Question

$vals = array(51, 23, 77, 3, 8, 31, 17, 102, 87);
arsort($vals);  

From here, how can I get the keys of the 3 first values? If I do $vals[0] it won’t work because it’ll return me the original [0] key before the arsort.

I want to get the original keys of 102, 87 and 77 after arsort.

Answer 1

Depending on what you need it for, one way is

$keys = array_keys($vals);

$keys[0] will contain the first key.
$vals[$keys[0]] will contain the first value.

An alternate way

$part = array_slice($vals, 0, 3, true);

$part will contain three $key => $value pairs for the first three entries.

And for the first three keys, you can mix and match the above, such as:

$firstThree = array_keys(array_slice($vals, 0, 3, true));