Normal PHP array for exclude section of WordPress query?

You’re just seeing the indices (indexes).

<?php

$array = array( 1,2,3,4 );
print_r( $array);

/*
outputs: 
Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
)
*/

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)