PHP - json没有解析循环

Question

假设我的JSON是这样的:

{
  "achievement": [
    {
      "title": "All Around Submitter",
      "description": "Get one piece of content approved in all six areas.",
      "xp": 500,
      "level_req": 1
    },
    {
      "title": "World-wide Photo Journalist",
      "description": "Get one photo approved in all six areas.",
      "xp": 500,
      "level_req": 1
    },
    {
      "title": "Ready for Work",
      "description": "Sign up and get validated",
      "xp": 50,
      "level_req": 1
    },
    {
      "title": "Asian Pride",
      "description": "Get ten pieces of content approved to a club in an Asian nation.",
      "xp": 1500,
      "level_req": 1
    }
  ]
}

我的PHP代码是这样的,所以我加载了json文件...:

<?php

$string = file_get_contents("achievements.json");
$json_a=json_decode($string,true);

foreach ($json_a as $key => $value){
  echo  $value[0]['title'] . " <br />";
}

?>

但是它只输出第一个数组.我知道.只有1.但foreach循环怎么样？为什么不是每行循环？

Answer 1

您正在遍历顶级数组,该数组只有一个键: achievement

相反,你应该

foreach ($json_a['achievement'] as $key => $value){
  echo  $value['title'] . " <br />";
}

提示:[0]是一种代码味道.