Summary of 13 good coding habits that PHP programmers must know_PHP Tutorial

I am a PHP newbie with only 6 months experience in PHP programming and working under the guidance of a certified zend engineer, whenever I write a script I pay attention to something that allows me to do Get better details, that is, these 14 good PHP coding habits listed in this article. If you have better suggestions, please feel free to post them in the comments at the end of this article. I like to seek knowledge.

1. When using select to query information from the same database, use a join statement to get all the information you need neatly at once, instead of writing multiple mysql_query/while/mysql_fetch_array statements.

2. If you call a database connection in multiple files, create a connection.php file to save your connection variables, and include this file where needed.

3. For small projects, write all your functions in a file. If it is a large project, write them in objects, and then include this file where needed.

4. If your include files are out of control, you can create an include file that contains all the .inc files, and then include this include file where you need it.

5. Write documentation for your code. You will need it when you look at the code 3 months later.

6. Code layout, nothing is more important than readability.

7. Separate the logic and presentation layers.

8. When writing classes, make sure you know when is the best time to couple and when is the best time to extend.

9. The interface is your friend.

　10. When projects get bigger, breaking your code into models, views, and controllers is super cheating.

11. Never output POST and GET data without stripping off the HTML tags,

12. Never trust input from the user, even if she is your mother.

13. Never repeat class names, remember, always!