Highest value of an array key?

PHP
1

Doesn’t actually matter now as I’ve fetched it while building the array, but… Isnt there a function for finding the maximum value of a key in a numeric array? In a numeric array are the keys ordered numerically and not the order in which they were set? I tried imploding array_keys() and sending that to max(), but PHP doesn’t like that idea. I know you can cycle through and test each against the current max, but there must be something more elegant…?

2

you could always you sort the array by the key then grab the last key…

3

If you are just manually assigning entries to an array with something like.


while (.....) {
  $data[] = $row;
  }

Then


$maxkey = count($data) - 1;

$maxkey would hold your max key value.

4

Hi!

This worked for me:

<?php
$test = array("1" => "test", "5" => "bla", "3" => "blubb");

echo max(array_keys($test));
?>

It should also work for keys that are non-numeric.

5

yet another alternative :): use ksort() to sort the array by key then get the first element


$sorted_array=ksort($my_array);
$max_key=$sorted_array[0];
6

Cheers for the input guys, I’m assuming that as 2 of suggested sorting the array that even in numeric arrays they remain in set order. I’m manually assigning keys in the while loop so count() is no good for me.

Chris, I didn’t know you could send an array to max(), so I tried

$keys = implode (', ', array_keys($array));
$max = max($keys);

But you can’t use a string.