The difference between php arrays and objects

The difference between php arrays and objects is: arrays use [=>], the code is [$arr=['a'=>123] echo $arr['a']], and objects use 【->】, the code is 【$obj=new A();echo $obj->a;】.

The difference between php arrays and objects is:

Array usage=>

Object usage->

<?php 
  $arr=[&#39;a&#39;=>123,&#39;b&#39;=>456]; //数组初始化 
  echo $arr[&#39;a&#39;]; //数组引用 
  print_r($arr); //查看数组 
  echo "<br><br>"; //换行
  class A{ 
    public $a=123; 
    public $b=456; 
  } 
  $obj=new A();
  echo $obj->a; //对象引用
  print_r($obj); //查看对象
?>

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