如何用PHP编辑JSON？

我想删除整个文本，使其像 “文本”：“

---

但是我的代码不起作用，它保存的是相同的原始json文件。

您必须使用带符号的pass-by-reference

{
    "books": [
        {
            "book": "1 Nephi",
            "chapters": [
                {
                    "chapter": 1,
                    "reference": "1 Nephi 1",
                    "verses": [
                        {
                            "reference": "1 Nephi 1:1",
                            "text": "I, Nephi, having been born of goodly parents, therefore I was taught somewhat in all the learning of my father; and having seen many afflictions in the course of my days, nevertheless, having been highly favored of the Lord in all my days; yea, having had a great knowledge of the goodness and the mysteries of God, therefore I make a record of my proceedings in my days.",
                            "verse": 1
                        },
                        {
                            "reference": "1 Nephi 1:2",
                            "text": "Yea, I make a record in the language of my father, which consists of the learning of the Jews and the language of the Egyptians.",
                            "verse": 2
                        },
                        {
                            "reference": "1 Nephi 1:3",
                            "text": "And I know that the record which I make is true; and I make it with mine own hand; and I make it according to my knowledge.",
                            "verse": 3
                        },

您的代码应该是：-

foreach($chapters['verses'] as &$verses){
   $verses['text'] = "";      
}

---

您必须使用带符号的按参考传递

{
    "books": [
        {
            "book": "1 Nephi",
            "chapters": [
                {
                    "chapter": 1,
                    "reference": "1 Nephi 1",
                    "verses": [
                        {
                            "reference": "1 Nephi 1:1",
                            "text": "I, Nephi, having been born of goodly parents, therefore I was taught somewhat in all the learning of my father; and having seen many afflictions in the course of my days, nevertheless, having been highly favored of the Lord in all my days; yea, having had a great knowledge of the goodness and the mysteries of God, therefore I make a record of my proceedings in my days.",
                            "verse": 1
                        },
                        {
                            "reference": "1 Nephi 1:2",
                            "text": "Yea, I make a record in the language of my father, which consists of the learning of the Jews and the language of the Egyptians.",
                            "verse": 2
                        },
                        {
                            "reference": "1 Nephi 1:3",
                            "text": "And I know that the record which I make is true; and I make it with mine own hand; and I make it according to my knowledge.",
                            "verse": 3
                        },

您的代码应该是：-

foreach($chapters['verses'] as &$verses){
   $verses['text'] = "";      
}

您必须使用

案例1:如果json结构在每种情况下始终相同，则

foreach($obj['books'] as &$books){
   foreach ($books['chapters'] as &$chapters){
     foreach($chapters['verses'] as &$verses){
          $verses['text'] = "";      
        }
   }
 }

输出：-

案例2:如果json结构可以更改，那么

foreach($obj['books'][0]['chapters'][0]['verses'] as &$verses){//& => passing by reference concept
  $verses['text'] = '';
}

输出：-

您必须使用

案例1:如果json结构在每种情况下始终相同，则

foreach($obj['books'] as &$books){
   foreach ($books['chapters'] as &$chapters){
     foreach($chapters['verses'] as &$verses){
          $verses['text'] = "";      
        }
   }
 }

输出：-

案例2:如果json结构可以更改，那么

foreach($obj['books'][0]['chapters'][0]['verses'] as &$verses){//& => passing by reference concept
  $verses['text'] = '';
}

---

输出：-

您不认为，您将$obj作为其值进行json_编码的问题没有改变吗？您不认为，您将$obj作为其值进行json_编码的问题没有改变吗？您需要在每个

foreach

赋值中传递引用，否则，您将永远不会对顶级对象进行更改。看到另一个了吗answer@Phil谢谢你指出这一点，我忘了说，解决方案已经更新了。@Phil很棒的观察。@AlivetoDie..：）你需要在每个

foreach

赋值中传递引用，否则你将永远无法更改顶级对象。看到另一个了吗answer@Phil谢谢你指出这一点，我忘了说，解决方案已经更新了。@Phil很好的观察。@AlivetoDie.）