hash_keys — return all the keys of a hash as a stringlist
This function works on a hash created by hash_create and returns a stringlist containing all the keys of the hash. If the given hash is not empty, the elements in the returned stringlist are in random order. For an empty hash, the returned stringlist contains nothing.
$hash = hash_create; hash_set $hash "mykey1" "myval1"; hash_set $hash "mykey2" "myval2"; hash_set $hash "mykey3" "myval3"; $keys = hash_keys $hash; #keys is now a stringlist containing "mykey1", "mykey2" and "mykey3"