php权重计算方法代码分享

代码如下:
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
// +------------------------------------------------------------------------
//  Name       :   权重计算                                        
//  Description:   稍加修改，亦可用于分词，词频统计，全文检索和垃圾检测
//  Date       :   2013/12/16 08:51

class weight {
    protected $aDict = array(array());
    protected $aItems = array();
    protected $sLastRule;
    protected $aMatchs = array();
    protected $aShow = array();

 private function init() {
  //清空记录的匹配表和输出结果
  unset($this->aShow);
 }

    public function newItems($mItems) {
  //导入新的项目
  $this->aItems = (is_array($mItems))? $mItems: array($mItems);
  $this->init();
 }

 public function newTable(array $aTable) {
        //导入新的对照表，并生成字典
        foreach($aTable as $iTableKey=>$sTableLine) {
            $aTableLine = explode(',', str_replace('|', ',', $sTableLine));
            $setter = function($v, $k, $paraMeter) {
                $k1 = $paraMeter[0]; $oWeight = $paraMeter[1];
                $oWeight->genDict($v, $k1);
            };
            array_walk($aTableLine, $setter, array($iTableKey, $this));
        }
        $this->init();
 }

    public function getShow($sRule = 'max') {
  //获取最终的显示结果
        if(empty($this->aItems) || empty($this->aDict))
            return array();
  if (empty($this->aShow) || $sRule != $this->sLastRule)
            return $this->genShow($sRule);
        return $this->aShow;
 }

    public function genShow($sRule) {
        $aShow = array();