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]); print_r($a); }elseif ($value == 2){ $idx = mt_rand(0,(count($b)-1)); $new_arr[] = $b[$idx]; unset($b[$idx]); print_r($b); }elseif ($value == 3){ $idx = mt_rand(0,(count($c)-1)); $new_arr[] = $c[$idx]; unset($c[$idx]); print_r($c); }elseif ($value == 4){ $idx = mt_rand(0,(count($d)-1)); $new_arr[] = $d[$idx]; unset($d[$idx]); print_r($d); } } } print_r($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)
7.4.00.0110.00715.10
7.3.120.0070.01015.02
7.3.110.0000.01214.96
7.3.100.0060.01014.87
7.3.90.0030.01014.92
7.3.80.0070.00714.91
7.3.70.0100.00714.80
7.3.60.0090.00314.96
7.3.50.0060.00614.96
7.3.40.0000.01614.85
7.3.30.0070.01114.68
7.3.20.0100.00316.42
7.3.10.0050.01016.69
7.3.00.0080.00516.74
7.2.250.0090.00915.35
7.2.240.0040.01415.31
7.2.230.0030.00915.34
7.2.220.0030.01315.25
7.2.210.0000.01714.79
7.2.200.0130.00314.87
7.2.190.0100.00715.09
7.2.180.0100.00015.18
7.2.170.0120.00614.76
7.2.130.0080.00616.68
7.2.120.0040.01117.02
7.2.110.0110.00317.12
7.2.100.0000.01716.79
7.2.90.0000.01217.22
7.2.80.0030.00816.75
7.2.70.0040.01116.78
7.2.60.0080.00816.94
7.2.50.0030.01017.07
7.2.40.0070.00716.86
7.2.30.0030.00917.10
7.2.20.0030.00916.84
7.2.10.0080.00617.05
7.2.00.0030.01018.31
7.1.330.0060.01015.93
7.1.320.0100.00315.75
7.1.310.0000.01015.60
7.1.300.0100.00715.75
7.1.290.0090.00615.67
7.1.280.0000.01515.88
7.1.270.0000.01315.97
7.1.260.0030.01015.84
7.1.250.0030.00615.95
7.1.70.0000.00717.22
7.1.60.0120.01219.17
7.1.50.0220.00916.79
7.1.00.0030.05722.45
7.0.200.0060.00616.61
7.0.140.0030.07322.15
7.0.60.0230.07319.89
7.0.50.0070.03717.90
7.0.40.0170.06720.30
7.0.30.0570.04320.19
7.0.20.0170.05320.07
7.0.10.0300.08320.27
7.0.00.0030.04720.19
5.6.280.0070.07320.79
5.6.210.0130.07720.77
5.6.200.0070.05318.28
5.6.190.0100.08320.60
5.6.180.0300.07720.57
5.6.170.0300.04720.54
5.6.160.0000.04320.51
5.6.150.0070.08318.17
5.6.140.0030.07018.18
5.6.130.0070.04018.15
5.6.120.0030.06320.98
5.6.110.0000.04321.13
5.6.100.0170.07321.00
5.6.90.0100.05720.94
5.6.80.0130.05720.50
5.6.70.3800.04720.52
5.5.350.0230.06320.54
5.5.340.0100.03718.03
5.5.330.0100.07320.35
5.5.320.0230.09020.41
5.5.310.0200.08720.26
5.5.300.0070.04717.98
5.5.290.0130.08017.98
5.5.280.0100.08020.77
5.5.270.0070.08320.90
5.5.260.0070.04720.90
5.5.250.0070.07020.51
5.5.240.0200.06720.29
5.4.450.4000.04019.48
5.4.440.0100.07019.47
5.4.430.1700.06719.28
5.4.420.4570.03719.56
5.4.410.4330.03719.44
5.4.400.4300.03319.13
5.4.390.3930.03719.10
5.4.380.4130.04719.16
5.4.370.0100.07319.19
5.4.360.2970.04719.06
5.4.350.3930.03019.04
5.4.340.2970.04018.96
5.4.320.4670.03318.93
5.4.310.4230.03719.24
5.4.300.2070.04319.05
5.4.290.0130.04319.23
5.4.280.0100.05719.22
5.4.270.4630.03719.15
5.4.260.4600.04018.96
5.4.250.3830.04319.18
5.4.240.4030.03319.21
5.4.230.4000.04319.09
5.4.220.3430.04019.14
5.4.210.3930.03719.05
5.4.200.3800.03319.23
5.4.190.4030.03318.95
5.4.180.3930.03719.02
5.4.170.3970.03019.00
5.4.160.4400.03719.13
5.4.150.3370.04019.02
5.4.140.3400.03316.39
5.4.130.3100.02716.46
5.4.120.3330.03016.42
5.4.110.3330.04316.44
5.4.100.2930.04016.23
5.4.90.3730.02716.57
5.4.80.4070.04016.36
5.4.70.3970.02716.50
5.4.60.4030.02716.42
5.4.50.4530.04316.53
5.4.40.3770.03016.50
5.4.30.4430.04016.53
5.4.20.4500.05316.34
5.4.10.4070.02716.49
5.4.00.4130.04316.02
5.3.290.4700.03714.68
5.3.280.4900.04714.68
5.3.270.3770.04314.63
5.3.260.4000.03714.77
5.3.250.3830.03714.52
5.3.240.3370.03714.62
5.3.230.4230.04714.77
5.3.220.3400.03314.61
5.3.210.3470.03314.62
5.3.200.3370.04014.66
5.3.190.3470.03714.64
5.3.180.3730.03314.58
5.3.170.3430.03714.58
5.3.160.4470.03714.58
5.3.150.4230.04014.60
5.3.140.4200.02714.64
5.3.130.3800.03314.57
5.3.120.3630.03314.56
5.3.110.3300.03314.64
5.3.100.3970.04014.05
5.3.90.3370.04014.06
5.3.80.3970.03314.07
5.3.70.3900.04013.96
5.3.60.3600.04014.07
5.3.50.3800.03314.00
5.3.40.3870.03014.04
5.3.30.4630.03314.09
5.3.20.4500.04013.77
5.3.10.3770.03013.67
5.3.00.3630.03013.71
5.2.170.3100.03011.18
5.2.160.3000.03311.32
5.2.150.3730.03711.23
5.2.140.3800.03711.17
5.2.130.4030.01711.16
5.2.120.3570.03311.14
5.2.110.2970.03311.29
5.2.100.4200.03311.12
5.2.90.3900.03011.16
5.2.80.3800.03011.18
5.2.70.3700.03011.00
5.2.60.3800.02711.24
5.2.50.3900.02310.93
5.2.40.3200.03011.05
5.2.30.3030.03010.95
5.2.20.3070.02710.99
5.2.10.3270.02710.84
5.2.00.3230.02710.77
5.1.60.3230.02010.06
5.1.50.2970.03310.02
5.1.40.2700.0279.95
5.1.30.2600.02710.37
5.1.20.2630.02310.34
5.1.10.2770.02710.24
5.1.00.2970.02310.09
5.0.50.1630.0238.56
5.0.40.1600.0238.59
5.0.30.1670.0338.16
5.0.20.1530.0208.23
5.0.10.1470.0308.27
5.0.00.1700.0338.10
4.4.90.1830.0177.60
4.4.80.1800.0177.60
4.4.70.1730.0177.60
4.4.60.1500.0107.60
4.4.50.1800.0177.60
4.4.40.1670.0237.65
4.4.30.1500.0137.70
4.4.20.1470.0177.70
4.4.10.1470.0137.70
4.4.00.1700.0307.70
4.3.110.1530.0137.70
4.3.100.1600.0177.70
4.3.90.1500.0207.70
4.3.80.1600.0277.70
4.3.70.1630.0177.70
4.3.60.1230.0177.70
4.3.50.1630.0137.70
4.3.40.1430.0307.70
4.3.30.0970.0207.70
4.3.20.0930.0177.70
4.3.10.0930.0207.70
4.3.00.0970.0207.70

preferences:
32.66 ms | 401 KiB | 5 Q