如何随机化 json答案

【问题标题】：How to randomize json如何随机化 json
【发布时间】：2021-01-24 15:36:20
【问题描述】：

我有一个 randquotes.json 文件

{
    "author": "William Shakespeare",
    "quotes": "A brave flea is a flea that can dare to get its breakfast on the lips of a lion."
},
{
    "author": "Winston Churchill",
    "quotes": "We live with what we get, but we bring life to what we give."
},
{
    "author": "Wolfgang von Gothe",
    "quotes": "Knowledge is not enough, we must practice it. Intention is not enough, we must do it."
}

然后我想用php随机生成“作者”和“引号”

怎么样？感谢帮助

【问题讨论】：

你的意思是你想随机选择这些引号之一吗？
是的，我该怎么做？
能否先提供有效的JSON
你不知道：JSON 是实际事物的字符串表示，所以随机化 那些事物，然后将其转换为 JSON。

标签： php json random

【解决方案1】：

假设您实际上有一个有效的 JSON 字符串...

使用json_decode()将json转换为PHP数据类型
找出数组有多大
生成一个介于 0 和数组大小之间的随机数
返回该数组出现，我再次使用json_encode() 将其作为json 字符串执行

$json_string = '
[
    {
        "author": "William Shakespeare",
        "quotes": "A brave flea is a flea that can dare to get its breakfast on the lips of a lion."
    },
    {
        "author": "Winston Churchill",
        "quotes": "We live with what we get, but we bring life to what we give."
    },
    {
        "author": "Wolfgang von Gothe",
        "quotes": "Knowledge is not enough, we must practice it. Intention is not enough, we must do it."
    }
]';

$arr = json_decode($json_string);

// How big is the array
$max = count($arr) -1;

$rand_idx = rand(0, $max);
echo json_encode($arr[$rand_idx]);

【讨论】：