転置インデックス実装例

reversed_index.php

//転置インデックスを作成
$comp_list_reverse = array();
foreach ($comp_list as $key => $value) {
        $hashed = md5($value);
        $comp_list_reverse[$hashed] =  $key;
}
$keyword_name_list_reverse = array();
foreach ($keyword_name_list as $key => $value) {
        $hashed = md5($value);
        $keyword_name_list_reverse[$hashed] = $key;
}
foreach($list AS $data){
  $hashed = md5($data['vc_kw']);
  $comp_list_results = false;
  $keyword_name_list_results = false;
  if (isset($comp_list_reverse[$hashed])) {
          $comp_list_key = $comp_list_reverse[$hashed];
          $comp_list_results = isset($comp_list[$comp_list_key]);
  }
  if ($keyword_name_list_reverse[$hashed]) {
          $keyword_name_list_key = $keyword_name_list_reverse[$hashed];
          $keyword_name_list_results = isset($keyword_name_list[$keyword_name_list_key]);
  }
}