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(); $group_order[] = array(); while(count($new_arr)<$size){ foreach ($group_order as $i => $value) { unset($group_order[$i]); } $group_order = array_values($group_order); $group_order[] = mt_rand(1,4); while(count($group_order)<4){ $x=mt_rand(1,4); if(in_array($x,$group_order) == false){ $group_order[] = $x; } } $temp = $group_order; print_r($temp); 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)
7.1.70.0050.00217.09
7.1.60.0110.01419.17
7.1.50.0040.01216.72
7.1.00.0000.03722.40
7.0.200.0040.00416.52
7.0.140.0070.07321.96
7.0.110.0030.08720.10
7.0.100.0100.04720.02
7.0.90.0270.06719.92
7.0.80.0070.04320.08
7.0.70.0130.04719.97
7.0.60.0230.06720.03
7.0.50.0230.03720.41
7.0.40.0070.04020.19
7.0.30.0100.03720.15
7.0.20.0000.04720.21
7.0.10.0030.04320.18
7.0.00.0100.05320.11
5.6.280.0000.07720.83
5.6.250.0100.06720.69
5.6.240.0130.04020.87
5.6.230.0030.04020.64
5.6.220.0000.07720.58
5.6.210.0170.05320.63
5.6.200.0030.04321.00
5.6.190.0070.04021.23
5.6.180.0070.04021.30
5.6.170.0030.04021.15
5.6.160.0130.03721.13
5.6.150.0100.06320.94
5.6.140.0070.04021.04
5.6.130.0000.05320.95
5.6.120.0070.05321.23
5.6.110.0070.04320.96
5.6.100.0030.05321.14
5.6.90.0170.07321.04
5.6.80.0130.07320.39
5.6.70.0070.07020.41
5.6.60.0070.08020.63
5.6.50.0100.07320.51
5.6.40.0100.06720.59
5.6.30.0070.08020.49
5.6.20.0130.07020.32
5.6.10.0130.07320.35
5.6.00.0200.06320.30
5.5.380.0100.03320.47
5.5.370.0070.04320.39
5.5.360.0070.05320.54
5.5.350.0030.04020.48
5.5.340.0100.03720.88
5.5.330.0070.03720.90
5.5.320.0030.04321.01
5.5.310.0070.06321.03
5.5.300.0200.06720.79
5.5.290.0030.04020.95
5.5.280.0000.04721.03
5.5.270.0000.06320.90
5.5.260.0000.08020.95
5.5.250.0070.08020.63
5.5.240.0100.07320.23
5.5.230.0100.08020.41
5.5.220.0030.08320.23
5.5.210.0100.07720.33
5.5.200.0100.07720.11
5.5.190.0100.04720.23
5.5.180.0130.07320.36
5.5.160.0070.08320.17
5.5.150.0030.08020.31
5.5.140.0100.08020.30
5.5.130.0100.08320.28
5.5.120.0100.08020.26
5.5.110.0200.06320.34
5.5.100.0070.08020.07
5.5.90.0030.07020.16
5.5.80.0100.07720.20
5.5.70.0100.07720.25
5.5.60.0100.04320.05
5.5.50.0070.08020.25
5.5.40.0130.07320.10
5.5.30.0070.08319.97
5.5.20.0100.06320.18
5.5.10.0100.05720.01
5.5.00.0070.07320.17
5.4.450.0000.04019.64
5.4.440.0030.06719.58
5.4.430.0100.06319.35
5.4.420.0100.06719.46
5.4.410.0130.07719.53
5.4.400.0100.07319.01
5.4.390.0170.06719.01
5.4.380.0100.07319.18
5.4.370.0100.04719.01
5.4.360.0100.06719.01
5.4.350.0170.06319.00
5.4.340.0070.07719.00
5.4.320.0130.06718.99
5.4.310.0030.08319.01
5.4.300.0130.07018.98
5.4.290.0230.06319.30
5.4.280.0130.06719.22
5.4.270.0100.06719.01
5.4.260.0130.07019.23
5.4.250.0130.06018.98
5.4.240.0170.06719.00
5.4.230.0100.05019.30
5.4.220.0070.07319.16
5.4.210.0130.07018.98
5.4.200.0100.07319.32
5.4.190.0100.06719.01
5.4.180.0070.07719.30
5.4.170.0070.07719.23
5.4.160.0070.07718.98
5.4.150.0100.05719.29
5.4.140.0230.06016.53
5.4.130.0130.06716.53
5.4.120.0070.07716.32
5.4.110.0070.07016.47
5.4.100.0000.08016.42
5.4.90.0070.07016.54
5.4.80.0170.06016.39
5.4.70.0100.06716.25
5.4.60.0100.06716.55
5.4.50.0130.06716.39
5.4.40.0100.05016.63
5.4.30.0000.06016.48
5.4.20.0100.07016.39
5.4.10.0030.07316.54
5.4.00.0170.06315.73
5.3.290.0030.07314.70
5.3.280.0030.07014.66
5.3.270.0070.07714.63
5.3.260.0030.08314.66
5.3.250.0130.05314.86
5.3.240.0100.07714.71
5.3.230.0030.08014.72
5.3.220.0030.07714.82
5.3.210.0170.06014.60
5.3.200.0070.07714.71
5.3.190.0100.06714.61
5.3.180.0130.06014.71
5.3.170.0070.07714.59
5.3.160.0070.07314.45
5.3.150.0030.07014.62
5.3.140.0070.07014.57
5.3.130.0100.06714.59
5.3.120.0100.07014.54
5.3.110.0070.08014.66
5.3.100.0070.07714.05
5.3.90.0070.07314.03
5.3.80.0030.08014.10
5.3.70.0100.04714.03
5.3.60.0070.07714.11
5.3.50.0100.06713.94
5.3.40.0100.06714.11
5.3.30.0070.07313.90
5.3.20.0130.06313.75
5.3.10.0130.07013.66
5.3.00.0000.08013.79
5.2.170.0030.06011.18
5.2.160.0000.06311.18
5.2.150.0030.07011.13
5.2.140.0070.06011.17
5.2.130.0100.05311.09
5.2.120.0030.06711.08
5.2.110.0070.05711.19
5.2.100.0130.05311.19
5.2.90.0100.05711.12
5.2.80.0000.06711.11
5.2.70.0030.06711.14
5.2.60.0030.06011.05
5.2.50.0100.06011.01
5.2.40.0130.04011.08
5.2.30.0030.06310.97
5.2.20.0130.05010.99
5.2.10.0070.06010.93
5.2.00.0030.06310.88
5.1.60.0100.04710.00
5.1.50.0070.05310.21
5.1.40.0000.0609.97
5.1.30.0030.06010.38
5.1.20.0100.05010.23
5.1.10.0030.0509.91
5.1.00.0030.05310.04
5.0.50.0030.0478.55
5.0.40.0000.0478.62
5.0.30.0030.0678.41
5.0.20.0030.0408.22
5.0.10.0000.0478.21
5.0.00.0030.0578.21
4.4.90.0030.0338.21
4.4.80.0070.0338.21
4.4.70.0000.0378.21
4.4.60.0000.0238.21
4.4.50.0070.0308.21
4.4.40.0070.0438.21
4.4.30.0030.0378.21
4.4.20.0030.0378.21
4.4.10.0030.0208.21
4.4.00.0000.0608.21
4.3.110.0000.0338.21
4.3.100.0000.0408.21
4.3.90.0000.0378.21
4.3.80.0000.0278.21
4.3.70.0000.0308.21
4.3.60.0070.0308.21
4.3.50.0030.0378.21
4.3.40.0030.0508.21
4.3.30.0000.0408.21
4.3.20.0030.0338.21
4.3.10.0000.0378.21
4.3.00.0030.0338.21

preferences:
37.34 ms | 401 KiB | 5 Q