Some options during index creation of elasticsearch

I want to use elasticsearch to perform intra-site search for blog articles and use php in the background. All the fields in article table articles are as follows: {code...} now I want to create an index for the title field, content field, and updated_at field in the article table. The following is my reference to elastics... I want to use elasticsearch for blog posts for intra-site search, using php in the background.

All the fields in the article table articles are as follows:

id     title     content     user_id    created_at     updated_at

Now I want to create an index for the title field, content field, and updated_at field in the document table.

The following is a demo of creating an index blog and creating an article by referring to the official documents of the elasticsearch-php client. ik word segmentation is used for word segmentation.

Some of the options are not clear. the specific questions are in the code below (4). please help me solve them. thank you.

Official document link: https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/_index_management_operations.html#_create_an_index_advanced_example

$ Params = ['index' => 'blog ', 'body' => ['Settings' => ['number _ of_shards' => 1, 'number _ of_replicas '=> 0, 'analytic' => ['filter' => [// 1. Should the two shingle values be changed to article? 'Shingle' => ['type' => 'shingle'], // 2. what does the content in char_filter mean? Including pre_negs and post_negs. '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 +) ', 'replace' => '$1 ~ $2 '], // 3. how do I modify the analyzer content? 'Analyzer '=> ['blog' => ['type' => 'custom', 'tokenizer '=> 'standard', 'filter' => ['lowercase ', 'STOP', 'kstem '], 'mappings '=> ['article' => ["_ all" => ["analyzer" => "ik_max_word", "search_analyzer" => "ik_max_word ", "term_vector" => "no", "store" => "false"], 'properties' => ['title' => ['type' => 'string ', 'store' => 'no', 'term _ vector '=>' with _ positions_offsets ', 'analyzer '=> 'Ik _ max_word', 'search _ analyzer '=> 'Ik _ max_word', 'include _ in_all '=> 'true ', 'boost '=> 9], 'content' => ['type' => 'string', 'store' => 'no ', 'term _ vector '=>' with _ positions_offsets ', 'analyzer' => 'Ik _ max_word ', 'search _ analyzer' => 'Ik _ max_word ', 'include _ in_all '=> 'true', 'boost' => 8], // 4. the time is only used for sorting during search. how can I fill in the following options? 'Updated _ at' => ['type' => '', 'store' =>'', 'term _ vector '=> '', 'analyzer '=> '', 'search _ analyzer' =>'', 'include _ in_all '=> '', 'boost' =>]; $ client-> indices ()-> create ($ params );

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I want to use elasticsearch to perform intra-site search for blog articles and use php in the background.

All the fields in the article table articles are as follows:

id     title     content     user_id    created_at     updated_at

Now I want to create an index for the title field, content field, and updated_at field in the document table.

The following is a demo of creating an index blog and creating an article by referring to the official documents of the elasticsearch-php client. ik word segmentation is used for word segmentation.

Some of the options are not clear. the specific questions are in the code below (4). please help me solve them. thank you.

Official document link: https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/_index_management_operations.html#_create_an_index_advanced_example

$ Params = ['index' => 'blog ', 'body' => ['Settings' => ['number _ of_shards' => 1, 'number _ of_replicas '=> 0, 'analytic' => ['filter' => [// 1. Should the two shingle values be changed to article? 'Shingle' => ['type' => 'shingle'], // 2. what does the content in char_filter mean? Including pre_negs and post_negs. '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 +) ', 'replace' => '$1 ~ $2 '], // 3. how do I modify the analyzer content? 'Analyzer '=> ['blog' => ['type' => 'custom', 'tokenizer '=> 'standard', 'filter' => ['lowercase ', 'STOP', 'kstem '], 'mappings '=> ['article' => ["_ all" => ["analyzer" => "ik_max_word", "search_analyzer" => "ik_max_word ", "term_vector" => "no", "store" => "false"], 'properties' => ['title' => ['type' => 'string ', 'store' => 'no', 'term _ vector '=>' with _ positions_offsets ', 'analyzer '=> 'Ik _ max_word', 'search _ analyzer '=> 'Ik _ max_word', 'include _ in_all '=> 'true ', 'boost '=> 9], 'content' => ['type' => 'string', 'store' => 'no ', 'term _ vector '=>' with _ positions_offsets ', 'analyzer' => 'Ik _ max_word ', 'search _ analyzer' => 'Ik _ max_word ', 'include _ in_all '=> 'true', 'boost' => 8], // 4. the time is only used for sorting during search. how can I fill in the following options? 'Updated _ at' => ['type' => '', 'store' =>'', 'term _ vector '=> '', 'analyzer '=> '', 'search _ analyzer' =>'', 'include _ in_all '=> '', 'boost' =>]; $ client-> indices ()-> create ($ params );