if ( ! function_exists('sql_dump')) {
  function sql_dump()
  {  
    \DB::listen(function ($sql) {
      $i = 0;
      $bindings = $sql->bindings;
      $rawSql = preg_replace_callback('/\?/', function ($matches) use ($bindings, &$i) {
        $item = isset($bindings[$i]) ? $bindings[$i] : $matches[0];
        $i++;
        return gettype($item) == 'string' ? "'$item'" : $item;
      }, $sql->sql);
      echo $rawSql, "\n<br /><br />\n";
    }); 
  }  
}

DB::connection()->enableQueryLog(); // 打开query log
sql_dump();