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PHP使用json_encode函数时不转义中文的解决方法_php技巧

May 16, 2016 pm 08:32 PM
php Chinese escape

本文实例讲述了PHP使用json_encode函数时不转义中文的解决方法。分享给大家供大家参考。具体方法如下:

json_encode函数对于gbk中的中文字符是不会转换的或直接转换成空格了,本文就来给各位整理一个关于json不转义中文问题处理技巧,相信对大家有所帮助。

如果你调用 PHP 自带的 json_encode() 函数, 碰到中文时, 中文会被转义掉. 例如:

复制代码 代码如下:
echo json_encode(array('你好'));
// 输出: ["\u4f60\u597d"]

这非常恼人, 像是一堆乱码, JSON 标准从来没有说要把非 ASCII 字符转义, 标准说的是”Any UNICODE character”.
如何禁用掉这种转义呢? 答案是, PHP 自带的 json_encode() 不能禁用这个特性(在 5.4.0 版本之前, 之后的版本你可以加 JSON_UNESCAPED_UNICODE 选项), 你只能换一个新的 JSON 库. 为了简单, 我简单写了几十行代码, 实现一个 json_encode().
复制代码 代码如下:
class Util
{
    static function json_encode($input){
        // 从 PHP 5.4.0 起, 增加了这个选项.
        if(defined('JSON_UNESCAPED_UNICODE')){
            return json_encode($input, JSON_UNESCAPED_UNICODE);
        }
        if(is_string($input)){
            $text = $input;
            $text = str_replace('\\', '\\\\', $text);
            $text = str_replace(
                array("\r", "\n", "\t", "\""),
                array('\r', '\n', '\t', '\\"'),
                $text);
            return '"' . $text . '"';
        }else if(is_array($input) || is_object($input)){
            $arr = array();
            $is_obj = is_object($input) || (array_keys($input) !== range(0, count($input) - 1));
            foreach($input as $k=>$v){
                if($is_obj){
                    $arr[] = self::json_encode($k) . ':' . self::json_encode($v);
                }else{
                    $arr[] = self::json_encode($v);
                }
            }
            if($is_obj){
                return '{' . join(',', $arr) . '}';
            }else{
                return '[' . join(',', $arr) . ']';
            }
        }else{
            return $input . '';
        }
    }
}

考虑不到的地方, 例如判断关联数组(is_obj)的地方, 遇到问题再说. 你要是不喜欢类, 那就自己转成纯函数, 换个名字吧。

希望本文所述对大家的PHP程序设计有所帮助。

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