Online PHP editor | output for gSGC0

<?php function get_combinations($arrays) { $result = array(array()); foreach ($arrays as $property => $property_values) { $tmp = array(); foreach ($result as $result_item) { foreach ($property_values as $property_value) { $tmp[] = array_merge($result_item, array($property => $property_value)); } } $result = $tmp; } return $result; } $in = [ 1 => 'мама', 3 => 'раму', 7 => 'раму', 8 => 'мыла', 13 => 'мама', ]; $flipped = []; foreach ($in as $key => $value) { $flipped[$value][] = $key; } $flipped = array_values($flipped); $result = get_combinations($flipped); var_export($result);