php - var_dump (object) 的结果是什么意思？

Question

var_dump(object) 返回:object()#1
我真的很想知道 object()#1、object()#2 和 object()#3 之间有什么区别。
任何帮助表示赞赏。

Answer 1

var_dump转储有关变量的信息。此函数显示有关一个或多个表达式的结构化信息，包括其类型和值。数组和对象通过缩进以显示结构的值进行递归探索。object()#1 ,object()#2,and object()#3 are the different object values inside a nested object which have been evaluated and given an id by var_dump在这里阅读更多 https://www.php.net/manual/en/function.var-dump.php
编辑 2
好像Object()#number是它在嵌套对象中找到某个键​​/值对的顺序。如果一个对象不包含任何键/值对而只包含另一个对象(带有键/值对)，则首先评估该内部对象并相应地给出#number。最后评估外部对象。
另外，Object()#number如果评估不同的对象，则结转。 Object()#number从它在第一个对象中结束的地方开始
这是一个例子。此代码将解码 JSON 并转储对象的输出

<?php
$a= '{
    "glossary": {
        "title": "example glossary",
        "GlossDiv": {
            "title": "S",
            "GlossList": {
                "GlossEntry": {
                    "ID": "SGML",
                    "SortAs": "SGML",
                    "GlossTerm": "Standard Generalized Markup Language",
                    "Acronym": "SGML",
                    "Abbrev": "ISO 8879:1986",
                    "GlossDef": {
                        "para": "A meta-markup language, used to create markup languages such as DocBook.",
                        "GlossSeeAlso": ["GML", "XML"]
                    },
                    "GlossSee": "markup"
                }
            }
        }
    }
}';

$b ='{
    "entry1": {
        "entry2": {
            "title": 2,
            "entry3": {
                "title": 4,
                "title" : 5
            }
        }
    }
}';


$json1 = json_decode($a);
$json2 = json_decode($b);


var_dump($json1);
var_dump($json2);

输出

object(stdClass)#6 (1) {
  ["glossary"]=>
  object(stdClass)#1 (2) {
    ["title"]=>
    string(16) "example glossary"
    ["GlossDiv"]=>
    object(stdClass)#2 (2) {
      ["title"]=>
      string(1) "S"
      ["GlossList"]=>
      object(stdClass)#5 (1) {
        ["GlossEntry"]=>
        object(stdClass)#3 (7) {
          ["ID"]=>
          string(4) "SGML"
          ["SortAs"]=>
          string(4) "SGML"
          ["GlossTerm"]=>
          string(36) "Standard Generalized Markup Language"
          ["Acronym"]=>
          string(4) "SGML"
          ["Abbrev"]=>
          string(13) "ISO 8879:1986"
          ["GlossDef"]=>
          object(stdClass)#4 (2) {
            ["para"]=>
            string(72) "A meta-markup language, used to create markup languages such as DocBook."
            ["GlossSeeAlso"]=>
            array(2) {
              [0]=>
              string(3) "GML"
              [1]=>
              string(3) "XML"
            }
          }
          ["GlossSee"]=>
          string(6) "markup"
        }
      }
    }
  }
}
object(stdClass)#10 (1) {
  ["entry1"]=>
  object(stdClass)#9 (1) {
    ["entry2"]=>
    object(stdClass)#7 (2) {
      ["title"]=>
      int(2)
      ["entry3"]=>
      object(stdClass)#8 (1) {
        ["title"]=>
        int(5)
      }
    }
  }
}

如果我错了，请纠正我