To reuse validations, set up custom validation functions that are available to you from project to project. Make adjustments such as taking away echo statements. This video suggests rewriting MySQL code so that it is affirmative-based instead of negative-based. For example, it's often best to ask if a field has presence rather than if it has no presence.
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Over the last few movies, we've seen how to validate the form data that comes in …to us and how to display useful error messages back to our user. …But our validations right now are not really reusable, we've just written if statements. …If a certain logic is true or if a certain logic is false, then add an error. …It would be much better if we could take that validation and put it into a custom …function so that we could reuse it. And that way, every time throughout our …entire application that we want to check and see is a form field blank, we can …just call our function and ask it. Hey, use your logic that you have built …in and tell me, is this form field blank? What's going to be really useful, is if …we can develop a file that is going to be a library of validation functions that we …can just include and call upon whenever needed.…
That way, we can do it throughout our application, and potentially we can even …take that file from project to project, and always have these validations ready …
- 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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