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php中 ->与 ==>符号的用法与区别

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Release: 2016-05-25 16:44:18
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“->”(减号、右尖括号):用于类中,访问类里的函数或对象,比如如下代码:

class Test { 
function do_test() { echo "Doing foo."; } } 
$bar = new Test; $bar->do_test(); 
?> 

"=>"(等号、右尖括号):数组中给值赋值,比如如下代码:

$arr=array("one" =>("1"=>10, "2"=>20), "two"=>2);  

那么$arr["one"]["1"]=10;

‘->’与C++类似,用以指向对象内部结构或方法;

‘=>’是PHP数组带索引元素定义的一种方式。

=> 键值对,左边是键,右边是值(类似 json 的 key:val )

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