add search string count feature.

Author: abelzhou

src/TrieTree.php

@@ -29,7 +29,7 @@ public function __construct() {
  * 从树种摘除一个文本
  * @param $str
  */
- public function delete($str,$deltree=false) {
+ public function delete($str, $deltree = false) {
  $str = trim($str);
  $delstr_arr = $this->_convertStrToH($str);
  $len = count($delstr_arr);
@@ -58,9 +58,9 @@ public function delete($str,$deltree=false) {
  }
  $idx = $len - 1;
  //删除整棵树
- if($deltree){
+ if ($deltree) {
  //清空子集
- $del_index[$idx]['index']['child']=array();
+ $del_index[$idx]['index']['child'] = array();
  }
  //只有一个字 直接删除
  if ($idx == 0) {
@@ -216,12 +216,17 @@ public function search($search) {
  if (isset($tree[$search_keys[$i]])) {
  $node = $tree[$search_keys[$i]];
  if ($node['end']) {
-// print_r(PHP_EOL.$i . '+' . PHP_EOL);
- //发现结尾 将原词以及自定义属性纳入返回结果集中
- $hit_arr[md5($node['full'])] = array(
- 'words' => $node['full'],
- 'data' => $node['data']
- );
+ //发现结尾 将原词以及自定义属性纳入返回结果集中 3.1 增加词频统计
+ $key = md5($node['full']);
+ if (isset($hit_arr[$key])) {
+ $hit_arr[$key]['count'] += 1;
+ } else {
+ $hit_arr[$key] = array(
+ 'words' => $node['full'],
+ 'data' => $node['data'],
+ 'count' => 1
+ );
+ }
  if (empty($node['child'])) {
  //若不存在子集，检索游标还原
  $i = $current_index;