In PHP, the concept of variable scope means that variables are only accessible within their context. There are two main scopes -- global and local. This video in the PHP with MySQL training demonstrates scope and global variables using a simple PHP program. Also, learn how to check if a variable is available using the isset() function and how to work around scoping issues using the keyword global.
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We've seen how the variable names inside the function and outside the function are …unrelated, and we wrote a function to do addition. …The variable's sum was only available inside the function. …We couldn't use echo outside the function to retrieve that value, we had to use a …return value instead. Having this division between the …variables inside a function and outside a function, is known as variable scope. …A variable isn't accessible all the time. It's only accessible within it's context. …A variable created inside a function, is by default only accessible In the …function we say that the function is the variable's scope.…
In PHP there are two main scopes. There is the Global Scope and there is …the Local Scope. Let's take a look at them so we can see …the difference. Let's start by taking basic dot HTML, …calling Save As on it. We're going to call this functions_scope. …And I'm going to end it with php, Save it. …Now, let's create ourselves a little example, here. …Let's call this Functions: Scope. I'll start my php tags. …
- What is PHP?
- Installing and configuring PHP and MySQL
- Exploring data types
- Controlling code with logical expressions and loops
- Using PHP's built-in functions
- Writing custom functions
- Building dynamic webpages
- Working with forms and form data
- Using cookies and sessions to store data
- Connecting to MySQL with PHP
- Creating and editing database records
- Building a content management system
- Adding user authentication
Skill Level Beginner
PHP with MySQL Beyond the Basicswith Kevin Skoglund10h 26m Intermediate
1. PHP Overview
2. Mac Installation
3. Windows Installation
4. First Steps
5. Exploring Data Types
6. Control Structures: Logical Expressions
7. Control Structures: Loops
8. User-Defined Functions
10. Building Web Pages with PHP
11. Working with Forms and Form Data
12. Working with Cookies and Sessions
13. MySQL Basics
14. Using PHP to Access MySQL
15. Building a Content Management System (CMS)
16. Using Site Navigation to Choose Content
17. Application CRUD
18. Building the Public Area
19. Regulating Page Access
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