Tips for optimizing your php code
# If a method can be static, declare it static. Speed improvement is by a factor of 4.
# echo is faster than print.
# Use echo’s multiple parameters instead of string concatenation.
# Set the maxvalue for your for-loops before and not in the loop.
# Unset your variables to free memory, especially large arrays.
# Avoid magic like __get, __set, __autoload
# require_once() is expensive
# Use full paths in includes and requires, less time spent on resolving the OS paths.
# If you need to find out the time when the script started executing, $_SERVER[’REQUEST_TIME’] is preferred to time()
# See if you can use strncasecmp, strpbrk and stripos instead of regex
# str_replace is faster than preg_replace, but strtr is faster than str_replace by a factor of 4
# If the function, such as string replacement function, accepts both arrays and single characters as arguments, and if your argument list is not too long, consider writing a few redundant replacement statements, passing one character at a time, instead of one line of code that accepts arrays as search and replace arguments.
# It’s better to use select statements than multi if, else if, statements.
# Error suppression with @ is very slow.
# Turn on apache’s mod_deflate
# Close your database connections when you’re done with them
# $row[’id’] is 7 times faster than $row[id]
# Error messages are expensive
# Do not use functions inside of for loop, such as for ($x=0; $x < count($array); $x) The count() function gets called each time.
# Incrementing a local variable in a method is the fastest. Nearly the same as calling a local variable in a function.
Tags: arrays, Code, concatenation, echo, especially, expensive, loop, maxvalue, memory, Multiple, Optimizing, PHP, print, strncasecmp, strpbrk, Tips