How to determine whether get storage exists in php

php method to determine whether get exists: first create a PHP sample file; then determine get through the "if(is_array($_GET)&&count($_GET)>0){...}" statement Just check whether the parameter passed by value exists.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

How does php determine whether the get store exists?

php Determine whether the parameter passed by get value exists

if(is_array($_GET)&&count($_GET)>0)//先判断是否通过get传值了
    {
        if(isset($_GET["id"]))//是否存在"id"的参数
        {
            $id=$_GET["id"];//存在
        }
    }

In PHP, the predefined $_GET variable is used to collect values ​​from the form with method="get" .

$_GET Variable

The predefined $_GET variable is used to collect values ​​from the form with method="get".

The information sent from a form with the GET method is visible to anyone (will be displayed in the browser's address bar), and there is a limit on the amount of information sent.

Recommended learning: "PHP Video Tutorial"

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