php实现的返回数据格式化类实例_php技巧

type = $this->exists($param,'type')? strtoupper($param['type']) : 'JSON';   // 类型 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 对应名称     $format['msg'] = $this->exists($param,'format.msg')? $param['format']['msg'] : 'msg';        //msg 对应名称     $format['data'] = $this->exists($param,'format.data')? $param['format']['data'] : 'data';      //data 对应名称      $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 = $result;   }    //输出数据   public function data_return(){     ob_clean();     switch($this->type){       case <b>6本文来源gao@dai!ma.com搞$代^码!网7</b><pre>搞gaodaima代码

‘JSON’: $this->json_return(); break; case ‘XML’: $this->xml_return(); break; case ‘CALLBACK’: $this->callback_return(); break; case ‘ARRAY’: $this->array_return(); break; default: $this->json_return(); } exit(); } //输出JSON格式数据,如有callback参数则返回JSONP格式 private function json_return(){ header(‘content-type:text/html;charset=utf-8’); if(empty($this->callback)){ echo json_encode($this->returnData); }else{ echo $this->callback.'(‘.json_encode($this->returnData).’);’; } } //输出XML格式数据 private function xml_return(){ header(‘content-type:text/xml;charset=utf-8’); echo $this->xml_encode($this->returnData,$this->xmlroot); } //输出JSON格式数据，并调用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\”>\r\n”; echo $this->callback.”(“.json_encode($this->returnData).”);\r\n”; echo “</script>”; } //输出数组格式数据 private function array_return(){ header(‘content-type:text/html;charset=utf-8’); echo ‘

';     print_r($this->returnData);     echo '

‘; } //XML编码 private function xml_encode($data, $root=’xmlroot’, $encoding=’utf-8′) { $xml = “\n”; $xml.= “\n”; $xml.= $this->data_to_xml($data); $xml.= “”; return $xml; } //数组转XML格式 private function data_to_xml($data) { if (is_object($data)) { $data = get_object_vars($data); } $xml = ”; foreach ($data as $key => $val) { is_numeric($key) && $key = “item id=\”$key\””; $xml.=””; $xml.= ( is_array($val) || is_object($val)) ? $this->data_to_xml($val) : $this->cdata($val); list($key, ) = explode(‘ ‘, $key); $xml.=”\n”; } return $xml; } //判断数据是否存在 private function exists($obj,$key=”){ if($key==”){ return isset($obj) && !empty($obj); }else{ $keys = explode(‘.’,$key); for($i=0,$max=count($keys); $i<$max; $i++){ if(isset($obj[$keys[$i]])){ $obj = $obj[$keys[$i]]; }else{ return false; } } return isset($obj) && !empty($obj); } } //判断是否需要加上标记 private function cdata($val){ if(!empty($val) && !preg_match(‘/^[A-Za-z0-9+$]/’,$val)){ $val = ”; } return $val; } } // class end ?>