search
Homephp教程php手册php中global和$GLOBALS[]用法区别

php中global和$GLOBALS[]用法区别

Jun 13, 2016 am 10:15 AM
globalphpthe differenceandcommonyesCompareusage

php中global和$GLOBALS[]是比较常见全局变量了,下面我们给大家看一个简单的实例,来区别一下global和$GLOBALS[]用法吧。

根据官方的解释是 :

1.$GLOBALS['var']是外部的全局变量本身。

 代码如下 复制代码

$var1 = 1; 
function test(){ 
     unset($GLOBALS['var1']); 

test(); 
echo $var1; 
?> 


2.global $var是外部$var的同名引用或者指针。

 

 代码如下 复制代码
$globalStr = '.com';
 
function globalTest(){
 
 global $globalStr;
 
 $globalStr = 'coderbolg'.$globalStr;
 
 unset($globalStr);
 
}
 
globalTest();
 
echo $globalStr; //输入: coderbolg.com
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.