PHP: Fastest way to check if an array is empty

I just posted benchmarks for checking for an empty string that I ran when looking to improve the efficiency of an application. Another simple benchmark I ran was for ways to check if an array is empty.

Like strings, there are a ton of ways to check if am array is empty. These here are not exhaustive, but a few that I chose to test:

  1. !$array
  2. $array == false
  3. empty($array)
  4. count($array) == 0
  5. $array == array()

PHP: Fastest way to check if a string is blank

I run an application that requires a very high level of efficiency due to very high volume. I recently did an evaluation of efficiency for this application and performed a benchmark on a number of important aspects of the code. My findings were very interesting.

As you may know, there are a ton of ways to check if a string is empty. These here are not exhaustive, but a few that I chose to test:

  1. !$string
  2. $string == false
  3. empty($string)
  4. strlen($string) == 0
  5. $string == ” Continue reading