索引管理操作可以让你管理集群中的索引，例如创建、删除和更新索引和索引的映射/配置。
索引操作包含在一个特定的命名空间内，与其它直接从属于客户端对象的方法隔离开来。让我们创建一个索引作为示例：
$client = ClientBuilder::create()->build();
$params = [
'index' => 'my_index'
];
// Create the index
$response = $client->indices()->create($params);
你可以在一个创建索引 API 中指定任何参数。所有的参数通常会注入请求体中的 body 参数下：
$client = ClientBuilder::create()->build();
$params = [
'index' => 'my_index',
'body' => [
'settings' => [
'number_of_shards' => 3,
'number_of_replicas' => 2
],
'mappings' => [
'my_type' => [
'_source' => [
'enabled' => true
],
'properties' => [
'first_name' => [
'type' => 'string',
'analyzer' => 'standard'
],
'age' => [
'type' => 'integer'
]
]
]
]
]
];
// Create the index with mappings and settings now
$response = $client->indices()->create($params);
这是一个以更为复杂的方式创建索引的示例，示例中展示了如何定义 analyzers，tokenizers，filters 和索引的 settings。虽然创建方式与之前的示例本质一样，但是这个复杂示例对于理解客户端的使用方法具有莫大帮助，因为这种特定的语法结构很容易被混淆。
$params = [
'index' => 'reuters',
'body' => [
'settings' => [
'number_of_shards' => 1,
'number_of_replicas' => 0,
'analysis' => [
'filter' => [
'shingle' => [
'type' => 'shingle'
]
],
'char_filter' => [
'pre_negs' => [
'type' => 'pattern_replace',
'pattern' => '(\\w+)\\s+((?i:never|no|nothing|nowhere|noone|none|not|havent|hasnt|hadnt|cant|couldnt|shouldnt|wont|wouldnt|dont|doesnt|didnt|isnt|arent|aint))\\b',
'replacement' => '~$1 $2'
],
'post_negs' => [
'type' => 'pattern_replace',
'pattern' => '\\b((?i:never|no|nothing|nowhere|noone|none|not|havent|hasnt|hadnt|cant|couldnt|shouldnt|wont|wouldnt|dont|doesnt|didnt|isnt|arent|aint))\\s+(\\w+)',
'replacement' => '$1 ~$2'
]
],
'analyzer' => [
'reuters' => [
'type' => 'custom',
'tokenizer' => 'standard',
'filter' => ['lowercase', 'stop', 'kstem']
]
]
]
],
'mappings' => [
'_default_' => [
'properties' => [
'title' => [
'type' => 'string',
'analyzer' => 'reuters',
'term_vector' => 'yes',
'copy_to' => 'combined'
],
'body' => [
'type' => 'string',
'analyzer' => 'reuters',
'term_vector' => 'yes',
'copy_to' => 'combined'
],
'combined' => [
'type' => 'string',
'analyzer' => 'reuters',
'term_vector' => 'yes'
],
'topics' => [
'type' => 'string',
'index' => 'not_analyzed'
],
'places' => [
'type' => 'string',
'index' => 'not_analyzed'
]
]
],
'my_type' => [
'properties' => [
'my_field' => [
'type' => 'string'
]
]
]
]
]
];
$client->indices()->create($params);删除一个索引十分简单：
$params = ['index' => 'my_index'];
$response = $client->indices()->delete($params);
Put Settings API 允许你更改索引的配置参数:
$params = [
'index' => 'my_index',
'body' => [
'settings' => [
'number_of_replicas' => 0,
'refresh_interval' => -1
]
]
];
$response = $client->indices()->putSettings($params);
Get Settings API 可以让你知道一个或多个索引的当前配置参数：
// Get settings for one index
$params = ['index' => 'my_index'];
$response = $client->indices()->getSettings($params);
// Get settings for several indices
$params = [
'index' => [ 'my_index', 'my_index2' ]
];
$response = $client->indices()->getSettings($params);
Put Mappings API 允许你更改或增加一个索引的映射。
// Set the index and type
$params = [
'index' => 'my_index',
'type' => 'my_type2',
'body' => [
'my_type2' => [
'_source' => [
'enabled' => true
],
'properties' => [
'first_name' => [
'type' => 'string',
'analyzer' => 'standard'
],
'age' => [
'type' => 'integer'
]
]
]
]
];
// Update the index mapping
$client->indices()->putMapping($params);
Get Mappings API 返回索引和类型的映射细节。你可以指定一些索引和类型，取决于你希望检索什么映射。
// Get mappings for all indexes and types
$response = $client->indices()->getMapping();
// Get mappings for all types in 'my_index'
$params = ['index' => 'my_index'];
$response = $client->indices()->getMapping($params);
// Get mappings for all types of 'my_type', regardless of index
$params = ['type' => 'my_type' ];
$response = $client->indices()->getMapping($params);
// Get mapping 'my_type' in 'my_index'
$params = [
'index' => 'my_index'
'type' => 'my_type'
];
$response = $client->indices()->getMapping($params);
// Get mappings for two indexes
$params = [
'index' => [ 'my_index', 'my_index2' ]
];
$response = $client->indices()->getMapping($params);