PHP unary word segmentation algorithm example code
一元分词:指语句中每个字都成词,按字切分,不去组合,类似英文单词。UTF8编码下一个字符如果首字符ASCII码不大于192则只占1个字节 。如果首字符ASCII码大于192小于224则占用2个字节,否则占用3个字节 ,一元分词需要在mysql的my.ini文件中增加 ft_min_word_len=1
代码如下:
/** * 一元分词算法 * 可以使用mysql查询语句 show variables like '%ft%' 查看mysql全文搜索相关设置 * * @access global * @param string $str * @param boolean $unique 是否去除重复值 * @param boolean $merge 是否合并附加值 * @return array */ function seg_word($str,$unique=false,$merge=true) { $str = trim(strip_tags($str)); $strlen = strlen($str); if($strlen == 0) return array(); $spc = ' '; //按需增加需要过滤的字符 $search = array(',', '/', '\\', '.', ';', ':', '\'', '!', '~','"', '`', '^', '(', ')', '?', '-', "\t", "\n", '\'', '<', '>', "\r", "\r\n", '\$', '&', '%', '#', '@', '+', '=', '{', '}', '[', ']', ')', '(', '.', '。', ',', '!', ';', '“', '”', '‘', ''', '[', ']', '、', '—', ' ', '《', '》', '-', '…', '【', '】',':'); $numpairs = array('1'=>'一','2'=>'二','3'=>'三','4'=>'四','5'=>'五','6'=>'六','7'=>'七','8'=>'八','9'=>'九','0'=>'零'); $str = alab_num($str); $str = str_replace($search,' ',$str); $ord = $i = $k = 0; $prechar = 0;// 0-空白 1-英文和符号 2-中文 $result = array(); $annex = array(); while($ord = ord($str[$i])) { //1字节字符 if ($ord <= 0xC0 ) { //去除空字符串 if($ord < 33) { $prechar=0; $i++; $k++; continue; } //附加中文大写数字转换 if(isset($numpairs[$str[$i]])) { $annex[]=$numpairs[$str[$i]]; } //如果前面是中文 if( $prechar == 2 ){ $result[++$k] = $str[$i]; } else { $result[$k] .= $str[$i]; } $prechar = 1; $i++; } else //2-3字节字符(中文) { if($ord < 0xE0) $step = 2; else $step = 3; $c = substr($str,$i,$step); if(false !== $key = array_search($c,$numpairs)){ $annex[] = $key; } if ($prechar != 0) { $result[++$k] = $c; } else { $result[$k] .= $c; } $prechar = 2; $i+=$step; } } $result = $merge ? array_merge($result,$annex) : $result ; return $unique ? array_unique($result) : $result ; }
The above is the detailed content of PHP unary word segmentation algorithm example code. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

In this chapter, we will understand the Environment Variables, General Configuration, Database Configuration and Email Configuration in CakePHP.

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

To work with date and time in cakephp4, we are going to make use of the available FrozenTime class.

To work on file upload we are going to use the form helper. Here, is an example for file upload.

In this chapter, we are going to learn the following topics related to routing ?

CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

Validator can be created by adding the following two lines in the controller.
