August 2016
Intermediate to advanced
610 pages
11h 55m
English
Content preview from PHP 7 Programming CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Using traits
If you have ever done any C programming, you are perhaps familiar with macros. A macro is a predefined block of code that expands at the line indicated. In a similar manner, traits can contain blocks of code that are copied and pasted into a class at the line indicated by the PHP interpreter.
How to do it...
- Traits are identified with the keyword
trait, and can contain properties and/or methods. You may have noticed duplication of code when examining the previous recipe featuring theCountryListandCustomerListclasses. In this example, we will re-factor the two classes, and move the functionality of thelist()method into aTrait. Notice that thelist()method is the same in both classes. - Traits are used in situations where there is ...
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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.
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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.