php实现的中文分词类完整实例

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：该中文分词类源

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：

该中文分词类源码使用http://tools.jb51.net/code/jb51_php_format进行了格式化处理，便于阅读。具体代码如下：

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;
 }
}
?>

php 中文 分词