<?php $array = [ '.aero', '.airport.aero', '.cargo.aero', '.charter.aero', '.aetna' ]; $result = []; foreach ($array as $value) { if (!preg_match('/(?!^)\..+/', $value, $m)) { $result[$value] = ['tld' => $value, 'gTLD' => []]; } else { $result[$m[0]]['gTLD'][] = $value; } } var_export(array_values($result));
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