<?php
$a = [
0 => 'Подключения',
1 => 'Эксплуатация',
2 => 'Эксплуатация',
3 => 'Подключения',
4 => 'Эксплуатация',
5 => 'Подключения',
6 => 'Подключения',
7 => 'Подключения',
];
$b = [
0 => 0,
1 => 3,
2 => 5,
3 => 6,
4 => 7,
5 => 8,
6 => 9,
7 => 10,
];
echo $c[7]; // Эксплуатация
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