In nearly all cases, headers and redirection must come before any output that gets sent to the HTML. The only exception is when you have output buffering turn on. With output buffering, your PHP with MySQL outputs are not immediately sent to the HTML. Instead, instructions stay within the PHP code until the output is finished. Watch this online video to learn how you can use output buffering to improve your PHP code and user interaction.
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In the last two movies we talked about headers and redirection. …And one of the very important points about working with headers and …redirection is that they have to come before any output to the HTML. …And I stressed that several times. Unless there's one big caveat, which is …that we can have output buffering turned on. …And that's what we're going to talk about in this movie is what output buffering is. …And how it works. Let me give you a metaphor to illustrate. …Let's imagine, for a moment that our PHP code is a faucet and our web server is a glass.…
And we're going to fill up that glass with the output of the HTML. …So as we execute our PHP, code the output line by line is being sent to the web server. …The web server as soon as it gets the first little drop of water has the …headers established for what it's going to send. …That's why we can't change them after we start sending that code or the water to it. …And then once the page has completely finished rendering, then the web server …
- 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
Next steps2m 4s
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