<?php $array = [ ['FA',12.9], ['FA',12.9], ['FB',12.2], ['FC',12.3], ['FA',12.9], ['FB',12.9], ['FA',12.4], ]; $grouped = []; foreach ($array as $row) { $compositeKey = implode($row); if (!isset($grouped[$compositeKey])) { $grouped[$compositeKey] = array_merge($row, [1]); } else { ++$grouped[$compositeKey][2]; } } foreach ($grouped as $row) { vprintf("%s %0.1fx%d\n", $row); }
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