php动态绑定变量的用法

本文实例讲述了php动态绑定变量的用法。分享给大家供大家参考。具体如下：

    private function bindVars($stmt,$params) {
      if ($params != null) {
        $types = ''; //initial sting with types
        foreach($params as $param) {
     //for each element, determine type and add
          if(is_int($param)) {
            $types .= 'i'; //integer
          } elseif (is_float($param)) {
            $types .= 'd'; //double
          } elseif (is_string($param)) {
            $types .= 's'; //string
          } else {
            $types .= 'b';
     //blob and unknown
          }
        }
        $bind_names[] = $types;
     //first param needed is the type string
     // eg: 'issss'
        for ($i=0; $i<count($params);$i++) {
     //go through incoming params and added em to array
          $bind_name = 'bind' . $i;
       //give them an arbitrary name
          $$bind_name = $params[$i];
       //add the parameter to the variable variable
          $bind_names[] = &$$bind_name;
       //now associate the variable as an element in an array
        }
        //call the function bind_param with dynamic params
        call_user_func_array(array($stmt,'bind_param'),$bind_names);
      }
      return $stmt; //return the bound statement

希望本文所述对大家的php程序设计有所帮助。