How to use php for full text search and keyword extraction

How to use php for full text search and keyword extraction

Full text search and keyword extraction are functions common to modern websites and applications that provide users with better search experience and relevant recommendations. In php, we can use full text indexing and keyword extraction techniques to perform these functions. This paper will describe how full text search and keyword extraction can be performed using php and provide examples of corresponding codes。

Full text search achievement

Full text search is the search for records containing specified keywords in text contents. In php, you can use the full text index function of the database or the search engine library for full text search。

1. 1 use of full database index

Databases such as mysql and postgresql provide full-text indexing and can expedite search by creating full-text indexing in the database table. The following is an example of a full-text index using mysql:

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// create full-text index
create fultext index name on table name;
// execute full text search
select * from table name where mach (column name) against ('keyword');

1. 2 use of search engine libraries

In addition to full-text indexing of databases, we can use open-source search engine libraries to perform full-text search functions such as elasticsearch, apache solr, etc. Here is an example of a full-text search using elasticsearch:

(a) require 'vedor/autoload. Php';
i don't know. Elasticsearch
$hosts = ['localhost:9200'];
$client = cleanbuilder: :create()
-sethosts.
- >build();
// create index
$params =[s]
'index' means 'my index',
♪ 'body' ♪
'settings' is in the middle of the night.
'nomber of shalls' =1,
'nomber of replicas'=0


];
$espo= $client->indices()->create ($params);
// create document
$params =[s]
'index' means 'my index',
'id' = '1',
♪ 'body' ♪
'title' means 'example d'I don't know.
'this is an example dI don't know, documentation for full text search.

];
$espoNse = $client->index ($params);
// execute full text search
$params =[s]
'index' means 'my index',
♪ 'body' ♪
♪ 'query' ♪
♪ 'mattch' ♪
'content' is 'search keyword'



];
$espoNse = $client->search ($params);

Achievement of keyword extraction

Key-word extraction is the extraction of representative keywords from text, often used to generate labels, search suggestions, etc. In php, you can use an open-source keyword extraction library to perform keyword extraction functions such as textank, tf-idf, etc. The following is an example of the use of textank to achieve keyword extraction:

(a) require 'vedor/autoload. Php';
i'm not sure what i'm talking about.
/ / use textank to extract keywords
$tr = new textrankfacade();
$keywords = $tr-'this is an example dI'm sorry, i'm sorry. Print r ($keywords);

The above is a simple example of the full text search and keyword extraction function using php. In practical applications, we can also improve the accuracy and effectiveness of search and extraction in combination with other techniques such as semantics, semantics, etc. I hope this will help you