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<?php function countUnique($a) { $acv=array_count_values($a); $n=0; foreach ($acv as $f) if ($f==1) $n++; return $n; } function countUniqueTML($a) { return array_reduce( array_count_values($a), function($c, $i) { return ($i === 1) ? $c + 1 : $c; }, 0); } function countUniqueGG($a) { $cardinal=[]; foreach($a as $v) if (isset($cardinal[$v])) $cardinal[$v] = 0; else $cardinal[$v] = 1; return array_sum($cardinal); } $a=[1,1,2,2,2,5,6]; echo countUniqueTML($a); echo "\n"; echo countUnique($a); echo "\n"; echo countUnique($a);
Output for 7.0.0 - 7.0.23, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
2 2 2

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73.74 ms | 407 KiB | 5 Q