Highly efficient PHP code writing
Summary
To write highly efficient PHP code, prioritize using single quotes for strings and accessing array elements with quoted keys like $row["id"]. Optimize loops by pre-calculating maximum iterations or using foreach, and always unset large unused variables to free memory. Define class methods as static when appropriate, and avoid magic methods like __get, __set, or __autoload. For file inclusion, prefer include with absolute paths over require_once, and utilize built-in functions such as strtr for string manipulation, which is significantly faster than str_replace or preg_replace. Employing switch statements over if/else and closing database connections also contributes to better performance.
0. Use single quote to replace double quote, this will be better since PHP will serach for variables in double quoted strings. Note, only echo can do this;
1. If we can define methods of a class as static, then do it. It will increase access speed by 4 times;
2. $row["id"] is 7 times faster than $row[id];
3. echo is faster than print, and also use echo's multiple parameter format such as echo $str1,$str2 instead of echo $str1.$str2;
4. When using for loop, make sure the maximum number of executions instead of calculating maximum execution times in each loop. Use foreach if you can;
5. unset unused variables especially for those large data structures like array to release memory;
6. try best to avoid using __get,__set and __autoload;
7. require_once() cost much;
8. use absolute path when using include() function, it will short the time for searching the included file;
9. If you want to know the execution time of a script, using $_SERVER["REQUEST_TIME"] is better than using time();
10. using functions to replace regular expression to realize the same functions;
11. str_replace() is faster than preg_replace() and strtr is 4 times faster than str_replace();
12. using switch is better than using if else;
13. using @ to hide error message is less efficient;
14. after finish using database connection, close it;
15. using built-in functions whenever you can
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COMMENTS
3Stop posting about micro optimisations like this. They are useless, and FUD
@Schizoduckie actually, these sorts of posts are great for novice developers and I have forwarded this article to a handful of up-and-coming php coders I know.
Thanks for the post.
Код Ð´Ð»Ñ Ð²ÑтавкиTrackback Hi there! Do you use Twitter? I'd like to follow you if that would be okay. I'm deilnitefy enjoying your blog and look forward to new posts .
