如何在PHP中提取JSON对象中的对象并为其分配正确的索引

我有以下PHP代码（我将发布其中的重要部分）：

因此，我需要解决的基本问题如下：

正确获取项目列表的正确代码是什么 我的

Users.json

文件中每个对象内部的“指针”对象

我试图跟踪我的

foreach

循环的索引，但它不能正常工作，正如您在上面发布的

echo

中所看到的，当我第一次执行PHP代码时，我得到了我的第一个对象的JSON字符串，我没有得到任何print\r（）。然后，当我第二次刷新页面时，我会得到第一个对象的

objID

字符串的打印，同样，如果我第三次刷新页面，我会得到第二个对象的

objID

，而json文件中存储了3个对象。等等，换句话说，我从来没有得到第一个对象的打印信息

---

我做错了什么？

您正在以字符串而不是变量的形式传递

$I

。使用双引号（

“

）或删除单引号（

”

）作为变量传递。这将解决指针对象无法正确打印的问题

$obj['pointer'][$i]['objID']

更新

[{"objID":"VUDjCZX8QX","pointer":{"type":"__pointer","objID":"dgFg45dG","className":"Users"},"string":"mark","createdOn":"2018-09-17 05:36:49","updatedOn":"2018-09-17 05:36:49","number":111,"boolean":true,"array":["john","sarah"]},{"objID":"1uWH17OoJP","pointer":{"type":"__pointer","objID":"dgFg45dG","className":"Users"},"string":"mark","createdOn":"2018-09-17 05:36:51","updatedOn":"2018-09-17 05:36:51","number":111,"boolean":true,"array":["john","sarah"]},{"objID":"RkubyQPvqR","pointer":{"type":"__pointer","objID":"dgFg45dG","className":"Users"},"string":"mark","createdOn":"2018-09-17 05:36:54","updatedOn":"2018-09-17 05:36:54","number":111,"boolean":true,"array":["john","sarah"]}]

根据上面的JSON字符串，您不需要指定

$i

---

$obj['pointer']['objID']

应该可以工作，因为它是关联数组。

多亏了@saumini-navaratnam，我必须使用以下

foreach

：

foreach($jsonObjs as $i=>$obj) {
   print_r('<br><br>'.$i.'-- ');
   echo 
       $obj['objID'].', '
       .$obj['pointer']['objID']. ', '
       .$obj['pointer']['type']. ', '
       .$obj['pointer']['className']. '<br><br>'
   ;               
} 

事实上，这是我得到的回音：

 [
{"objID":"pkO8NesS5S","pointer":{"type":"__pointer","objID":"dgFg45dG","className":"Users"},"string":"bobby","createdOn":"2018-09-17 07:03:27","updatedOn":"2018-09-17 07:03:27","number":111,"boolean":true,"array":["john","sarah"]},
{"objID":"rdwJl20krC","pointer":{"type":"__pointer","objID":"dgFg45dG","className":"Users"},"string":"bobby","createdOn":"2018-09-17 07:03:31","updatedOn":"2018-09-17 07:03:31","number":111,"boolean":true,"array":["john","sarah"]},
{"objID":"3WspzmuwMK","pointer":{"type":"__pointer","objID":"dgFg45dG","className":"Users"},"string":"bobby","createdOn":"2018-09-17 07:07:39","updatedOn":"2018-09-17 07:07:39","number":111,"boolean":true,"array":["john","sarah"]}
]

0-- pkO8NesS5S, dgFg45dG, __pointer, Users


1-- rdwJl20krC, dgFg45dG, __pointer, Users


2-- 3WspzmuwMK, dgFg45dG, __pointer, Users

---

不，抱歉，它打印相同的结果，我甚至用$obj['pointer'][$I]['objID']尝试过，没有积极的结果：（@xscoder我已经更新了答案。请不要使用

$I

尝试。非常感谢，你是对的，现在它工作了，我还编辑了我的答案，以便通过将代码移到echo$jsonData之后来修复索引打印

foreach($jsonObjs as $i=>$obj) {
   print_r('<br><br>'.$i.'-- ');
   echo 
       $obj['objID'].', '
       .$obj['pointer']['objID']. ', '
       .$obj['pointer']['type']. ', '
       .$obj['pointer']['className']. '<br><br>'
   ;               
} 

{"pointer":{"type":"__pointer","objID":"dgFg45dG","className":"Users"}

 [
{"objID":"pkO8NesS5S","pointer":{"type":"__pointer","objID":"dgFg45dG","className":"Users"},"string":"bobby","createdOn":"2018-09-17 07:03:27","updatedOn":"2018-09-17 07:03:27","number":111,"boolean":true,"array":["john","sarah"]},
{"objID":"rdwJl20krC","pointer":{"type":"__pointer","objID":"dgFg45dG","className":"Users"},"string":"bobby","createdOn":"2018-09-17 07:03:31","updatedOn":"2018-09-17 07:03:31","number":111,"boolean":true,"array":["john","sarah"]},
{"objID":"3WspzmuwMK","pointer":{"type":"__pointer","objID":"dgFg45dG","className":"Users"},"string":"bobby","createdOn":"2018-09-17 07:07:39","updatedOn":"2018-09-17 07:07:39","number":111,"boolean":true,"array":["john","sarah"]}
]

0-- pkO8NesS5S, dgFg45dG, __pointer, Users


1-- rdwJl20krC, dgFg45dG, __pointer, Users


2-- 3WspzmuwMK, dgFg45dG, __pointer, Users