3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $old_arr=array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20); $size = count($old_arr); print_r($size); for($i=0;$i<=19;$i++){ if ($i<=4){ $a[] = $old_arr[$i]; }elseif ($i>4 && $i<=9){ $b[] = $old_arr[$i]; }elseif ($i>9 && $i<=14){ $c[] = $old_arr[$i]; }elseif ($i>14){ $d[] = $old_arr[$i]; } } print_r($a); print_r($b); print_r($c); print_r($d); $group_order[] = mt_rand(1,4); while(count($group_order)<4){ $x=mt_rand(1,4); if(in_array($x,$group_order) == false){ $group_order[] = $x; } } print_r($group_order); ?>
Output for 4.4.9, 5.0.3, 5.2.3, 5.2.8, 5.3.16, 5.3.21, 5.4.1, 5.4.4, 5.4.37, 5.5.10, 7.1.0
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 2 [1] => 4 [2] => 1 [3] => 3 )
Output for 4.3.3, 4.4.2, 4.4.7, 5.1.3, 5.3.11, 5.3.20, 5.4.2, 5.4.20, 5.4.38, 7.0.4, 7.0.14
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 1 [1] => 4 [2] => 2 [3] => 3 )
Output for 5.0.4, 5.2.7, 5.4.0, 5.4.21, 5.4.29, 5.6.3, 5.6.6, 5.6.9, 5.6.16, 5.6.21, 7.0.1, 7.0.12
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 3 [1] => 4 [2] => 1 [3] => 2 )
Output for 4.3.4, 4.3.6, 5.2.1 - 5.2.2, 5.2.17, 5.3.3, 5.4.17, 5.4.23, 5.5.15, 5.5.21, 5.5.24, 5.6.12, 7.0.6
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 4 [1] => 3 [2] => 1 [3] => 2 )
Output for 5.2.0, 5.2.5, 5.3.26, 7.0.5
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 1 [1] => 4 [2] => 3 [3] => 2 )
Output for 5.5.0, 5.5.9, 5.6.20, 7.0.3
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 1 [1] => 3 [2] => 4 [3] => 2 )
Output for 4.4.4, 5.1.6, 5.2.12, 5.4.24, 5.6.4, 7.0.2
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 4 [1] => 2 [2] => 1 [3] => 3 )
Output for 4.3.0, 4.4.6, 5.1.2, 5.4.14, 5.4.22, 5.4.25, 5.5.6, 5.5.12, 5.5.18, 5.5.22, 5.6.5, 7.0.0
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 4 [1] => 1 [2] => 3 [3] => 2 )
Output for 4.3.2, 4.4.8, 5.0.0, 5.1.0, 5.3.0, 5.3.10, 5.3.23, 5.4.28, 5.4.34, 5.4.40, 5.6.13, 5.6.28
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 1 [1] => 2 [2] => 4 [3] => 3 )
Output for 5.0.2, 5.2.16, 5.4.10, 5.4.30, 5.4.45, 5.5.7, 5.5.19, 5.5.33, 5.6.15, 5.6.19
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 2 [1] => 4 [2] => 3 [3] => 1 )
Output for 5.3.2, 5.3.9, 5.4.36, 5.4.41, 5.5.4, 5.5.8, 5.5.11, 5.5.23, 5.5.31, 5.5.35, 5.6.8, 5.6.18
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 3 [1] => 4 [2] => 2 [3] => 1 )
Output for 4.4.3, 4.4.5, 5.2.6, 5.2.9, 5.3.19, 5.4.11, 5.5.25, 5.5.28, 5.6.17
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 4 [1] => 3 [2] => 2 [3] => 1 )
Output for 4.3.11, 5.3.13, 5.3.22, 5.4.6, 5.4.9, 5.5.29, 5.6.7, 5.6.10, 5.6.14
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 2 [1] => 1 [2] => 3 [3] => 4 )
Output for 5.1.1, 5.2.11, 5.3.4, 5.3.6, 5.3.8, 5.4.8, 5.5.1, 5.5.32, 5.5.34, 5.6.11
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 3 [1] => 1 [2] => 2 [3] => 4 )
Output for 5.2.13, 5.3.29, 5.5.27, 5.6.2
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 3 [1] => 2 [2] => 1 [3] => 4 )
Output for 5.3.5, 5.3.24 - 5.3.25, 5.4.3, 5.4.5, 5.5.26, 5.6.1
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 2 [1] => 1 [2] => 4 [3] => 3 )
Output for 4.3.5, 4.3.10, 5.2.10, 5.3.18, 5.4.44, 5.5.3, 5.6.0
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 3 [1] => 2 [2] => 4 [3] => 1 )
Output for 4.3.8, 5.1.5, 5.3.1, 5.3.7, 5.3.12, 5.4.42, 5.5.5, 5.5.30
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 1 )
Output for 4.3.7, 5.1.4, 5.4.31, 5.4.43, 5.5.20
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 3 [1] => 1 [2] => 4 [3] => 2 )
Output for 4.4.1, 5.3.14, 5.3.28, 5.4.7, 5.4.27, 5.4.35, 5.5.2, 5.5.16
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 4 [1] => 1 [2] => 2 [3] => 3 )
Output for 4.3.1, 4.3.9, 5.2.14, 5.3.17, 5.3.27, 5.4.13, 5.4.16, 5.4.39, 5.5.14
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 1 [1] => 3 [2] => 2 [3] => 4 )
Output for 4.4.0, 5.0.1, 5.2.4, 5.4.26, 5.5.13
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 4 [1] => 2 [2] => 3 [3] => 1 )
Output for 5.4.12, 5.4.15, 5.4.32
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 2 [1] => 3 [2] => 1 [3] => 4 )
Output for 5.0.5, 5.2.15, 5.3.15, 5.4.18 - 5.4.19
20Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) Array ( [0] => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 ) Array ( [0] => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 ) Array ( [0] => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 ) Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 )