PHP JSON 封装

public function printJson($data, $jsonCallBack='' ,$fromCode="UTF-8")
{
	mb_convert_variables("UTF8", $fromCode, $data);
	header("Cache-Control: no-cache, no-store, must-revalidate, max-age=-1");
	header("Content-Type: application/json; charset=utf-8");
	$outPut = function_exists('json_encode') ? json_encode($data) : CJSON::encode($data);
	if( '' != $jsonCallBack){
		$outPut = $jsonCallBack . '(' . $outPut . ')';
	}
	echo $outPut;
	Yii::app()->end();
}

如果json字符串的key缺少双引括起来，则json_decode会失败,判断是否存在缺少双引括起来的key，如缺少则先用正则替换为"key"，再进行json_decode操作

<?php
/** 兼容key没有双引括起来的JSON字符串解析
* @param String $str JSON字符串
* @param boolean $mod true:Array,false:Object
* @return Array/Object
*/
function ext_json_decode($str, $mode=false){
  if(preg_match('/\w:/', $str)){
    $str = preg_replace('/(\w+):/is', '"$1":', $str);
  }
  return json_decode($str, $mode);
}
 
$str1 = '{name:"fdipzone"}';
var_dump(ext_json_decode($str1, true)); // array(1) { ["name"]=> string(8) "fdipzone" }
?>

  Json只支持 utf-8 编码,所有用header

<?php
/**************************************************************
 *
 * 使用特定function对数组中所有元素做处理
 * @param    string    &$array        要处理的字符串
 * @param    string    $function    要执行的函数
 * @return boolean    $apply_to_keys_also        是否也应用到key上
 * @access public
 *
 *************************************************************/
function arrayRecursive(&$array, $function, $apply_to_keys_also = false) {
    static $recursive_counter = 0;
    if (++$recursive_counter > 1000) {
        die('possible deep recursion attack');
    }
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            arrayRecursive($array[$key], $function, $apply_to_keys_also);
        } else {
            $array[$key] = $function($value);
        }

        if ($apply_to_keys_also && is_string($key)) {
            $new_key = $function($key);
            if ($new_key != $key) {
                $array[$new_key] = $array[$key];
                unset($array[$key]);
            }
        }
    }
    $recursive_counter--;
}

/**************************************************************
 *
 * 将数组转换为JSON字符串（兼容中文）
 * @param    array    $array        要转换的数组
 * @return string        转换得到的json字符串
 * @access public
 *
 *************************************************************/
function JSON($array) {
    arrayRecursive($array, 'urlencode', true);
    $json = json_encode($array);
    return urldecode($json);
}
$array = array(
    'Name' => '希亚',
    'Age' => 20
);
header("Cache-Control: no-cache, no-store, must-revalidate, max-age=-1");
header("Content-Type: application/json; charset=utf-8");
echo JSON($array);
echo "<br/>";
print_r(json_decode(JSON($array)));

echo "<br/>------default------<br/>";
$tt = json_encode($array);
print_r($tt);
echo "<br/>";
exit(json_decode($tt));
?>

{"Name":"希亚","Age":"20"}
stdClass Object ( [Name] => 希亚 [Age] => 20 )
------default------
{"Name":"\u5e0c\u4e9a","Age":20}
stdClass Object ( [Name] => 希亚 [Age] => 20 )

打印json_decode结果  json_decode加了true参数会返回关联数组,否则出现stdClass Object对象