July 2025
Beginner
768 pages
16h 54m
English
Content preview from PHP, MySQL, & JavaScript All-In-One For Dummies, 2nd Edition
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Chapter 2
PHP Flow Control
IN THIS CHAPTER
Adding conditional tests
Looping through code
Building functions
Understanding event-driven programming
In the previous chapter, you saw the basics of creating and running PHP programs. You saw how to use variables to hold data, but you didn't really do much with them to test the data and perform operations. In this chapter, I walk through how to use the PHP conditional tests to control how your program behaves, as well as show how to loop through code to perform multiple iterations. If you have code that you find yourself using frequently, I show how you can convert it into functions to share among your programs. Finally, I cover how to use PHP code in your event-driven web applications to add to your dynamic web applications.
Using Logic Control
Only having variables and echo statements in your PHP program would be pretty boring. You need to give your programs some intelligence so that they can make decisions based on what's happening in the application, and display different sets of content based on those decisions.
Every programming ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.