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); $new_arr = array(); while(count($new_arr)<$size){ $group_order[] = mt_rand(1,4); while(count($group_order)<4){ $x=mt_rand(1,4); if(in_array($x,$group_order) == false){ $group_order[] = $x; } } print_r($group_order); 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)
7.2.00.0130.00019.60
7.1.70.0000.00917.34
7.1.60.0110.01519.17
7.1.50.0070.01816.82
7.1.00.0000.07722.51
7.0.200.0060.00316.97
7.0.140.0130.06721.95
7.0.100.0030.04319.99
7.0.90.0000.05719.92
7.0.80.0170.03719.89
7.0.70.0000.04720.01
7.0.60.0170.03319.87
7.0.50.0100.03720.24
7.0.40.0030.04320.04
7.0.30.0030.05320.17
7.0.20.0130.06320.08
7.0.10.0030.08020.09
7.0.00.0100.08020.02
5.6.280.0030.07720.83
5.6.250.0000.04720.74
5.6.240.0030.05320.64
5.6.230.0070.04020.46
5.6.220.0070.03720.50
5.6.210.0070.03720.58
5.6.200.0130.03321.13
5.6.190.0000.04721.03
5.6.180.0070.04021.02
5.6.170.0070.03720.97
5.6.160.0100.08320.95
5.6.150.0170.05021.15
5.6.140.0100.07321.04
5.6.130.0100.05021.05
5.6.120.0100.05021.08
5.6.110.0070.08321.03
5.6.100.0100.04321.10
5.6.90.0130.04021.00
5.6.80.0070.03720.36
5.6.70.0100.03320.39
5.6.60.0030.04020.43
5.6.50.0130.07320.38
5.6.40.0170.04720.45
5.6.30.0100.07720.45
5.6.20.0100.08020.47
5.6.10.0030.08720.44
5.6.00.0100.07320.39
5.5.380.0100.05320.31
5.5.370.0070.07020.41
5.5.360.0070.04320.37
5.5.350.0070.04720.39
5.5.340.0030.04320.84
5.5.330.0070.04020.90
5.5.320.0070.04020.77
5.5.310.0030.06020.80
5.5.300.0100.06720.81
5.5.290.0130.05720.77
5.5.280.0200.08020.74
5.5.270.0030.06320.88
5.5.260.0030.09020.88
5.5.250.0070.07720.70
5.5.240.0100.05720.25
5.5.230.0100.07020.26
5.5.220.0070.06020.16
5.5.210.0070.03720.18
5.5.200.0070.08320.23
5.5.190.0030.08020.22
5.5.180.0130.07720.00
5.5.160.0070.06320.21
5.5.150.0200.05320.21
5.5.140.0070.05320.25
5.5.130.0070.06320.13
5.5.120.0130.08020.12
5.5.110.0100.07720.24
5.5.100.0030.06720.11
5.5.90.0070.04719.93
5.5.80.0070.06320.05
5.5.70.0030.05020.09
5.5.60.0070.08020.16
5.5.50.0100.07020.07
5.5.40.0200.07320.09
5.5.30.0070.08020.10
5.5.20.0100.08019.97
5.5.10.0100.07719.98
5.5.00.0070.06720.03
5.4.450.0030.08019.38
5.4.440.0000.07719.36
5.4.430.0200.06719.36
5.4.420.0070.07019.35
5.4.410.0170.06719.07
5.4.400.0000.04018.91
5.4.390.0030.03718.90
5.4.380.0000.03718.87
5.4.370.0000.08018.85
5.4.360.0200.06319.03
5.4.350.0030.04019.03
5.4.340.0030.07719.15
5.4.320.0030.08719.00
5.4.310.0130.06718.86
5.4.300.0000.06719.11
5.4.290.0030.07319.02
5.4.280.0130.06718.86
5.4.270.0070.04719.20
5.4.260.0100.09019.11
5.4.250.0130.05319.13
5.4.240.0030.06319.03
5.4.230.0130.06718.87
5.4.220.0070.06719.04
5.4.210.0170.05719.15
5.4.200.0100.07319.04
5.4.190.0100.06718.86
5.4.180.0100.05718.89
5.4.170.0130.05719.16
5.4.160.0070.04319.02
5.4.150.0130.07019.01
5.4.140.0070.06316.38
5.4.130.0130.06316.36
5.4.120.0070.04316.37
5.4.110.0030.07316.42
5.4.100.0100.06016.27
5.4.90.0030.07316.46
5.4.80.0100.07016.47
5.4.70.0030.04316.49
5.4.60.0070.03716.46
5.4.50.0030.06316.49
5.4.40.0070.04316.41
5.4.30.0130.04316.36
5.4.20.0070.06316.29
5.4.10.0170.06716.30
5.4.00.0130.06715.85
5.3.290.0170.07015.71
5.3.280.0130.06315.71
5.3.270.0170.05315.71
5.3.260.0130.06315.71
5.3.250.0100.07015.71
5.3.240.0130.07015.71
5.3.230.0170.04015.71
5.3.220.0030.08015.71
5.3.210.0030.08015.71
5.3.200.0030.06315.71
5.3.190.0130.05015.71
5.3.180.0030.08015.71
5.3.170.0170.07015.71
5.3.160.0170.06715.71
5.3.150.0070.07715.71
5.3.140.0100.07315.71
5.3.130.0200.04315.71
5.3.120.0030.04315.71
5.3.110.0070.08015.71
5.3.100.0030.07315.71
5.3.90.0030.04315.71
5.3.80.0100.06015.71
5.3.70.0130.06715.71
5.3.60.0100.06715.71
5.3.50.0100.06715.71
5.3.40.0070.07315.71
5.3.30.0030.04015.71
5.3.20.0130.05715.71
5.3.10.0030.07015.71
5.3.00.0100.04715.71
5.2.170.0000.07015.71
5.2.160.0030.03315.71
5.2.150.0100.05315.71
5.2.140.0000.03715.71
5.2.130.0030.06015.71
5.2.120.0100.05715.71
5.2.110.0030.05015.71
5.2.100.0070.05015.71
5.2.90.0000.03315.71
5.2.80.0170.06015.71
5.2.70.0070.05715.71
5.2.60.0070.06315.71
5.2.50.0000.05315.71
5.2.40.0070.03315.71
5.2.30.0030.06315.71
5.2.20.0000.05315.71
5.2.10.0000.05315.71
5.2.00.0070.06315.71
5.1.60.0070.03015.71
5.1.50.0030.05315.71
5.1.40.0070.05015.71
5.1.30.0070.05315.71
5.1.20.0070.04315.71
5.1.10.0070.02715.71
5.1.00.0100.05315.71
5.0.50.0030.02315.71
5.0.40.0070.03315.71
5.0.30.0030.04715.71
5.0.20.0030.04715.71
5.0.10.0000.04715.71
5.0.00.0000.06015.71
4.4.90.0030.04015.71
4.4.80.0030.03015.71
4.4.70.0070.02015.71
4.4.60.0030.02715.71
4.4.50.0030.03315.71
4.4.40.0070.03315.71
4.4.30.0070.01315.71
4.4.20.0030.02015.71
4.4.10.0070.03315.71
4.4.00.0100.05015.71
4.3.110.0030.02715.71
4.3.100.0000.03015.71
4.3.90.0070.03015.71
4.3.80.0070.02315.71
4.3.70.0000.02315.71
4.3.60.0030.01715.71
4.3.50.0070.02315.71
4.3.40.0030.04715.71
4.3.30.0070.03015.71
4.3.20.0000.03315.71
4.3.10.0030.03315.71
4.3.00.0030.02715.71

preferences:
33.92 ms | 400 KiB | 5 Q