textualization/语义搜索

使用 Ropherta 嵌入和 SQLite3 向量扩展进行语义搜索。

维护者

详细信息

github.com/Textualization/php-semantic-search

源代码

问题

资助包维护！
Ko Fi

安装: 14

依赖项: 0

建议者: 0

安全性: 0

星星: 6

关注者: 1

分支: 2

开放性问题: 4

v0.0.5 2024-04-29 13:17 UTC

Requires

Requires (Dev)

MIT eea9af0ac356038264dde312585786909a879b5a

  • Pablo Duboue <pablo.duboue.woop@gmail.com>

This package is auto-updated.

Last update: 2024-09-29 14:13:52 UTC

README

这些类包含语义搜索的接口和实现，使用Ropherta作为嵌入器，使用SQLite3 Vector Search作为向量数据库。还提供了使用SQLite3 FTS4和BM25的关键词搜索。

为了填充向量数据库，Ingester类包含一个类似于LangChain中可用的递归分块器，但有所加速，并具有回指源文档偏移量的能力。

更高级的使用包括使用向量搜索作为重排器和使用HyDE来获取对称嵌入。

StackOverflow和PHP文档中有超过35,000个文档的示例源文档和索引可以通过下载。

文档格式

摄取组件以JSONL格式接收文档，每行一个有效的JSON文档。

文本应该是UTF-8编码的纯文本（根据JSON规范）。系统将在摄取时将其分割成块。

{ "url": "...", "title": "...", "text": "...", "section": "...", "license": "..." }

向量索引依赖项

您需要安装sqlite-vss（vector0和vss0.so）

php.ini

设置

[sqlite3]
; Directory pointing to SQLite3 extensions
; https://php.ac.cn/sqlite3.extension-dir
sqlite3.extension_dir = /path/to/the/sqlite3-vss-dlls

sqlite3-vss依赖项

apt install libgomp1 libblas3 liblapack3

Ropherta依赖项

安装ONNX框架

composer exec -- php -r "require 'vendor/autoload.php'; OnnxRuntime\Vendor::check();"

如果您想使用多语言模型，不要下载此模型，请按照下一节中的说明操作。对于英语模型，请下载Sentence RoBERTa ONNX模型（这可能需要一些时间，模型大小为362Mb）

composer exec -- php -r "require 'vendor/autoload.php'; Textualization\SentenceTransphormers\Vendor::check();"

多语言模型

下载SentencePiece库

composer exec -- php -r "require 'vendor/autoload.php'; Textualization\SentencePiece\Vendor::check();"

下载XLM Tokenizer SentencePiece BPE模型

composer exec -- php -r "require 'vendor/autoload.php'; Textualization\Ropherta\Tokenizer\Vendor::check();"

下载Multilingual-E5-small模型（大小为471Mb）

composer exec -- php -r "require 'vendor/autoload.php'; Textualization\SentenceTransphormers\Vendor::check(true);"

请注意：如果您已下载英语模型，则需要先将其删除。目前只能使用一个模型，此限制将在未来的版本中取消。

示例

根据上述说明安装SQLite3扩展和Ropherta。

从http://textualization.com/download/phpsemsearch_0.1.tar.bz2（192Mb）下载数据和索引。

解压缩并将文件vector.db和keyword.db移动到根目录。

关键词搜索

顶部文档似乎相当合适。

$ composer run-script query keyword "composer produce time-out on script execution" 
> Composer\Config::disableProcessTimeout
> @php scripts/query.php 'keyword' 'composer produce time-out on script execution'
Search query: compos OR produc OR time OR out OR on OR script OR execut
0. SearchResult[16.874319996013,https://php.ac.cn/manual/en/function.set-time-limit.php 0, 'function set-time-limit']
1. SearchResult[16.699065789091,https://stackoverflow.com/q/365496 0, 'How to keep a php script from timing out because of a long mysql query']
2. SearchResult[15.984700996733,https://stackoverflow.com/q/2439087 0, 'How can I set time limit on get_file_contents in PHP?']
3. SearchResult[15.288043063863,https://stackoverflow.com/q/2443491 0, 'What is considered a long execution time?']
4. SearchResult[14.946966486107,https://stackoverflow.com/q/2690504 0, 'PHP: producing relative date/time from timestamps']
5. SearchResult[14.820039567114,https://stackoverflow.com/q/13955436 0, 'Resume PHP to execution script after exception']
6. SearchResult[14.410651129421,https://stackoverflow.com/q/14040241 0, 'Is there any way I can execute a PHP script from MySQL?']
7. SearchResult[14.406441765697,https://stackoverflow.com/q/3110235 0, 'php garbage collection while script running']
8. SearchResult[14.175007211438,https://stackoverflow.com/q/4765107 0, 'Can you figure out this PHP timing issue?']
9. SearchResult[13.918155042184,https://php.ac.cn/manual/en/function.time-sleep-until.php 0, 'function time-sleep-until']
10. SearchResult[13.677310963332,https://stackoverflow.com/q/2202355 0, 'Set maximum execution time for exec() specifically']
11. SearchResult[13.537783397747,https://stackoverflow.com/q/1194857 0, 'How to schedule the execution of a PHP script on the server side?']
12. SearchResult[13.527986155755,https://stackoverflow.com/q/2128619 0, 'Run Java class file from PHP script on a website']
13. SearchResult[13.371804613541,https://stackoverflow.com/q/11786734 0, 'PHP readfile() and large files']
14. SearchResult[13.354790819156,https://stackoverflow.com/q/5947345 0, 'PHP backup script timing out']
15. SearchResult[13.336357456153,https://stackoverflow.com/q/22817670 0, 'PHP: maximum execution time when importing .SQL data file']
16. SearchResult[13.238850536268,https://stackoverflow.com/q/4501876 0, 'How to get the execution time of a MySQL query from PHP?']
17. SearchResult[13.181655818318,https://stackoverflow.com/q/145402 0, 'Can you recommend Performance Analysis tools for PHP?']
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21. SearchResult[12.948078367259,https://stackoverflow.com/q/437716 0, 'High-quality PDF to Word conversion in PHP?']
22. SearchResult[12.923362029257,https://stackoverflow.com/q/16699549 0, 'What happens if you edit a php script while an instance of it is running?']
23. SearchResult[12.914359255007,https://stackoverflow.com/q/9468332 0, 'How can I find out which PHP script a process is running in Linux?']
24. SearchResult[12.897400839699,https://stackoverflow.com/q/6263443 0, 'PDO Connection Test']
25. SearchResult[12.860367898878,https://stackoverflow.com/q/60232298 0, 'In PHP: what is the difference between "return", "yield", "yield from" and mixing both yield and return in same function?']
26. SearchResult[12.813708107511,https://stackoverflow.com/q/9562124 0, 'PHP MySQL set Connection Timeout']
27. SearchResult[12.763582642154,https://stackoverflow.com/q/5638484 0, 'How can I set the maximum execution time for a PHP script?']
28. SearchResult[12.564669201144,https://stackoverflow.com/q/7036767 0, 'How can I get infinite maximum execution time with PHP?']
29. SearchResult[12.552748367252,https://stackoverflow.com/q/8562398 0, 'Get max_execution_time in PHP script']
30. SearchResult[12.457255454068,https://stackoverflow.com/q/4869611 0, 'Fatal error: Maximum execution time of 0 seconds exceeded']
31. SearchResult[12.376381360159,https://stackoverflow.com/q/15776400 0, 'make script execution to unlimited']
32. SearchResult[12.369739483738,https://php.ac.cn/manual/en/features.commandline.usage.php 0, 'features commandline usage']
33. SearchResult[12.301485848315,https://stackoverflow.com/q/13751772 0, 'PHP output buffer not flushing']
34. SearchResult[12.287292912835,https://php.ac.cn/manual/en/luasandbox.pauseusagetimer.php 0, 'luasandbox pauseusagetimer']
35. SearchResult[12.274118332228,https://stackoverflow.com/q/16933606 0, 'error_reporting(E_ALL) does not produce an error']
36. SearchResult[12.216750396196,https://stackoverflow.com/q/13352388 0, 'Running php script as cron job - timeout issues?']
37. SearchResult[12.20860917016,https://stackoverflow.com/q/7680572 0, 'Fatal error: Maximum execution time of 300 seconds exceeded']
38. SearchResult[12.174936958789,https://php.ac.cn/manual/en/features.file-upload.common-pitfalls.php 0, 'features file-upload common-pitfalls']
39. SearchResult[12.159400224308,https://stackoverflow.com/q/9087883 0, 'Reading a Git commit message from PHP']
40. SearchResult[12.098897569281,https://stackoverflow.com/q/740954 0, 'Does sleep time count for execution time limit?']
41. SearchResult[11.979302316362,https://stackoverflow.com/q/20471736 0, 'Gateway Time-out:The gateway did not receive a timely response from the upstream server']
42. SearchResult[11.910314436649,https://stackoverflow.com/q/535020 0, 'Tracking the script execution time in PHP']
43. SearchResult[11.907291503573,https://stackoverflow.com/q/6853057 0, 'Best way to periodically execute a PHP script?']
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45. SearchResult[11.812067390316,https://php.ac.cn/manual/en/function.getlastmod.php 0, 'function getlastmod']
46. SearchResult[11.758600404801,https://stackoverflow.com/q/4717167 0, 'How to keep a persistent PHP script running?']
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49. SearchResult[11.603155219238,https://stackoverflow.com/q/35681947 0, 'How to get PHP max_execution_time from the command line?']

向量搜索

不如关键词搜索好，但结果确实不同。当搜索相似文档而不是针对文档的查询时，使用对称嵌入器（如Sentence RoBERTa）进行向量搜索效果更好。在这种情况下，HyDE（如下所述）更合适。另一种选择是将非对称嵌入器（如InstructOR）通过ONNX移植到PHP。

$ composer run-script query vector "How to stop composer giving a time-out on a script execution" 
> Composer\Config::disableProcessTimeout
> @php scripts/query.php 'vector' 'How to stop composer giving a time-out on a script execution'
0. SearchResult[-0.51090812683105,https://php.ac.cn/manual/en/function.oci-bind-by-name.php 14, 'function oci-bind-by-name']
1. SearchResult[-0.5215368270874,https://php.ac.cn/manual/en/parle.examples.parser.php 5, 'parle examples parser']
2. SearchResult[-0.52460688352585,https://php.ac.cn/manual/en/mysqli-result.fetch-fields.php 4, 'mysqli-result fetch-fields']
3. SearchResult[-0.54987502098083,https://php.ac.cn/manual/en/function.stream-filter-register.php 3, 'function stream-filter-register']
4. SearchResult[-0.55469918251038,https://stackoverflow.com/q/56757578 3, 'Composer fails with kylekatarnls/update-helper on new homestead']
5. SearchResult[-0.5561431646347,https://php.ac.cn/manual/en/function.oci-get-implicit-resultset.php 7, 'function oci-get-implicit-resultset']
6. SearchResult[-0.55869328975677,https://php.ac.cn/manual/en/function.eio-event-loop.php 1, 'function eio-event-loop']
7. SearchResult[-0.56037712097168,https://php.ac.cn/manual/en/function.sem-acquire.php 1, 'function sem-acquire']
8. SearchResult[-0.56422245502472,https://php.ac.cn/manual/en/function.imagegetclip.php 1, 'function imagegetclip']
9. SearchResult[-0.56469792127609,https://php.ac.cn/manual/en/function.ps-begin-pattern.php 1, 'function ps-begin-pattern']
10. SearchResult[-0.56800973415375,https://php.ac.cn/manual/en/book.com.php 2, 'book com']
11. SearchResult[-0.57436245679855,https://php.ac.cn/manual/en/function.stripos.php 3, 'function stripos']
12. SearchResult[-0.57600331306458,https://php.ac.cn/manual/en/function.oci-get-implicit-resultset.php 4, 'function oci-get-implicit-resultset']
13. SearchResult[-0.57834851741791,https://stackoverflow.com/q/8251426 0, 'Insert string at specified position']
14. SearchResult[-0.57876354455948,https://php.ac.cn/manual/en/ref.sodium.php 6, 'ref sodium']
15. SearchResult[-0.58007609844208,https://php.ac.cn/manual/en/cubrid.examples.php 4, 'cubrid examples']
16. SearchResult[-0.58233147859573,https://php.ac.cn/manual/en/function.apache-setenv.php 1, 'function apache-setenv']
17. SearchResult[-0.58316200971603,https://stackoverflow.com/q/4788500 0, 'how to monitor the CPU usage of a PHP script']
18. SearchResult[-0.58451473712921,https://php.ac.cn/manual/en/function.mb-ereg-match.php 1, 'function mb-ereg-match']
19. SearchResult[-0.5861394405365,https://stackoverflow.com/q/17060177 0, 'Yii2 dropdown empty option']
20. SearchResult[-0.58631610870361,https://stackoverflow.com/q/40067212 0, 'How to return custom error message from controller method validation']
21. SearchResult[-0.5878199338913,https://php.ac.cn/manual/en/splfileobject.ftruncate.php 1, 'splfileobject ftruncate']
22. SearchResult[-0.58884918689728,https://php.ac.cn/manual/en/function.checkdnsrr.php 1, 'function checkdnsrr']
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26. SearchResult[-0.59584921598434,https://php.ac.cn/manual/en/event.examples.php 13, 'event examples']
27. SearchResult[-0.59764385223389,https://php.ac.cn/manual/en/mysqli-stmt.sqlstate.php 3, 'mysqli-stmt sqlstate']
28. SearchResult[-0.59767037630081,https://php.ac.cn/manual/en/function.ldap-mod_del-ext.php 1, 'function ldap-mod_del-ext']
29. SearchResult[-0.59767037630081,https://php.ac.cn/manual/en/function.ldap-mod_replace-ext.php 1, 'function ldap-mod_replace-ext']
30. SearchResult[-0.59767037630081,https://php.ac.cn/manual/en/function.ldap-mod_add-ext.php 1, 'function ldap-mod_add-ext']
31. SearchResult[-0.59810423851013,https://php.ac.cn/manual/en/reflectionparameter.isarray.php 1, 'reflectionparameter isarray']
32. SearchResult[-0.59845781326294,https://php.ac.cn/manual/en/function.mb-ereg-search.php 1, 'function mb-ereg-search']
33. SearchResult[-0.60006403923035,https://php.ac.cn/manual/en/event.examples.php 23, 'event examples']
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37. SearchResult[-0.60857331752777,https://php.ac.cn/manual/en/function.ps-begin-template.php 3, 'function ps-begin-template']
38. SearchResult[-0.60899668931961,https://php.ac.cn/manual/en/class.random-randomerror.php 1, 'class random-randomerror']
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41. SearchResult[-0.60899668931961,https://php.ac.cn/manual/en/class.mongodb-driver-exception-invalidargumentexception.php 1, 'class mongodb-driver-exception-invalidargumentexception']
42. SearchResult[-0.60899668931961,https://php.ac.cn/manual/en/class.outofrangeexception.php 1, 'class outofrangeexception']
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重排

结合关键词和向量。应该更精确。

$ composer run-script query reranked "How to stop composer giving a time-out on a script execution" 
> Composer\Config::disableProcessTimeout
> @php scripts/query.php 'reranked' 'How to stop composer giving a time-out on a script execution'
Search query: how OR to OR stop OR compos OR give OR a OR time OR out OR on OR script OR execut
0. SearchResult[-0.61479258537292,https://stackoverflow.com/q/10520390 0, 'Stop script execution upon notice/warning']

HyDE

使用此功能需要OpenAI API密钥。它可以通过文件、环境变量或直接在构造函数中传递。请注意，调用OpenAI非常慢。在这个例子中，ChatGPT文本将向量搜索推向了某些不一定理想的方向。更短的文字可能更好。

$ composer run-script query '{"class": "\\Textualization\\SemanticSearch\\VectorHydeIndex", "completion":{"open_ai_key":"/path/to/key"}}' "How to stop composer giving a time-out on a script execution" 
> Composer\Config::disableProcessTimeout
> @php scripts/query.php '{"class": "\\Textualization\\SemanticSearch\\VectorHydeIndex", "completion":{"open_ai_key":"/path/to/key"}}' 'How to stop composer giving a time-out on a script execution'
Hdydrated query: There are several ways to prevent Composer from timing out during script execution:

1. Increase the timeout limit: By default, Composer has a timeout limit of 300 seconds (5 minutes). You can increase this limit by modifying the `max_execution_time` directive in your PHP configuration file (php.ini). Set it to a higher value, such as 600 (10 minutes) or more, depending on your script's requirements.

2. Optimize your script: If your script is taking too long to execute, consider optimizing it to reduce the execution time. Analyze your code and identify any bottlenecks or areas that can be improved. Use efficient algorithms, avoid unnecessary loops or recursive calls, and optimize database queries if applicable.

3. Split your script into smaller tasks: If your script performs multiple tasks, consider breaking it down into smaller tasks and executing them separately. This way, you can avoid hitting the timeout limit by completing each task within the allowed time frame.

4. Use command-line execution: Instead of running the script through a web server, you can execute it via the command line. Command-line execution typically has a longer timeout limit compared to web server execution. You can run the script using the `php` command followed by the script's file path.

5. Increase memory limit: If your script requires more memory to execute, you can increase the memory limit in your PHP configuration file (php.ini). Modify the `memory_limit` directive and set it to a higher value, such as 256M or more, depending on your script's memory requirements.

6. Use caching: If your script performs repetitive or resource-intensive tasks, consider implementing caching mechanisms. Caching can help reduce the execution time by storing and retrieving precomputed or frequently accessed data instead of recalculating it every time.

7. Use asynchronous processing: If your script involves time-consuming operations, consider using asynchronous processing techniques. Instead of waiting for each operation to complete before moving to the next, you can execute them concurrently or in the background using tools like queues, workers, or event-driven architectures.

Remember to restart your web server or PHP service after making changes to the PHP configuration file for the changes to take effect.
0. SearchResult[-0.42923119664192,https://stackoverflow.com/q/8707339 4, 'Sharing variables between child processes in PHP?']
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获取文档

给定一个URL和块编号，fetch脚本就能搞定。

$ composer run-script fetch vector https://stackoverflow.com/q/2077576 2
> @php scripts/fetch.php 'vector' 'https://stackoverflow.com/q/2077576' '2'
URL: https://stackoverflow.com/q/2077576
Chunk: 2
Title: PHP & mySQL: When exactly to use htmlentities?
Offset-start: 2169
Offset-end: 3238
Section: StackOverlow
License: CC-BY-SA-3.0
Text:
 <p>I thought it might help to add some more specific details of a specific situation here. Consider that there is a 'Preview' page. Now when I submit the input from a textarea, the Preview page receives the input and shows it html and at the same time, a hidden input collects this input. When the submit button on the Preview button is hit, then the data from the hidden input is POST'ed to a new page and that page inserts the data contained in the hidden input, into the DB. If I do not apply htmlentities when the form is initially submitted (but apply only strip_tags and mysql_real_escape_string) and there's a malicious input in the textarea, the hidden input is broken and the last few characters of the hidden input visibly seen as  <code>" /&gt;</code> on the page, which is undesirable. So keeping this in mind, I need to do something to preserve the integrity of the hidden input properly on the Preview page and yet collect the data in the hidden input so that it does not break it. How do I go about this? Apologize for the delay in posting this info.</p>

注意，关键字index是未分块的（所有块编号都是0）。

索引文件

文档以本文件顶部描述的格式提供的JSONL文件形式提供。

一个示例文件可供下载。

$ composer run-script index keyword sophp.jsonl
$ composer run-script index vector sophp.jsonl

要使用重新排序的索引，分别创建向量和关键字索引。

向量索引大约需要一天时间，并且目前消耗大量的RAM。

分块文件

递归分块器可以单独使用

$ composer run-script chunk ropherta null 1024 tests/sornd1000.jsonl output.jsonl

输出的JSONL文档有键

  • 标题（《title》）
  • 文本（《text》）
  • URL（《url》）
  • 块编号（《chunk_num》）
  • 偏移开始（《offset_start》）
  • 偏移结束（《offset_end》）
  • 许可（《license》）

其他分词器也是可能的，请参阅“scripts”文件夹中的代码。使用字符串《null》（n-u-l-l）将大小设置为字符而不是标记。

使用自定义ONNX模型计算嵌入

$ composer run-script embed /path/to/model.onnx "actual text to compute embeddings"

HyDE评级文件

要使用补全服务（如Open AI ChatGPT）扩展答案，请使用

$ composer run-script hydrate /path/to/open-ai-key 1024 tests/sornd1000.jsonl output.jsonl

它从JSON对象的《title》字段填充《completion》字段。

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