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<?php /** * @param array $items * @param array $weights * * @return mixed */ function random_weighted(array $items, array $weights) { $weight = 0; $return = current($items); for ($i = 0, $n = count($items); $i < $n; $i++) { $random = mt_rand(0, $weights[$i] + $weight); if ($random >= $weight) { $return = $items[$i]; } $weight += $weights[$i]; } return $return; } $items = ['a', 'b', 'c', 'd']; $weights = [0, 10, 10, 10]; $i = 100; $results = ['a' => 0, 'b' => 0, 'c' => 0, 'd' => 0]; do { $x = random_weighted($items, $weights); $results[$x]++; } while (--$i); var_dump($results);
Output for 5.6.15, 5.6.17, 7.4.0
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(32) ["d"]=> int(32) }
Output for 7.3.12
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(44) ["d"]=> int(26) }
Output for 7.3.11
array(4) { ["a"]=> int(0) ["b"]=> int(29) ["c"]=> int(32) ["d"]=> int(39) }
Output for 7.3.10
array(4) { ["a"]=> int(0) ["b"]=> int(35) ["c"]=> int(32) ["d"]=> int(33) }
Output for 7.3.9
array(4) { ["a"]=> int(0) ["b"]=> int(31) ["c"]=> int(32) ["d"]=> int(37) }
Output for 5.5.9, 7.3.8
array(4) { ["a"]=> int(0) ["b"]=> int(27) ["c"]=> int(35) ["d"]=> int(38) }
Output for 7.3.7
array(4) { ["a"]=> int(0) ["b"]=> int(27) ["c"]=> int(37) ["d"]=> int(36) }
Output for 7.3.6
array(4) { ["a"]=> int(0) ["b"]=> int(35) ["c"]=> int(20) ["d"]=> int(45) }
Output for 7.3.5
array(4) { ["a"]=> int(0) ["b"]=> int(28) ["c"]=> int(37) ["d"]=> int(35) }
Output for 7.3.4
array(4) { ["a"]=> int(0) ["b"]=> int(40) ["c"]=> int(34) ["d"]=> int(26) }
Output for 5.5.15, 7.3.3
array(4) { ["a"]=> int(0) ["b"]=> int(33) ["c"]=> int(36) ["d"]=> int(31) }
Output for 7.3.2
array(4) { ["a"]=> int(0) ["b"]=> int(17) ["c"]=> int(46) ["d"]=> int(37) }
Output for 7.3.1
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(37) ["d"]=> int(31) }
Output for 7.1.21, 7.3.0
array(4) { ["a"]=> int(0) ["b"]=> int(25) ["c"]=> int(39) ["d"]=> int(36) }
Output for 7.2.25
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(41) ["d"]=> int(29) }
Output for 5.6.6, 7.0.0 - 7.0.1, 7.2.24
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(33) ["d"]=> int(31) }
Output for 7.2.23
array(4) { ["a"]=> int(0) ["b"]=> int(27) ["c"]=> int(42) ["d"]=> int(31) }
Output for 5.5.7, 7.2.22
array(4) { ["a"]=> int(0) ["b"]=> int(28) ["c"]=> int(34) ["d"]=> int(38) }
Output for 7.2.21
array(4) { ["a"]=> int(0) ["b"]=> int(33) ["c"]=> int(31) ["d"]=> int(36) }
Output for 5.6.21, 7.2.8, 7.2.20
array(4) { ["a"]=> int(0) ["b"]=> int(34) ["c"]=> int(31) ["d"]=> int(35) }
Output for 7.2.19
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(28) ["d"]=> int(40) }
Output for 5.6.16, 7.0.29, 7.2.18
array(4) { ["a"]=> int(0) ["b"]=> int(27) ["c"]=> int(40) ["d"]=> int(33) }
Output for 7.2.17
array(4) { ["a"]=> int(0) ["b"]=> int(28) ["c"]=> int(43) ["d"]=> int(29) }
Output for 5.5.11, 7.2.13
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(38) ["d"]=> int(32) }
Output for 7.2.12
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(29) ["d"]=> int(41) }
Output for 7.2.11
array(4) { ["a"]=> int(0) ["b"]=> int(35) ["c"]=> int(34) ["d"]=> int(31) }
Output for 7.2.10
array(4) { ["a"]=> int(0) ["b"]=> int(38) ["c"]=> int(29) ["d"]=> int(33) }
Output for 7.2.9
array(4) { ["a"]=> int(0) ["b"]=> int(27) ["c"]=> int(27) ["d"]=> int(46) }
Output for 5.6.3, 7.2.7
array(4) { ["a"]=> int(0) ["b"]=> int(38) ["c"]=> int(25) ["d"]=> int(37) }
Output for 7.1.12, 7.2.6
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(35) ["d"]=> int(29) }
Output for 7.2.5
array(4) { ["a"]=> int(0) ["b"]=> int(24) ["c"]=> int(36) ["d"]=> int(40) }
Output for 7.2.4
array(4) { ["a"]=> int(0) ["b"]=> int(20) ["c"]=> int(42) ["d"]=> int(38) }
Output for 7.0.5, 7.1.22, 7.2.3
array(4) { ["a"]=> int(0) ["b"]=> int(31) ["c"]=> int(33) ["d"]=> int(36) }
Output for 7.2.2
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(35) ["d"]=> int(35) }
Output for 5.5.12, 5.6.33, 7.2.1
array(4) { ["a"]=> int(0) ["b"]=> int(27) ["c"]=> int(36) ["d"]=> int(37) }
Output for 7.2.0
array(4) { ["a"]=> int(0) ["b"]=> int(33) ["c"]=> int(34) ["d"]=> int(33) }
Output for 5.6.12, 7.1.33
array(4) { ["a"]=> int(0) ["b"]=> int(38) ["c"]=> int(27) ["d"]=> int(35) }
Output for 5.6.20, 7.0.23, 7.1.32
array(4) { ["a"]=> int(0) ["b"]=> int(29) ["c"]=> int(37) ["d"]=> int(34) }
Output for 5.6.28, 7.1.31
array(4) { ["a"]=> int(0) ["b"]=> int(35) ["c"]=> int(33) ["d"]=> int(32) }
Output for 7.1.30
array(4) { ["a"]=> int(0) ["b"]=> int(39) ["c"]=> int(22) ["d"]=> int(39) }
Output for 7.1.29
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(32) ["d"]=> int(38) }
Output for 7.1.28
array(4) { ["a"]=> int(0) ["b"]=> int(25) ["c"]=> int(42) ["d"]=> int(33) }
Output for 7.1.27
array(4) { ["a"]=> int(0) ["b"]=> int(31) ["c"]=> int(44) ["d"]=> int(25) }
Output for 5.5.24, 7.1.26
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(28) ["d"]=> int(36) }
Output for 7.1.25
array(4) { ["a"]=> int(0) ["b"]=> int(26) ["c"]=> int(36) ["d"]=> int(38) }
Output for 7.1.24
array(4) { ["a"]=> int(0) ["b"]=> int(37) ["c"]=> int(25) ["d"]=> int(38) }
Output for 5.5.16, 7.1.23
array(4) { ["a"]=> int(0) ["b"]=> int(37) ["c"]=> int(35) ["d"]=> int(28) }
Output for 7.1.20
array(4) { ["a"]=> int(0) ["b"]=> int(25) ["c"]=> int(34) ["d"]=> int(41) }
Output for 5.6.14, 7.1.19
array(4) { ["a"]=> int(0) ["b"]=> int(31) ["c"]=> int(37) ["d"]=> int(32) }
Output for 7.1.18
array(4) { ["a"]=> int(0) ["b"]=> int(39) ["c"]=> int(26) ["d"]=> int(35) }
Output for 7.1.17
array(4) { ["a"]=> int(0) ["b"]=> int(21) ["c"]=> int(37) ["d"]=> int(42) }
Output for 7.1.16
array(4) { ["a"]=> int(0) ["b"]=> int(25) ["c"]=> int(41) ["d"]=> int(34) }
Output for 7.1.15
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(36) ["d"]=> int(34) }
Output for 5.5.19, 7.0.11, 7.1.14
array(4) { ["a"]=> int(0) ["b"]=> int(25) ["c"]=> int(35) ["d"]=> int(40) }
Output for 5.6.0, 7.1.13
array(4) { ["a"]=> int(0) ["b"]=> int(37) ["c"]=> int(29) ["d"]=> int(34) }
Output for 7.1.11
array(4) { ["a"]=> int(0) ["b"]=> int(29) ["c"]=> int(45) ["d"]=> int(26) }
Output for 7.1.10
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(34) ["d"]=> int(30) }
Output for 5.5.29, 7.1.9
array(4) { ["a"]=> int(0) ["b"]=> int(35) ["c"]=> int(30) ["d"]=> int(35) }
Output for 7.1.8
array(4) { ["a"]=> int(0) ["b"]=> int(41) ["c"]=> int(29) ["d"]=> int(30) }
Output for 7.1.7
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(36) ["d"]=> int(28) }
Output for 7.1.6
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(34) ["d"]=> int(36) }
Output for 7.1.5
array(4) { ["a"]=> int(0) ["b"]=> int(35) ["c"]=> int(40) ["d"]=> int(25) }
Output for 5.6.22, 7.1.4
array(4) { ["a"]=> int(0) ["b"]=> int(29) ["c"]=> int(33) ["d"]=> int(38) }
Output for 7.1.3
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(33) ["d"]=> int(35) }
Output for 7.0.22, 7.1.2
array(4) { ["a"]=> int(0) ["b"]=> int(28) ["c"]=> int(30) ["d"]=> int(42) }
Output for 7.1.1
array(4) { ["a"]=> int(0) ["b"]=> int(25) ["c"]=> int(36) ["d"]=> int(39) }
Output for 7.1.0
array(4) { ["a"]=> int(0) ["b"]=> int(27) ["c"]=> int(34) ["d"]=> int(39) }
Output for 7.0.33
array(4) { ["a"]=> int(0) ["b"]=> int(33) ["c"]=> int(30) ["d"]=> int(37) }
Output for 7.0.32
array(4) { ["a"]=> int(0) ["b"]=> int(38) ["c"]=> int(32) ["d"]=> int(30) }
Output for 7.0.31
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(44) ["d"]=> int(24) }
Output for 7.0.30
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(25) ["d"]=> int(45) }
Output for 7.0.28
array(4) { ["a"]=> int(0) ["b"]=> int(31) ["c"]=> int(30) ["d"]=> int(39) }
Output for 7.0.27
array(4) { ["a"]=> int(0) ["b"]=> int(28) ["c"]=> int(33) ["d"]=> int(39) }
Output for 7.0.26
array(4) { ["a"]=> int(0) ["b"]=> int(26) ["c"]=> int(33) ["d"]=> int(41) }
Output for 5.6.1, 7.0.21, 7.0.25
array(4) { ["a"]=> int(0) ["b"]=> int(27) ["c"]=> int(32) ["d"]=> int(41) }
Output for 5.5.38, 7.0.13, 7.0.24
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(31) ["d"]=> int(37) }
Output for 5.6.32, 5.6.34, 7.0.15, 7.0.20
array(4) { ["a"]=> int(0) ["b"]=> int(28) ["c"]=> int(36) ["d"]=> int(36) }
Output for 7.0.19
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(38) ["d"]=> int(26) }
Output for 5.6.37, 7.0.18
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(37) ["d"]=> int(33) }
Output for 7.0.17
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(27) ["d"]=> int(41) }
Output for 7.0.16
array(4) { ["a"]=> int(0) ["b"]=> int(26) ["c"]=> int(32) ["d"]=> int(42) }
Output for 7.0.14
array(4) { ["a"]=> int(0) ["b"]=> int(34) ["c"]=> int(36) ["d"]=> int(30) }
Output for 5.5.0, 5.5.33, 5.6.31, 7.0.12
array(4) { ["a"]=> int(0) ["b"]=> int(34) ["c"]=> int(34) ["d"]=> int(32) }
Output for 7.0.10
array(4) { ["a"]=> int(0) ["b"]=> int(41) ["c"]=> int(21) ["d"]=> int(38) }
Output for 7.0.9
array(4) { ["a"]=> int(0) ["b"]=> int(27) ["c"]=> int(25) ["d"]=> int(48) }
Output for 5.6.8, 7.0.8
array(4) { ["a"]=> int(0) ["b"]=> int(31) ["c"]=> int(27) ["d"]=> int(42) }
Output for 7.0.7
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(42) ["d"]=> int(28) }
Output for 7.0.6
array(4) { ["a"]=> int(0) ["b"]=> int(37) ["c"]=> int(33) ["d"]=> int(30) }
Output for 7.0.4
array(4) { ["a"]=> int(0) ["b"]=> int(35) ["c"]=> int(37) ["d"]=> int(28) }
Output for 7.0.3
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(24) ["d"]=> int(44) }
Output for 7.0.2
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(30) ["d"]=> int(34) }
Output for 5.6.38
array(4) { ["a"]=> int(0) ["b"]=> int(35) ["c"]=> int(27) ["d"]=> int(38) }
Output for 5.6.36
array(4) { ["a"]=> int(0) ["b"]=> int(29) ["c"]=> int(40) ["d"]=> int(31) }
Output for 5.6.35
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(29) ["d"]=> int(39) }
Output for 5.6.30
array(4) { ["a"]=> int(0) ["b"]=> int(27) ["c"]=> int(38) ["d"]=> int(35) }
Output for 5.5.21, 5.6.29
array(4) { ["a"]=> int(0) ["b"]=> int(29) ["c"]=> int(38) ["d"]=> int(33) }
Output for 5.6.27
array(4) { ["a"]=> int(0) ["b"]=> int(31) ["c"]=> int(35) ["d"]=> int(34) }
Output for 5.5.18, 5.6.26
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(36) ["d"]=> int(32) }
Output for 5.6.25
array(4) { ["a"]=> int(0) ["b"]=> int(38) ["c"]=> int(33) ["d"]=> int(29) }
Output for 5.6.24
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(42) ["d"]=> int(26) }
Output for 5.6.23
array(4) { ["a"]=> int(0) ["b"]=> int(35) ["c"]=> int(39) ["d"]=> int(26) }
Output for 5.6.19
array(4) { ["a"]=> int(0) ["b"]=> int(31) ["c"]=> int(22) ["d"]=> int(47) }
Output for 5.6.18
array(4) { ["a"]=> int(0) ["b"]=> int(30) ["c"]=> int(28) ["d"]=> int(42) }
Output for 5.6.13
array(4) { ["a"]=> int(0) ["b"]=> int(34) ["c"]=> int(28) ["d"]=> int(38) }
Output for 5.6.11
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(43) ["d"]=> int(21) }
Output for 5.5.1, 5.6.10
array(4) { ["a"]=> int(0) ["b"]=> int(29) ["c"]=> int(36) ["d"]=> int(35) }
Output for 5.6.9
array(4) { ["a"]=> int(0) ["b"]=> int(39) ["c"]=> int(29) ["d"]=> int(32) }
Output for 5.6.7
array(4) { ["a"]=> int(0) ["b"]=> int(37) ["c"]=> int(28) ["d"]=> int(35) }
Output for 5.6.5
array(4) { ["a"]=> int(0) ["b"]=> int(33) ["c"]=> int(32) ["d"]=> int(35) }
Output for 5.6.4
array(4) { ["a"]=> int(0) ["b"]=> int(34) ["c"]=> int(32) ["d"]=> int(34) }
Output for 5.6.2
array(4) { ["a"]=> int(0) ["b"]=> int(22) ["c"]=> int(41) ["d"]=> int(37) }
Output for 5.5.37
array(4) { ["a"]=> int(0) ["b"]=> int(19) ["c"]=> int(50) ["d"]=> int(31) }
Output for 5.5.36
array(4) { ["a"]=> int(0) ["b"]=> int(33) ["c"]=> int(40) ["d"]=> int(27) }
Output for 5.5.35
array(4) { ["a"]=> int(0) ["b"]=> int(28) ["c"]=> int(35) ["d"]=> int(37) }
Output for 5.5.34
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(37) ["d"]=> int(27) }
Output for 5.5.32
array(4) { ["a"]=> int(0) ["b"]=> int(33) ["c"]=> int(26) ["d"]=> int(41) }
Output for 5.5.31
array(4) { ["a"]=> int(0) ["b"]=> int(34) ["c"]=> int(39) ["d"]=> int(27) }
Output for 5.5.30
array(4) { ["a"]=> int(0) ["b"]=> int(25) ["c"]=> int(33) ["d"]=> int(42) }
Output for 5.5.28
array(4) { ["a"]=> int(0) ["b"]=> int(35) ["c"]=> int(31) ["d"]=> int(34) }
Output for 5.5.27
array(4) { ["a"]=> int(0) ["b"]=> int(31) ["c"]=> int(42) ["d"]=> int(27) }
Output for 5.5.26
array(4) { ["a"]=> int(0) ["b"]=> int(32) ["c"]=> int(38) ["d"]=> int(30) }
Output for 5.5.25
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(27) ["d"]=> int(37) }
Output for 5.5.23
array(4) { ["a"]=> int(0) ["b"]=> int(37) ["c"]=> int(31) ["d"]=> int(32) }
Output for 5.5.22
array(4) { ["a"]=> int(0) ["b"]=> int(29) ["c"]=> int(35) ["d"]=> int(36) }
Output for 5.5.20
array(4) { ["a"]=> int(0) ["b"]=> int(41) ["c"]=> int(33) ["d"]=> int(26) }
Output for 5.5.17
array(4) { ["a"]=> int(0) ["b"]=> int(23) ["c"]=> int(34) ["d"]=> int(43) }
Output for 5.5.14
array(4) { ["a"]=> int(0) ["b"]=> int(28) ["c"]=> int(32) ["d"]=> int(40) }
Output for 5.5.13
array(4) { ["a"]=> int(0) ["b"]=> int(36) ["c"]=> int(31) ["d"]=> int(33) }
Output for 5.5.10
array(4) { ["a"]=> int(0) ["b"]=> int(34) ["c"]=> int(33) ["d"]=> int(33) }
Output for 5.5.8
array(4) { ["a"]=> int(0) ["b"]=> int(39) ["c"]=> int(27) ["d"]=> int(34) }
Output for 5.5.6
array(4) { ["a"]=> int(0) ["b"]=> int(20) ["c"]=> int(36) ["d"]=> int(44) }
Output for 5.5.5
array(4) { ["a"]=> int(0) ["b"]=> int(31) ["c"]=> int(28) ["d"]=> int(41) }
Output for 5.5.4
array(4) { ["a"]=> int(0) ["b"]=> int(33) ["c"]=> int(27) ["d"]=> int(40) }
Output for 5.5.3
array(4) { ["a"]=> int(0) ["b"]=> int(33) ["c"]=> int(35) ["d"]=> int(32) }
Output for 5.5.2
array(4) { ["a"]=> int(0) ["b"]=> int(24) ["c"]=> int(37) ["d"]=> int(39) }
preferences:
74.21 ms | 609 KiB | 5 Q