php返回数据格式化类
DataReturn.class.php
<?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,并調用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">
";
echo $this->callback."(".json_encode($this->returnData).");
";
echo "</script>";
}
//輸出數組格式數據
private function array_return(){
header("content-type:text/html;charset=utf-8");
echo "<pre>";
print_r($this->returnData);
echo "</pre>";
}
//XML編碼
private function xml_encode($data, $root="xmlroot", $encoding="utf-8") {
$xml = "<?xml version="1.0" encoding="" . $encoding . ""?>
";
$xml.= "<" . $root . ">
";
$xml.= $this->data_to_xml($data);
$xml.= "</" . $root . ">";
return $xml;
}
//數組轉XML格式
private function data_to_xml($data) {
if (is_object($data)) {
$data = get_object_vars($data);
}
$xml = "";
foreach ($data as $key => $val) {
is_numeric($key) && $key = "item id="$key"";
$xml.="<$key>";
$xml.= ( is_array($val) || is_object($val)) ? $this->data_to_xml($val) : $this->cdata($val);
list($key, ) = explode(" ", $key);
$xml.="</$key>
";
}
return $xml;
}
//判斷數據是否存在
private function exists($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($obj);
}
}
//判斷是否需要加上<![CDATA[]]>標記
private function cdata($val){
if(!empty($val) && !preg_match("/^[A-Za-z0-9+$]/",$val)){
$val = "<![CDATA[".$val."]]>";
}
return $val;
}
} // class end
?>
demo
<?
require_once("DataReturn.class.php");
$param = array( // DataReturn 參數
"type" => "JSON", // 輸出的類型 JSON,XML,CALLBACK,ARRAY 默認為 JSON
"retcode" => "1000", // retcode 的值,默認為0
"msg" => "", // msg 的值,默認為空
"data" => array( // 要輸出的數據
"id" => "100",
"name" => "fdipzone",
"gender" => 1,
"age" => 28
),
"format" => array( // 輸出的數據key格式,默認為 retcode,msg,data
"retcode" => "status",
"msg" => "info",
"data" => "result"
),
"xmlroot" => "xmlroot", // 當type=XML時,XML根節點名稱,默認為xmlroot
"callback" => "callback" /* 回調方法名稱
type=JSON時,默認為空,如不為空,則輸出callback({data});
type=CALLBACK時,默認為callback,自動調用頁面JS回調方法
*/
);
$obj = new DataReturn($param); // 創建DataReturn類對象
$obj->data_return(); // 按格式輸出數據
?>