3v4l.org

run code in 300+ PHP versions simultaneously
<?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); $new_arr = array(); $group_order[] = array(); $temp = 0; while(count($new_arr)<$size){ if (!empty($group_order)){ $temp = $group_order[3]; } foreach ($group_order as $i => $value) { unset($group_order[$i]); } $group_order = array_values($group_order); while(count($group_order)<4){ $x=mt_rand(1,4); if(in_array($x,$group_order) == false && $x != $temp){ $group_order[] = $x; $temp = 0; } } foreach ($group_order as $value){ if ($value == 1){ $idx = mt_rand(0,(count($a)-1)); $new_arr[] = $a[$idx]; unset($a[$idx]); $a = array_values($a); }elseif ($value == 2){ $idx = mt_rand(0,(count($b)-1)); $new_arr[] = $b[$idx]; unset($b[$idx]); $b = array_values($b); }elseif ($value == 3){ $idx = mt_rand(0,(count($c)-1)); $new_arr[] = $c[$idx]; unset($c[$idx]); $c = array_values($c); }elseif ($value == 4){ $idx = mt_rand(0,(count($d)-1)); $new_arr[] = $d[$idx]; unset($d[$idx]); $d = array_values($d); } } } print_r($new_arr); ?>

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
7.4.00.0060.01014.96
7.3.120.0000.01914.89
7.3.110.0060.01014.71
7.3.100.0120.00014.82
7.3.90.0070.00714.94
7.3.80.0120.00314.74
7.3.70.0030.01014.95
7.3.60.0070.00715.07
7.3.50.0090.00014.73
7.3.40.0090.00614.80
7.3.30.0070.00714.88
7.3.20.0070.01016.76
7.3.10.0060.00916.65
7.3.00.0040.01116.74
7.2.250.0070.01414.87
7.2.240.0100.01015.33
7.2.230.0080.00815.10
7.2.220.0060.00615.18
7.2.210.0070.00714.87
7.2.200.0030.01014.73
7.2.190.0120.00315.04
7.2.180.0060.00915.11
7.2.170.0100.00714.96
7.2.00.0090.00619.62
7.1.330.0090.00615.87
7.1.320.0030.01316.03
7.1.310.0000.00916.02
7.1.300.0060.00915.84
7.1.290.0030.00915.99
7.1.280.0040.01115.93
7.1.270.0030.01015.75
7.1.260.0030.01015.73
7.1.70.0030.00617.32
7.1.60.0030.02019.17
7.1.50.0160.01234.44
7.1.00.0070.05722.54
7.0.200.0030.00516.79
7.0.140.0000.07321.93
7.0.100.0270.06720.02
7.0.90.0000.05320.05
7.0.80.0130.03719.93
7.0.70.0070.03320.04
7.0.60.0170.04720.02
7.0.50.0070.04020.45
7.0.40.0130.03020.15
7.0.30.0030.04320.09
7.0.20.0070.04020.09
7.0.10.0000.04319.95
7.0.00.0030.04320.10
5.6.280.0000.07320.90
5.6.250.0070.07720.79
5.6.240.0130.06720.75
5.6.230.0030.05320.67
5.6.220.0030.04320.63
5.6.210.0070.04020.54
5.6.200.0100.07021.05
5.6.190.0070.04721.04
5.6.180.0070.04021.09
5.6.170.0130.04321.05
5.6.160.0070.04020.96
5.6.150.0070.04020.97
5.6.140.0030.04321.04
5.6.130.0030.04321.02
5.6.120.0070.04021.06
5.6.110.0070.04321.06
5.6.100.0030.04021.05
5.6.90.0030.04321.00
5.6.80.0070.03320.46
5.6.70.0030.08320.43
5.6.60.0200.06320.40
5.6.50.0100.06320.43
5.6.40.0130.03320.38
5.6.30.0030.05320.33
5.6.20.0130.06320.39
5.6.10.0130.05020.45
5.6.00.0100.09320.45
5.5.380.0130.07320.53
5.5.370.0030.04320.33
5.5.360.0000.04720.36
5.5.350.0100.02720.48
5.5.340.0070.03720.85
5.5.330.0030.04020.87
5.5.320.0000.04720.90
5.5.310.0030.04320.88
5.5.300.0070.04020.79
5.5.290.0070.03720.81
5.5.280.0030.04320.89
5.5.270.0100.03720.94
5.5.260.0030.05020.64
5.5.250.0030.04320.74
5.5.240.0200.04020.30
5.5.230.0030.08020.12
5.5.220.0130.07320.23
5.5.210.0170.06320.03
5.5.200.0100.06720.27
5.5.190.0030.08020.27
5.5.180.0170.06020.27
5.5.160.0070.06720.26
5.5.150.0130.07020.12
5.5.140.0100.08320.23
5.5.130.0100.08020.22
5.5.120.0030.05020.19
5.5.110.0130.05020.23
5.5.100.0100.07320.06
5.5.90.0130.03720.11
5.5.80.0130.07020.05
5.5.70.0070.06020.13
5.5.60.0000.05020.07
5.5.50.0130.07019.92
5.5.40.0170.03720.09
5.5.30.0030.08020.15
5.5.20.0100.07320.09
5.5.10.0130.05720.05
5.5.00.0030.07020.12
5.4.450.0030.04319.58
5.4.440.0030.05019.42
5.4.430.0030.04019.27
5.4.420.0100.03319.55
5.4.410.0100.02719.23
5.4.400.0100.05319.05
5.4.390.0170.07019.02
5.4.380.0130.07019.16
5.4.370.0100.06319.14
5.4.360.0070.04719.05
5.4.350.0100.06319.09
5.4.340.0030.07319.09
5.4.320.0070.05719.18
5.4.310.0070.05018.95
5.4.300.0070.07719.09
5.4.290.0130.07318.89
5.4.280.0100.05019.04
5.4.270.0170.06019.15
5.4.260.0100.04019.04
5.4.250.0130.06319.02
5.4.240.0030.04718.89
5.4.230.0030.09019.08
5.4.220.0100.07719.02
5.4.210.0030.04019.20
5.4.200.0070.08018.84
5.4.190.0200.05319.14
5.4.180.0070.07019.03
5.4.170.0130.04019.04
5.4.160.0130.04718.98
5.4.150.0100.07019.02
5.4.140.0070.07016.47
5.4.130.0070.04716.19
5.4.120.0000.07016.30
5.4.110.0030.04316.32
5.4.100.0130.07016.44
5.4.90.0100.06716.50
5.4.80.0100.05716.39
5.4.70.0070.04016.49
5.4.60.0100.05716.48
5.4.50.0030.03316.30
5.4.40.0030.07316.36
5.4.30.0070.05716.45
5.4.20.0070.07316.47
5.4.10.0070.07716.39
5.4.00.0100.07315.89
5.3.290.0030.06014.61
5.3.280.0030.04014.76
5.3.270.0200.06014.55
5.3.260.0070.04014.71
5.3.250.0070.05014.72
5.3.240.0030.07314.68
5.3.230.0030.07714.61
5.3.220.0070.06714.68
5.3.210.0170.06014.52
5.3.200.0100.07314.55
5.3.190.0070.04314.51
5.3.180.0130.05014.64
5.3.170.0030.07314.52
5.3.160.0000.04714.48
5.3.150.0070.06014.60
5.3.140.0030.07014.58
5.3.130.0100.07714.50
5.3.120.0070.07314.69
5.3.110.0070.07714.62
5.3.100.0100.07314.08
5.3.90.0070.06714.18
5.3.80.0130.05014.16
5.3.70.0130.06714.18
5.3.60.0070.05014.15
5.3.50.0070.04014.00
5.3.40.0000.05313.99
5.3.30.0100.07314.05
5.3.20.0100.06013.72
5.3.10.0030.05713.73
5.3.00.0100.06313.64
5.2.170.0030.03312.08
5.2.160.0100.05712.08
5.2.150.0000.03312.08
5.2.140.0030.06712.08
5.2.130.0070.05712.08
5.2.120.0100.03012.08
5.2.110.0000.03312.08
5.2.100.0170.05312.08
5.2.90.0130.05012.08
5.2.80.0100.05312.08
5.2.70.0030.05312.08
5.2.60.0070.05312.08
5.2.50.0070.04312.08
5.2.40.0070.05312.08
5.2.30.0030.05012.08
5.2.20.0000.06712.08
5.2.10.0030.05712.08
5.2.00.0030.06312.08
5.1.60.0070.02312.08
5.1.50.0030.02712.08
5.1.40.0030.03712.08
5.1.30.0030.05012.08
5.1.20.0070.05312.08
5.1.10.0100.05312.08
5.1.00.0030.04712.08
5.0.50.0030.02312.08
5.0.40.0070.03012.08
5.0.30.0070.05712.08
5.0.20.0100.04012.08
5.0.10.0070.02712.08
5.0.00.0030.06012.08
4.4.90.0000.04012.08
4.4.80.0000.04012.08
4.4.70.0000.03312.08
4.4.60.0070.03312.08
4.4.50.0030.03312.08
4.4.40.0030.04712.08
4.4.30.0000.03712.08
4.4.20.0030.03012.08
4.4.10.0030.03312.08
4.4.00.0030.05312.08
4.3.110.0030.03012.08
4.3.100.0030.02312.08
4.3.90.0030.02712.08
4.3.80.0070.04312.08
4.3.70.0130.02012.08
4.3.60.0030.03712.08
4.3.50.0030.03312.08
4.3.40.0000.03712.08
4.3.30.0030.01312.08
4.3.20.0030.01312.08
4.3.10.0030.01712.08
4.3.00.0030.01312.08

preferences:
33.23 ms | 400 KiB | 5 Q