PHP如何将数据写入JSON? [英] php how to write data into json?
问题描述
我是新来的php.我想使php页面缓存，从mysql查询数据并将数据存储为json格式.
I am newer for php. I want make php page cache, query data from mysql and store data into json format.
我有很多问题:
-
我应该存储哪种类型的文件?
.json或.txt或.cache?因为我还需要使用json解码将数据返回到页面中.
which type of file should I store?
.jsonor.txtor.cache? for I also need use json decode return datas into page.
我想使用cron选项卡，进行许多mysql查询并写入一个json文件.我应该选择哪种写代码? fopen, fwrite或file_get_contents或其他命令? (不覆盖数据，而是继续写入.我将删除该文件，并在下一次cron时进行续订)
I want use cron tab, make many mysql queries and write into one json file. what write code should I choose? fopen, fwrite or file_get_contents or other command? (do not cover the data, but continue write. I will deleted the file and renewer it at the next cron time)
如果多次写入json数据(同时10个或更多mysql查询并写入相同的json文件，每个json子格式如{name: ".$row['name']."})，如何完成顶部{和底部}制作标准的json数据格式?
If a multi write into a json data (10 or more mysql query at the same time and write into a same json file, each json child format like {name: ".$row['name']."}), how to completed a top { and bottom } to make a standad json data format?
{////添加方式
{name:.$ row ['name']."}
{name: ".$row['name']."}
{name:.$ row ['name']."}
{name: ".$row['name']."}
//来自另外10个mysql查询的许多名称
// many name from 10 more mysql queries
} //和这个
谢谢.
推荐答案
我应该存储哪种类型的文件
which type of file should I store
没关系.没有固定的扩展名，但是我选择.json只是为了弄清楚文件应该包含什么.
It doesn't matter. There is no fixed extension, but I would pick .json just to make it clear what the file is supposed to contain.
我应该选择哪种写代码?
what write code should I choose?
只需使用 file_put_contents 放置JSON字符串(请参见下一部分)到文件中.
Just use file_put_contents to put the JSON string (see next section) into a file.
每种json子格式，如
each json child format like
您真的不想使用该方法.它可能会工作一段时间，但是当您需要处理引用和特殊字符转义之类的内容时，它会变得非常复杂.与其重新发明轮子，不如使用PHP内置的 JSON函数为此.
You really do not want to use that method. It might work for a while, but becomes very complex when you need to handle things like quoting and special-character escapes. Instead of re-inventing the wheel, use PHP's built-in JSON functions for this.
使用PHP的字符串，数字和数组创建所需的数据结构，然后依靠json_encode将其转换为字符串.
Create the data-structure you want using PHP's strings, numbers, and arrays, and then rely on json_encode to turn it into a string.
要注意的主要事情是，根据您的PHP array()的外观，您可能会得到JSON []与{}的对比.
The main thing to be careful of is that depending on how your php array() looks, you might get JSON [] versus {}.
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