php實現的返回數據格式化類實例

 DataReturn.class.php類文件如下：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 <?php  /** 返回數據格式化類  *  Date:  2011-08-15  *  Author: fdipzone  */      class DataReturn{  // class start        private $type;    private $xmlroot;    private $callback;    private $returnData;        public function __construct($param=array()){      $this->type = $this->exists($param,'type')? strtoupper($param['type']) : 'JSON';   // 類型 JSON,XML,CALLBACK,ARRAY      $this->xmlroot = $this->exists($param,'xmlroot')? $param['xmlroot'] : 'xmlroot';   // xml root dom name      $this->callback = $this->exists($param,'callback')? $param['callback'] : '';     // JS callback function name          $format = array();      $format['retcode'] = $this->exists($param,'format.retcode')? $param['format']['retcode'] : 'retcode';//retcode 對應名稱      $format['msg'] = $this->exists($param,'format.msg')? $param['format']['msg'] : 'msg';        //msg 對應名稱      $format['data'] = $this->exists($param,'format.data')? $param['format']['data'] : 'data';      //data 對應名稱          $result = array();      $result[$format['retcode']] = $this->exists($param,'retcode')? $param['retcode'] : 0;      $result[$format['msg']] = $this->exists($param,'msg')? $param['msg'] : '';      $result[$format['data']] = $this->exists($param,'data')? $param['data'] : '';          $this->returnData = $result;    }        //輸出數據    public function data_return(){      ob_clean();      switch($this->type){        case 'JSON':          $this->json_return();          break;        case 'XML':          $this->xml_return();          break;        case 'CALLBACK':          $this->callback_return();          break;        case 'ARRAY':          $this->array_return();          break;        default:          $this->json_return();      }      exit();    }        //輸出JSON格式數據,如有callback參數則返回JSONP格式    private function json_return(){      header('content-type:text/html;charset=utf-8');      if(empty($this->callback)){        echo json_encode($this->returnData);      }else{        echo $this->callback.'('.json_encode($this->returnData).');';      }    }        //輸出XML格式數據    private function xml_return(){      header('content-type:text/xml;charset=utf-8');      echo $this->xml_encode($this->returnData,$this->xmlroot);    }        //輸出JSON格式數據，並調用callback方法    private function callback_return(){      header('content-type:text/html;charset=utf-8');      $this->callback = empty($this->callback)? 'callback' : $this->callback;      echo "<script type="text/javascript">rn";      echo $this->callback."(".json_encode($this->returnData).");rn";      echo "</script>";    }&n