Object
(
[cat] => SolrObject Object
(
[card] => 2
[connector] => 2
)
)
)
Example #9 Simple Facet Example
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
);
$client = new SolrClient($options);
$query = new SolrQuery('*:*');
$query->setFacet(true);
$query->addFacetField('cat')->addFacetField('name')->setFacetMinCount(2);
$updateResponse = $client->query($query);
$response_array = $updateResponse->getResponse();
$facet_data = $response_array->facet_counts->facet_fields;
print_r($facet_data);
?>
以上例程的输出类似于：
SolrObject Object
(
[cat] => SolrObject Object
(
[electronics] => 14
[memory] => 3
[Lucene] => 2
[Software] => 2
[card] => 2
[connector] => 2
[drive] => 2
[graphics] => 2
[hard] => 2
[monitor] => 2
[search] => 2
[software] => 2
)
[name] => SolrObject Object
(
[gb] => 6
[1] => 3
[184] => 3
[2] => 3
[3200] => 3
[400] => 3
[500] => 3
[ddr] => 3
[i] => 3
[ipod] => 3
[memori] => 3
[pc] => 3
[pin] => 3
[pod] => 3
[sdram] => 3
[system] => 3
[unbuff] => 3
[canon] => 2
[corsair] => 2
[drive] => 2
[hard] => 2
[mb] => 2
[n] => 2
[power] => 2
[retail] => 2
[video] => 2
[x] => 2
)
)
Example #10 Simple Facet Example - with optional field override for mincount
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
);
$client = new SolrClient($options);
$query = new SolrQuery('*:*');
$query->setFacet(true);
$query->addFacetField('cat')->addFacetField('name')->setFacetMinCount(2)->setFacetMinCount(4, 'name');
$updateResponse = $client->query($query);
$response_array = $updateResponse->getResponse();
$facet_data = $response_array->facet_counts->facet_fields;
print_r($facet_data);
?>
以上例程的输出类似于：
SolrObject Object
(
[cat] => SolrObject Object
(
[electronics] => 14
[memory] => 3
[Lucene] => 2
[Software] => 2
[card] => 2
[connector] => 2
[drive] => 2
[graphics] => 2
[hard] => 2
[monitor] => 2
[search] => 2
[software] => 2
)
[name] => SolrObject Object
(
[gb] => 6
)
)
Example #11 Facet Date Example
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
);
$client = new SolrClient($options);
$query = new SolrQuery('*:*');
$query->setFacet(true);
$query->addFacetDateField('manufacturedate_dt');
$query->setFacetDateStart('2006-02-13T00:00:00Z');
$query->setFacetDateEnd('2012-02-13T00:00:00Z');
$query->setFacetDateGap('+1YEAR');
$query->setFacetDateHardEnd(1);
$query->addFacetDateOther('before');
$updateResponse = $client->query($query);
$response_array = $updateResponse->getResponse();
$facet_data = $response_array->facet_counts->facet_dates;
print_r($facet_data);
?>
以上例程的输出类似于：
SolrObject Object
(
[manufacturedate_dt] => SolrObject Object
(
[2006-02-13T00:00:00Z] => 9
[2007-02-13T00:00:00Z] => 0
[2008-02-13T00:00:00Z] => 0
[2009-02-13T00:00:00Z] => 0
[2010-02-13T00:00:00Z] => 0
[2011-02-13T00:00:00Z] => 0
[gap] => +1YEAR
[start] => 2006-02-13T00:00:00Z
[end] => 2012-02-13T00:00:00Z
[before] => 2
)
)
Example #12 Connecting to SSL-Enabled Server
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
'timeout' => SOLR_SERVER_TIMEOUT,
'secure' => SOLR_SECURE,
'ssl_cert' => SOLR_SSL_CERT_ONLY,
'ssl_key' => SOLR_SSL_KEY,
'ssl_keypassword' => SOLR_SSL_KEYPASSWORD,
'ssl_cainfo' => SOLR_SSL_CAINFO,
);
$client = new SolrClient($options);
$query = new SolrQuery('*:*');
$query->setFacet(true);
$query->addFacetField('cat')->addFacetField('name')->setFacetMinCount(2)->setFacetMinCount(4, 'name');
$updateResponse = $client->query($query);
$response_array = $updateResponse->getResponse();
$facet_data = $response_array->facet_counts->facet_fields;
print_r($facet_data);
?>
以上例程的输出类似于：
SolrObject Object
(
[cat] => SolrObject Object
(
[electronics] => 14
[memory] => 3
[Lucene] => 2
[Software] => 2
[card] => 2
[connector] => 2
[drive] => 2
[graphics] => 2
[hard] => 2
[monitor] => 2
[search] => 2
[software] => 2
)
[name] => SolrObject Object
(
[gb] => 6
)
)
Example #13 Collapsing a SolrQuery
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
'path' => SOLR_SERVER_PATH
);
$client = new SolrClient($options);
$query = new SolrQuery('*:*');
$collapseFunction = new SolrCollapseFunction('manu_id_s');
$collapseFunction
->setSize(2)
->setNullPolicy(SolrCollapseFunction::NULLPOLICY_IGNORE);
$query
->collapse($collapseFunction)
->setRows(4);
$queryResponse = $client->query($query);
$response = $queryResponse->getResponse();
print_r($response);
?>
以上例程的输出类似于：
SolrObject Object
(
[responseHeader] => SolrObject Object
(
[status] => 0
[QTime] => 1
[params] => SolrObject Object
(
[q] => *:*
[indent] => on
[fq] => {!collapse field=manu_id_s size=2 nullPolicy=ignore}
[rows] => 4
[version] => 2.2
[wt] => xml
)
)
[response] => SolrObject Object
(
[numFound] => 14
[start] => 0
[docs] => Array
(
[0] => SolrObject Object
(
[id] => SP2514N
[name] => Array
(
[0] => Samsung SpinPoint P120 SP2514N - hard drive - 250 GB - ATA-133
)
[manu] => Array
(
[0] => Samsung Electronics Co. Ltd.
)
[manu_id_s] => samsung
[cat] => Array
(
[0] => electronics
[1] => hard drive
)
[features] => Array
(
[0] => 7200RPM, 8MB cache, IDE Ultra ATA-133
[1] => NoiseGuard, SilentSeek technology, Fluid Dynamic Bearing (FDB) motor
)
[price] => Array
(
[0] => 92
)
[popularity] => Array
(
[0] => 6
)
[inStock] => Array
(
[0] => 1
)
[manufacturedate_dt] => 2006-02-13T15:26:37Z
[store] => Array
(
[0] => 35.0752,-97.032
)
[_version_] => 1510294336412057600
)
[1] => SolrObject Object
(
[id] => 6H500F0
[name] => Array
(
[0] => Maxtor DiamondMax 11 - hard drive - 500 GB - SATA-300
)
[manu] => Array
(
[0] => Maxtor Corp.
)
[manu_id_s] => maxtor
[cat] => Array
(
[0] => electronics
[1] => hard drive
)
[features] => Array
(
[0] => SATA 3.0Gb/s, NCQ
[1] => 8.5ms seek
[2] => 16MB cache
)
[price] => Array
(
[0] => 350
)
[popularity] => Array
(
[0] => 6
)
[inStock] => Array
(
[0] => 1
)
[store] => Array
(
[0] => 45.17614,-93.87341
)
[manufacturedate_dt] => 2006-02-13T15:26:37Z
[_version_] => 1510294336449806336
)
[2] => SolrObject Object
(
[id] => F8V7067-APL-KIT
[name] => Array
(
[0] => Belkin Mobile Power Cord for iPod w/ Dock
)
[manu] => Array
(
[0] => Belkin
)
[manu_id_s] => belkin
[cat] => Array
(
[0] => electronics
[1] => connector
)
[features] => Array
(
[0] => car power adapter, white
)
[weight] => Array
(
[0] => 4
)
[price] => Array
(
[0] => 19.95
)
[popularity] => Array
(
[0] => 1
)
[inStock] => Array
(
[0] =>
)
[store] => Array
(
[0] => 45.18014,-93.87741
)
[manufacturedate_dt] => 2005-08-01T16:30:25Z
[_version_] => 1510294336458194944
)
[3] => SolrObject Object
(
[id] => MA147LL/A
[name] => Array
(
[0] => Apple 60 GB iPod with Video Playback Black
)
[manu] => Array
(
[0] => Apple Computer Inc.
)
[manu_id_s] => apple
[cat] => Array
(
[0] => electronics
[1] => music
)
[features] => Array
(
[0] => iTunes, Podcasts, Audiobooks
[1] => Stores up to 15,000 songs, 25,000 photos, or 150 hours of video
[2] => 2.5-inch, 320x240 color TFT LCD display with LED backlight
[3] => Up to 20 hours of battery life
[4] => Plays AAC, MP3, WAV, AIFF, Audible, Apple Lossless, H.264 video
[5] => Notes, Calendar, Phone book, Hold button, Date display, Photo wallet, Built-in games, JPEG photo playback, Upgradeable firmware, USB 2.0 compatibility, Playback speed control, Rechargeable capability, Battery level indication
)
[includes] => Array
(
[0] => earbud headphones, USB cable
)
[weight] => Array
(
[0] => 5.5
)
[price] => Array
(
[0] => 399
)
[popularity] => Array
(
[0] => 10
)
[inStock] => Array
(
[0] => 1
)
[store] => Array
(
[0] => 37.7752,-100.0232
)
[manufacturedate_dt] => 2005-10-12T08:00:00Z
[_version_] => 1510294336562003968
)
)
)
)
Example #14 Solr Real Time Get (RTG) example SolrClient::getById()
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
'path' => SOLR_SERVER_PATH
);
$client = new SolrClient($options);
$response = $client->getById('GB18030TEST');
print_r($response->getResponse());
?>
以上例程的输出类似于：
SolrObject Object
(
[doc] => SolrObject Object
(
[id] => GB18030TEST
[name] => Array
(
[0] => Test with some GB18030 encoded characters
)
[features] => Array
(
[0] => No accents here
[1] => 这是一个功能
[2] => This is a feature (translated)
[3] => 这份文件是很有光泽
[4] => This document is very shiny (translated)
)
[price] => Array
(
[0] => 0
)
[inStock] => Array
(
[0] => 1
)
[_version_] => 1510294336239042560
)
)
As of solr 4.0 the waitFlush parameter is removed. Source http://wiki.apache.org/solr/UpdateXmlMessages $client->commit() throws an error [SolrClientException] Unsuccessful update request. Response Code 400. <?xml version="1.0" encoding="UTF-8"?> <response> <lst name="responseHeader"> <int name="status">400</int> <int name="QTime">1</int> </lst> <lst name="error"> <str name="msg">Unknown commit parameter 'waitFlush'</str> <int name="code">400</int> </lst> </response>
If you like to access a different RequestHander than '/select' you can change it via http://php.net/manual/en/solrclient.setservlet.php
If you are using Solr's multicore feature, you can access the cores via the path parameter in the $options array. E.g. <?php $options = array(...., 'path' => 'solr/core0', ...); ?>
In case someone would like to use this solrClient with solr v.4.0 and higher i've prepared my own commit function
class solr {
public function delete($query ) {
$this->_client->deleteByQuery($query);
$this->commit();
}
public function commit() {
$solrConfig= // array with solr host, port, path to collection (/solr/my_collection),
$solrAddress = $solrConfig['hostname'] . ':' . $solrConfig['port'] . $solrConfig['path'];
$output = array();
$response = exec('curl ' . $solrAddress . '/update?commit=true', $output);
return $output;
}
}As of solr 4.0 the waitFlush parameter is removed.
If you're using the solr 4.0 or later version (and you have to),when you do this
<?php $client->commit(); ?>
you will get a solr error like this:
"Unknown commit parameter 'waitFlush'."
If you insist on using this PHP Solr extension and solr 4.0 or later version,you can edit the extension's source (version 1.0.2) php_solr_client.c.
for the SolrClient's optimize method:
at line 1490 :
zend_bool waitFlush = 1, waitSearcher = 1;
after edited:
zend_bool waitSearcher = 1;
at line 1493:
char *waitFlushValue, *waitSearcherValue;
after edited:
zend_bool waitSearcher = 1;
at line 1502:
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|sbb", &maxSegments, &maxSegmentsLen, &waitFlush, &waitSearcher) == FAILURE) {
after editd:
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|sb", &maxSegments, &maxSegmentsLen, &waitSearcher) == FAILURE) {
remove the line 1509 and 1515.
And do the same edit for the SolrClient's commit method at line 1561,1564,1573 and remove the line 1580,1586
The final step, compile the code and install it.
Good luck!if your path to solr is something other than: /solr
you should add this to the bootstrap file above:
define('SOLR_SERVER_PATH', 'my-solr-url');
and then a corresponding entry to the options array in your client php code like:
'path' => SOLR_SERVER_PATH
I couldn't find this is in the documentation and had to peek at the source to figure it out.If you're testing these examples on a fresh install of solr, you will need to run a commit statement after you add documents to receive results when searching. For example, add this: <?php $client->commit(); ?> to example 3 to be able to get any results when doing a search using example 5.
The documentation in the example section doesn't mention that you need to commit once you've added doc(s).
So in short it would be something like:
$client = new SolrClient(array('hostname' => '127.0.0.1', 'port' => 8080));
$doc = new SolrInputDocument();
$doc->addField('id', 12345);
$doc->addField('name', 'some person');
$result = $client->addDocument($doc);
/* you are not done yet, you need to commit */
$client->commit();
Now if you query you should see your doc =]