PHP - Get key name of array value

Question

I have an array as the following:

function example() {
    /* some stuff here that pushes items with
        dynamically created key strings into an array */         


        

Answer 1

use array_keys() to get an array of all the unique keys.

Note that an array with named keys like your $arr can also be accessed with numeric indexes, like $arr[0].

http://php.net/manual/en/function.array-keys.php