本文实例讲述了php实现的中文分词类。分享给大家供大家参考，具体如下：
具体代码如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
class Segmentation { var $options = array('lowercase' => TRUE, 'segment_english' => FALSE); var $dict_name = 'Unknown'; var $dict_words = array(); function setLowercase($value) { if ($value) { $this->options['lowercase'] = TRUE; } else { $this->options['lowercase'] = FALSE; } return TRUE; } function setSegmentEnglish($value) { if ($value) { $this->options['segment_english'] = TRUE; } else { $this->options['segment_english'] = FALSE; } return TRUE; } function load($dict_file) { if (!file_exists($dict_file)) { return FALSE; } $fp = fopen($dict_file, 'r'); $temp = fgets($fp, 1024); if ($temp === FALSE) { return FALSE; } else { if (strpos($temp, "\t") !== FALSE) { list ($dict_type, $dict_name) = explode("\t", trim($temp)); } else { $dict_type = trim($temp); $dict_name = 'Unknown'; } $this->dict_name = $dict_name; if ($dict_type !== 'DICT_WORD_W') { return FALSE; } } while (!feof($fp)) { $this->dict_words[rtrim(fgets($fp, 32))] = 1; } fclose($fp); return TRUE; } function getDictName() { return $this->dict_name; } function segmentString($str) { if (count($this->dict_words) === 0) { return FALSE; } $lines = explode("\n", $str); return $this->_segmentLines($lines); } function segmentFile($filename) { if (count($this->dict_words) === 0) { return FALSE; } $lines = file($filename); return $this->_segmentLines($lines); } function _segmentLines($lines) { $contents_segmented = ''; foreach ($lines as $line) { $contents_segmented .= $this->_segmentLine(rtrim($line)) . " \n"; } do { $contents_segmented = str_replace(' ', ' ', $contents_segmented); } while (strpos($contents_segmented, ' ') !== FALSE); return $contents_segmented; } function _segmentLine($str) { $str_final = ''; $str_array = array(); $str_length = strlen($str); if ($str_length > 0) { if (ord($str{$str_length-1}) >= 129) { $str .= ' '; } } for ($i=0; $i<$str_length; $i++) { if (ord($str{$i}) >= 129) { $str_array[] = $str{$i} . $str{$i+1}; $i++; } else { $str_tmp = $str{$i}; for ($j=$i+1; $j<$str_length; $j++) { if (ord($str{$j}) < 129) { $str_tmp .= $str{$j}; } else { break; } } $str_array[] = array($str_tmp); $i = $j - 1; } } $pos = count($str_array); while ($pos > 0) { $char = $str_array[$pos-1]; if (is_array($char)) { $str_final_tmp = $char[0]; if ($this->options['segment_english']) { $str_final_tmp = preg_replace("/([\!\"\#\$\%\&\'\(\)\*\+\,\-\.\/\:\;\<\=\>\?\@\[\\\\\]\^\_\`\{\|\}\~\t\f]+)/", " $1 ", $str_final_tmp); $str_final_tmp = preg_replace("/([\!\"\#\$\%\&\'\(\)\*\+\,\-\.\/\:\;\<\=\>\?\@\[\\\\\]\^\_\`\{\|\}\~\t\f])([\!\"\#\$\%\&\'\(\)\*\+\,\-\.\/\:\;\<\=\>\?\@\[\\\\\]\^\_\`\{\|\}\~\t\f])/", " $1 $2 ", $str_final_tmp); } if ($this->options['lowercase']) { $str_final_tmp = strtolower($str_final_tmp); } $str_final = " $str_final_tmp$str_final"; $pos--; } else { $word_found = 0; $word_array = array(0 => ''); if ($pos < 4) { $word_temp = $pos + 1; } else { $word_temp = 5; } for ($i=1; $i<$word_temp; $i++) { $word_array[$i] = $str_array[$pos-$i] . $word_array[$i-1]; } for ($i=($word_temp-1); $i>1; $i--) { if (array_key_exists($word_array[$i], $this->dict_words)) { $word_found = $i; break; } } if ($word_found) { $str_final = " $word_array[$word_found]$str_final"; $pos = $pos - $word_found; } else { $str_final = " $char$str_final"; $pos--; } } } return $str_final; }}?> |
希望本文所述对大家PHP程序设计有所帮助。
