正则匹配引号中间的内容，匹配json的key，替换多维数组的key

青旅半醒 2022-12-01 01:18 151阅读 0赞

正则表达式：

(?<=")[a-z_]+(?=":)

匹配示例：

{ "api_token":"1,32|xxx","identity_token":"1,1598333646,xxx,2","user":{ "nickname":"scsasdad","avatar":"111111","country_code":null,"telephone":"xxx","email":"","language":"zh","last_login_time":xxx,"status":20,"user_id":1,"user_profile":{ "user_id":1,"first_name":"阳","last_name":"","gender":1,"birthday":"1990-09-19","company":"xx科技","industry":"计算机","position":"后端工程师","education":"本科","address":"xx花园","city":"武汉","postcode":"430000","country":"中国"}}}

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poZXpoZWJpZQ_size_16_color_FFFFFF_t_70_pic_center]

我做这个的用途是，有时候不同的接口需要的返回格式不一致，有的需要返回snake键名，有时候需要camlCase键名。具体代码如下：

/** * 蛇形转camel * @author Bruce 2020-08-25 * * @param string $value [description] * @return [type] [description] */
    function snake_to_camel($value = '')
    { 
        $value = ucwords(str_replace(['-', '_'], ' ', $value));
        return lcfirst(str_replace(' ', '', $value));
    }
    
    /** * 多维数组的key变成camelCase * @author Bruce 2020-08-25 * * @param array $result [description] * @return [type] [description] */
    function camel_result($result = [])
    { 
        $result = json_encode($result, 320);
        $new = preg_replace_callback('/(?<=")[a-z_]+(?=":)/', function ($matches) { 
            return snake_to_camel($matches[0]);
        }, $result);
        return json_decode($new, true);
    }

### 多维结果示例： ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poZXpoZWJpZQ_size_16_color_FFFFFF_t_70_pic_center 1]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poZXpoZWJpZQ_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/c8fe4a5966a64035a566e6d094078d31.png