How to search for highest key index in an array

Question

How can I get with PHP the highest key/index in an array? I know how to do it for the values.

E.g. From this array I would like to get "10" as an integer value:

$arr = array( 1 => "A", 10 => "B", 5 => "C" );

I know how I could program it, but I was asking myself if there as a function for this as well.

Answer 1

Hello @kartik,

This should work fine

$arr = array( 1 => "A", 10 => "B", 5 => "C" );
max(array_keys($arr));

Hope it helps!!
Thank you!!