Sort array items in PHP so that it is not case sensitive to letters

When I use sort($topics) I get something along the lines of:

  1. Apple
  2. Green
  3. Zebra
  4. grass

In this example, “grass” starts with a lower case g but ends up after “Zebra” which has a capital letter.

How do I make it so that it sorts it where it ignores whether the word starts with capitals or not?

  1. Apple
  2. Green
  3. grass
  4. Zebra

Here is Solutions:

We have many solutions to this problem, But we recommend you to use the first solution because it is tested & true solution that will 100% work for you.

Solution 1

Call usort() as usort($topics, 'strnatcasecmp').

strcasecmp would do the job, too, but strnatcasecmp will also sort properly when you have numbers in your string.

Solution 2

There is natcasesort .


Note: Use and implement solution 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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