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[] = array(); $group_order[] = mt_rand(1,4); while(count($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)
7.2.00.0070.00419.52
7.1.70.0000.00817.21
7.1.60.0140.01019.17
7.1.50.0100.01316.80
7.1.00.0030.06322.51
7.0.200.0000.00716.94
7.0.140.0070.07321.92
7.0.100.0130.06720.08
7.0.90.0000.06319.97
7.0.80.0070.06320.02
7.0.70.0070.04020.06
7.0.60.0000.07019.97
7.0.50.0070.04320.33
7.0.40.0000.04720.13
7.0.30.0170.08320.18
7.0.20.0030.08719.98
7.0.10.0170.08020.07
7.0.00.0130.08020.04
5.6.280.0100.06720.91
5.6.250.0030.04320.80
5.6.240.0130.05320.61
5.6.230.0030.07320.69
5.6.220.0030.05020.59
5.6.210.0030.04320.57
5.6.200.0000.05320.97
5.6.190.0030.05721.04
5.6.180.0030.06021.19
5.6.170.0000.07021.02
5.6.160.0100.08020.96
5.6.150.0130.07721.02
5.6.140.0000.07021.06
5.6.130.0100.08320.97
5.6.120.0130.07721.13
5.6.110.0030.09020.94
5.6.100.0070.06321.09
5.6.90.0030.06021.13
5.6.80.0000.08320.45
5.6.70.0170.07020.43
5.6.60.0100.08020.43
5.6.50.0230.06320.40
5.6.40.0170.07320.45
5.6.30.0130.07720.32
5.6.20.0130.07720.34
5.6.10.0130.07320.36
5.6.00.0100.08020.42
5.5.380.0070.06020.44
5.5.370.0100.04020.43
5.5.360.0130.07020.45
5.5.350.0070.04720.43
5.5.340.0000.04720.89
5.5.330.0000.04720.91
5.5.320.0070.04020.80
5.5.310.0070.05020.84
5.5.300.0200.07020.85
5.5.290.0100.08320.75
5.5.280.0130.07320.89
5.5.270.0030.09020.79
5.5.260.0170.08320.73
5.5.250.0070.04720.46
5.5.240.0100.06320.16
5.5.230.0100.07720.23
5.5.220.0030.07020.14
5.5.210.0130.08020.21
5.5.200.0100.07320.13
5.5.190.0170.06720.29
5.5.180.0100.08320.17
5.5.160.0070.08320.13
5.5.150.0100.08020.16
5.5.140.0170.07720.19
5.5.130.0130.07020.23
5.5.120.0170.07020.30
5.5.110.0070.08020.23
5.5.100.0000.08320.13
5.5.90.0100.07320.11
5.5.80.0200.07020.18
5.5.70.0030.08720.10
5.5.60.0030.06019.95
5.5.50.0170.06720.11
5.5.40.0100.07320.01
5.5.30.0070.08019.97
5.5.20.0070.08020.06
5.5.10.0100.08020.04
5.5.00.0130.07020.07
5.4.450.0130.07319.37
5.4.440.0100.07719.41
5.4.430.0070.08719.37
5.4.420.0230.06019.46
5.4.410.0030.07719.23
5.4.400.0130.08319.14
5.4.390.0100.07719.04
5.4.380.0130.06319.04
5.4.370.0130.07718.95
5.4.360.0170.06719.18
5.4.350.0100.06719.21
5.4.340.0000.08719.05
5.4.320.0130.06319.12
5.4.310.0030.08019.03
5.4.300.0130.07319.20
5.4.290.0130.06719.18
5.4.280.0100.07719.16
5.4.270.0130.08319.15
5.4.260.0130.07718.87
5.4.250.0070.08019.04
5.4.240.0070.06019.09
5.4.230.0130.07019.08
5.4.220.0070.08019.21
5.4.210.0100.07319.08
5.4.200.0170.06719.12
5.4.190.0170.05319.17
5.4.180.0100.07319.02
5.4.170.0030.08019.02
5.4.160.0100.07319.02
5.4.150.0070.07319.16
5.4.140.0070.07016.48
5.4.130.0070.05716.42
5.4.120.0170.07016.41
5.4.110.0130.07316.34
5.4.100.0030.08016.52
5.4.90.0130.06716.47
5.4.80.0070.07016.50
5.4.70.0100.07016.38
5.4.60.0070.07016.42
5.4.50.0130.06716.46
5.4.40.0070.07716.44
5.4.30.0070.07716.43
5.4.20.0100.07316.29
5.4.10.0200.06716.25
5.4.00.0030.08015.90
5.3.290.0100.07714.67
5.3.280.0070.07314.65
5.3.270.0030.07314.73
5.3.260.0070.08314.64
5.3.250.0100.07014.61
5.3.240.0070.07314.63
5.3.230.0070.08014.60
5.3.220.0070.07014.68
5.3.210.0100.07314.70
5.3.200.0070.07714.65
5.3.190.0100.07714.67
5.3.180.0100.07314.68
5.3.170.0170.07014.59
5.3.160.0100.06314.71
5.3.150.0070.07714.57
5.3.140.0070.06714.70
5.3.130.0070.05314.60
5.3.120.0130.06714.49
5.3.110.0030.07014.59
5.3.100.0100.07314.03
5.3.90.0100.08014.16
5.3.80.0030.08014.16
5.3.70.0030.08014.17
5.3.60.0030.07714.16
5.3.50.0100.07014.02
5.3.40.0100.07314.01
5.3.30.0130.06313.84
5.3.20.0100.07013.63
5.3.10.0100.07013.62
5.3.00.0100.06313.58
5.2.170.0100.06011.26
5.2.160.0100.06311.30
5.2.150.0030.06011.08
5.2.140.0070.06011.03
5.2.130.0030.05711.04
5.2.120.0100.05311.18
5.2.110.0130.05711.22
5.2.100.0030.05011.21
5.2.90.0000.06711.22
5.2.80.0130.05311.11
5.2.70.0070.06311.14
5.2.60.0030.05311.14
5.2.50.0030.06311.14
5.2.40.0070.06011.02
5.2.30.0000.05011.02
5.2.20.0070.06011.09
5.2.10.0100.05311.00
5.2.00.0070.04310.81
5.1.60.0070.04310.01
5.1.50.0100.05010.05
5.1.40.0200.02010.05
5.1.30.0030.05310.34
5.1.20.0100.05310.39
5.1.10.0070.06010.08
5.1.00.0070.05010.08
5.0.50.0070.0439.64
5.0.40.0030.0409.64
5.0.30.0070.0539.64
5.0.20.0000.0509.64
5.0.10.0030.0409.64
5.0.00.0100.0579.64
4.4.90.0100.0279.64
4.4.80.0070.0339.64
4.4.70.0070.0339.64
4.4.60.0030.0379.64
4.4.50.0030.0379.64
4.4.40.0000.0609.64
4.4.30.0000.0379.64
4.4.20.0030.0379.64
4.4.10.0070.0339.64
4.4.00.0000.0609.64
4.3.110.0030.0339.64
4.3.100.0000.0309.64
4.3.90.0100.0339.64
4.3.80.0000.0539.64
4.3.70.0030.0379.64
4.3.60.0070.0309.64
4.3.50.0030.0379.64
4.3.40.0000.0609.64
4.3.30.0030.0379.64
4.3.20.0030.0379.64
4.3.10.0070.0279.64
4.3.00.0000.0339.64

preferences:
35.97 ms | 401 KiB | 5 Q