Summary of some tips for PHP code optimization_PHP tutorial

1. If a method can be made static, declare it statically. The speed of PHP code optimization can be increased up to 4 times.

2.echo is faster than print.

3. Use multiple parameters of echo (Translation: refers to using commas instead of periods) instead of string concatenation.

4. Determine the maximum number of loops before executing the for loop. Do not calculate the maximum value every time it loops.

5. Unregister those unused variables, especially large arrays, in order to release memory and achieve PHP code optimization.

6. Try to avoid using __get, __set, __autoload.

7.require_once() is expensive.

8. Use the full path when including files and it will take less time to resolve the operating system path.

9. If you want to know the time when the script starts executing (annotation: the server receives the client request), using $_SERVER[‘REQUEST_TIME’] is better than time().

10. Functions replace regular expressions to complete the same function.

11. The str_replace function is faster than the preg_replace function, but the strtr function is four times more efficient than the str_replace function to optimize PHP code.

12. If a string replacement function accepts arrays or characters as parameters, and the parameter length is not too long, then you can consider writing an additional replacement code so that each parameter passed is one character instead of Just write one line of code to accept arrays as parameters for query and replace.

13. It is better to use a selective branch statement (translation: switch case) than to use multiple if, else if statements.

14. Using @ to block error messages is very inefficient.

15. Open apache’s mod_deflate module.

16. The database connection should be closed when finished using it.

17.$row[‘id’] is 7 times more efficient than $row[id].

18. Error messages are expensive.

19. Try not to use functions in for loops. For example, for ($x=0; $x < count($array); $x) will call the count() function every time it loops.

20. Another way to optimize PHP code is to increment local variables in methods, which is the fastest. Almost as fast as calling local variables in a function.

http://www.bkjia.com/PHPjc/446327.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/446327.htmlTechArticle1. If a method can be statically declared, make a static declaration for it. The speed of PHP code optimization can be increased up to 4 times. 2.echo is faster than print. 3. Use multiple parameters of echo (Translation: refers to using commas...