Use PHP extension trie_filter to filter Chinese sensitive words

1. Install libiconv, which is a dependency of libdatrie

wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.14.tar.gz 
tar zxvf libiconv-1.14.tar.gz 
cd libiconv-1.14
./configure 
make 
make install

2. Install: libdatrie (http://linux.thai.net/~thep/datrie/datrie.html#Download)

tar zxf libdatrie-0.2.4.tar.gz   
cd libdatrie-0.2.4  
./configure --prefix=/usr/local   
make   
make install

Compilation error trietool.c:125: undefined reference to `libiconv'

The solution is: ./configure LDFLAGS=-L/usr/local/lib LIBS=-liconv

3. Install the trie_filter extension

Since the official trie_filter extension does not support Chinese very well, I found an extension on git that was rewritten on the official extension and has been tested without any problems

The installation method is as follows:

https://github.com/wulijun/php-ext-trie-filter Download the source code package here

phpize
./configure --with-php-config=/usr/local/bin/php-config 
make
make install

4. Modify the php.ini file and add the trie_filter extension :extension=trie_filter.so, restart PHP.

Check phpinfo and find that the trie_filter extension is available, as shown in the following figure:

5. Generate a dictionary for word detection, because it is not included in the source code package downloaded above. It has a command to generate a dictionary, so you also need to download the official source code package

(https://code.google.com/p/as3chat/downloads/detail?name=trie_filter-2011-03-21.tar. gz)

tar zxf trie_filter-2011.03.21.tar.gz   
cd trie_filter-2011.03.21    
gcc -o dpp dpp.c -ldatrie // 生成dpp命令用语编译词典 
./dpp words.txt words.dic  //将words.txt 编译成trie_filter使用的词典 words.txt中每个词占一行

Error when generating dictionary: ./dpp: error while loading shared libraries: libdatrie.so.1: cannot open shared object file: No such file or directory

Solution : Execute

ldconfig

and then execute

./dpp words.txt words.dic

6. Test:

<!--?php 
/**
 * trie_filter 敏感词过滤示例
 * 
 **/ 
   
// 载入词典，成功返回一个 Trie_Filter 资源句柄，失败返回 NULL 
$file = trie_filter_load(&#39;./words.dic&#39;); 
var_dump($file); 
$str1 = &#39;今天利用trie_filter做敏感词过滤示例&#39;; 
$str2 = &#39;今天利用trie_filter做过滤示例&#39;; 
// 检测文本中是否含有词典中定义的敏感词(假设敏感词设定为：‘敏感词’) 
$res1 = trie_filter_search_all($file, $str1);  // 一次把所有的敏感词都检测出来
$res2 = trie_filter_search($file, $str2);// 每次只检测一个敏感词 
var_dump($res1); 
echo "<br/-->"; 
var_dump($res2);
trie_filter_free($file); //最后别忘记调用free

It is recommended to use php 5.3.3 or above version, I Using 5.3.3

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