Online PHP editor | perf for HGnAk

<?php function array_rand_secure($array, $num = 1) { if (!is_array($array)) { trigger_error( __FUNCTION__ . "(): expects parameter 1 to be array, " . gettype($array) . " given", E_USER_WARNING ); return null; } $arrayLength = count($array); if ($arrayLength === 0) { trigger_error(__FUNCTION__ . "(): Array is empty", E_USER_WARNING); return null; } if ( filter_var($num, FILTER_VALIDATE_INT) === false || $num <= 0 || ($arrayLength - $num) < 0 ) { trigger_error( __FUNCTION__ . "(): Second argument has to be between 1 and the number of elements in the array", E_USER_WARNING); return null; } $randomIndexes = []; while(count($randomIndexes) < $num) { $randomInt = random_int(0, $arrayLength - 1); if (!in_array($randomInt, $randomIndexes)) $randomIndexes[] = $randomInt; }; $arrayKeys = array_keys($array); $randomKeys = array_map(function ($key) use ($arrayKeys) { return $arrayKeys[$key]; }, $randomIndexes); return count($randomKeys) === 1 ? $randomKeys[0] : $randomKeys; } $tests1 = [ [1, 2, 3, 4, 5, 6, 7, 8, 9], [5, 6, 7], ['a' => 1, 'b' => 2, 'c' => 3], ['zero', 4 => 'four', 9 => 'nine'], ["PEAN"=>0], [], "ABC", 123, ]; foreach ($tests1 as $test) { var_dump(array_rand_secure($test)); } $tests2 = [ ["array" => [1, 2, 3, 4, 5, 6, 7, 8, 9], "num" => 9], ["array" => [1, 2, 3, 4, 5, 6, 7, 8, 9], "num" => 4], ["array" => ['a' => 1, 'b' => 2, 'c' => 3], "num" => 2], ["array" => ['zero', 4 => 'four', 9 => 'nine'], "num" => 2], ["array" => ["PEAN" => 0], "num" => 2], ["array" => [], "num" => 2], ["array" => "ABC", "num" => 2], ["array" => 123, "num" => 2], ["array" => [5, 6, 7], "num" => 0], ]; foreach ($tests2 as $test_data) { var_dump(array_rand_secure($test_data["array"], $test_data["num"])); }

Version	System time (s)	User time (s)	Memory (MiB)
8.3.2	0.017	0.008	25.66
8.3.1	0.003	0.016	25.66
8.3.0	0.014	0.005	25.66
8.2.15	0.019	0.007	25.66
8.2.14	0.015	0.003	25.66
8.2.13	0.014	0.005	25.66
8.2.12	0.011	0.009	25.66
8.2.11	0.014	0.006	25.66
8.2.10	0.011	0.011	25.66
8.2.9	0.018	0.007	25.66
8.2.8	0.009	0.012	25.66
8.2.7	0.018	0.007	25.66
8.2.6	0.010	0.009	25.66
8.2.5	0.016	0.009	25.66
8.2.4	0.017	0.005	25.66
8.2.3	0.012	0.007	25.66
8.2.2	0.012	0.008	25.66
8.2.1	0.017	0.007	25.66
8.2.0	0.009	0.008	25.66
8.1.27	0.014	0.003	25.66
8.1.26	0.012	0.007	25.66
8.1.25	0.005	0.014	25.66
8.1.24	0.014	0.008	25.66
8.1.23	0.013	0.010	25.66
8.1.22	0.013	0.011	25.66
8.1.21	0.019	0.005	25.66
8.1.20	0.009	0.010	25.66
8.1.19	0.013	0.005	25.66
8.1.18	0.015	0.007	25.66
8.1.17	0.013	0.007	25.66
8.1.16	0.019	0.003	25.66
8.1.15	0.010	0.008	25.66
8.1.14	0.018	0.006	25.66
8.1.13	0.011	0.009	25.66
8.1.12	0.016	0.004	25.66
8.1.11	0.013	0.005	25.66
8.1.10	0.012	0.007	25.66
8.1.9	0.008	0.011	25.66
8.1.8	0.008	0.009	25.66
8.1.7	0.011	0.008	25.66
8.1.6	0.016	0.002	25.66
8.1.5	0.015	0.005	25.66
8.1.4	0.012	0.003	25.66
8.1.3	0.015	0.011	25.66
8.1.2	0.017	0.008	25.66
8.1.1	0.020	0.005	25.66
8.1.0	0.012	0.003	25.66