Trait is a new feature in PHP5.4 and is a solution to PHP multiple inheritance. For example, you need to inherit two Abstract Classes at the same time,
This will be a very troublesome thing, and Trait was born to solve this problem. How to use
First of all, of course, declare a Trait. PHP5.4 added the trait keyword

If you want to use the Trait in Class, then use the use keyword
If you want to Use multiple traits separated by commas

When referencing multiple traits object method names conflict

The above introduces the PHP trait features, including PHP and tra content. I hope it will be helpful to friends who are interested in PHP tutorials.
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