3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [0, 1, 2]; $ref =& $array; // Necessary to trigger the old behavior $i = 0; foreach ($array as $k => &$val) { $i++; echo $val . ' '; if($i < 5 && !isset($array[$i])) $array[$i] = $val+1; if($i == 2) array_unshift($array, 'X'); } echo PHP_EOL . json_encode($array);

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)
8.3.60.0070.01016.75
8.3.50.0080.01021.08
8.3.40.0140.00318.77
8.3.30.0060.01318.49
8.3.20.0000.00720.13
8.3.10.0050.00323.56
8.3.00.0000.00719.68
8.2.180.0150.00718.29
8.2.170.0140.00022.96
8.2.160.0130.00320.47
8.2.150.0080.00024.18
8.2.140.0050.00324.66
8.2.130.0000.00826.16
8.2.120.0060.00317.63
8.2.110.0110.00021.98
8.2.100.0040.00817.63
8.2.90.0040.00419.17
8.2.80.0050.00317.97
8.2.70.0050.00317.48
8.2.60.0040.00417.91
8.2.50.0030.00518.07
8.2.40.0000.00821.16
8.2.30.0030.00619.85
8.2.20.0080.00017.70
8.2.10.0040.00417.98
8.2.00.0000.00717.98
8.1.280.0060.00925.92
8.1.270.0000.00720.25
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0060.00322.46
8.1.230.0080.00417.48
8.1.220.0030.00517.74
8.1.210.0050.00318.77
8.1.200.0040.00817.48
8.1.190.0090.00017.13
8.1.180.0050.00218.10
8.1.170.0030.00618.46
8.1.160.0070.00022.00
8.1.150.0030.00518.88
8.1.140.0000.00817.43
8.1.130.0030.00317.69
8.1.120.0040.00417.35
8.1.110.0000.00717.35
8.1.100.0080.00017.40
8.1.90.0000.00717.51
8.1.80.0000.00717.39
8.1.70.0040.00417.32
8.1.60.0000.00717.60
8.1.50.0000.00817.50
8.1.40.0000.00817.54
8.1.30.0030.00517.65
8.1.20.0000.00817.52
8.1.10.0050.00317.54
8.1.00.0080.00017.55
8.0.300.0040.00418.77
8.0.290.0000.00716.75
8.0.280.0030.00318.43
8.0.270.0000.00717.23
8.0.260.0000.00717.14
8.0.250.0040.00416.94
8.0.240.0040.00416.81
8.0.230.0030.00316.93
8.0.220.0000.00716.89
8.0.210.0040.00416.85
8.0.200.0000.00716.81
8.0.190.0050.00216.85
8.0.180.0040.00416.80
8.0.170.0000.00816.89
8.0.160.0030.00316.93
8.0.150.0030.00316.83
8.0.140.0040.00316.72
8.0.130.0060.00013.35
8.0.120.0050.00216.83
8.0.110.0000.00716.87
8.0.100.0040.00416.86
8.0.90.0070.00016.67
8.0.80.0040.01216.87
8.0.70.0040.00416.68
8.0.60.0050.00216.75
8.0.50.0000.00716.81
8.0.30.0140.00517.29
8.0.20.0100.00917.40
8.0.10.0000.00716.89
8.0.00.0060.01616.76
7.4.330.0030.00315.08
7.4.320.0000.00616.52
7.4.300.0070.00016.39
7.4.290.0000.00716.50
7.4.280.0050.00316.57
7.4.270.0070.00016.51
7.4.260.0040.00416.57
7.4.250.0040.00416.60
7.4.240.0030.00316.47
7.4.230.0030.00316.58
7.4.220.0100.00916.50
7.4.210.0060.00916.64
7.4.200.0030.00316.57
7.4.160.0150.00316.44
7.4.150.0110.00717.40
7.4.140.0120.00717.86
7.4.130.0090.01016.48
7.4.120.0060.01016.51
7.4.110.0110.00616.54
7.4.100.0060.01216.47
7.4.90.0120.00616.43
7.4.80.0120.00919.39
7.4.70.0100.00716.45
7.4.60.0130.00316.55
7.4.50.0000.00916.62
7.4.40.0110.01116.43
7.4.30.0150.00316.59
7.4.00.0070.00714.90
7.3.330.0060.00013.02
7.3.320.0030.00313.01
7.3.310.0040.00416.10
7.3.300.0070.00016.14
7.3.290.0000.00616.24
7.3.280.0100.01016.27
7.3.270.0060.01217.40
7.3.260.0100.00616.41
7.3.250.0080.01116.40
7.3.240.0120.00616.47
7.3.230.0120.00416.61
7.3.210.0070.01016.49
7.3.200.0070.01016.63
7.3.190.0060.01216.57
7.3.180.0100.00516.37
7.3.170.0130.00716.36
7.3.160.0080.01116.58
7.3.10.0060.00616.35
7.3.00.0070.00716.32
7.2.330.0150.00416.37
7.2.320.0080.01116.84
7.2.310.0100.00916.51
7.2.300.0090.00716.86
7.2.290.0110.01416.68
7.2.130.0140.00016.95
7.2.120.0070.00716.69
7.2.110.0030.01016.98
7.2.100.0030.01317.13
7.2.90.0060.00617.06
7.2.80.0000.01316.63
7.2.70.0000.00916.80
7.2.60.0080.00416.87
7.2.50.0090.00616.97
7.2.40.0090.00616.82
7.2.30.0000.00916.95
7.2.20.0070.01017.04
7.2.10.0120.00616.91
7.2.00.0070.00618.12
7.1.250.0030.00915.80
7.1.200.0080.00815.89
7.1.100.0040.00818.19
7.1.70.0030.00317.26
7.1.60.0150.00020.03
7.1.50.0070.01417.00
7.1.00.0030.07722.44
7.0.200.0030.00516.71
7.0.90.0000.04719.93
7.0.80.0170.07019.87
7.0.70.0530.08319.93
7.0.60.0530.08720.02
7.0.50.0530.05720.35
7.0.40.0070.08019.96
7.0.30.0070.08320.09
7.0.20.0070.04320.11
7.0.10.0070.08720.17
7.0.00.0330.05720.14
5.6.280.0000.06721.14
5.6.240.0070.05320.63
5.6.230.0170.07320.59
5.6.220.0030.08320.64
5.6.210.0070.08020.68
5.6.200.0030.07721.00
5.6.190.0100.07020.98
5.6.180.0030.08021.16
5.6.170.0130.07021.04
5.6.160.0070.07721.07
5.6.150.0070.08321.02
5.6.140.0070.05021.13
5.6.130.0030.08721.03
5.6.120.0100.08321.10
5.6.110.0000.08721.10
5.6.100.0070.06721.06
5.6.90.0000.06321.14
5.6.80.0030.08320.43
5.6.70.0070.07320.31
5.6.60.0070.07320.38
5.6.50.0070.08020.40
5.6.40.0100.07720.40
5.6.30.0000.04720.43
5.6.20.0070.06020.46
5.6.10.0030.04720.36
5.6.00.0070.08020.39
5.5.380.0000.05020.35
5.5.370.0100.06320.35
5.5.360.0200.06320.34
5.5.350.0030.08320.48
5.5.340.0070.08020.89
5.5.330.0100.08020.92
5.5.320.0070.08020.83
5.5.310.0070.05020.92
5.5.300.0200.06720.86
5.5.290.0000.04720.88
5.5.280.0000.05020.88
5.5.270.0070.08320.63
5.5.260.0000.05020.87
5.5.250.0170.07320.54
5.5.240.0170.07320.02
5.5.230.0070.08320.17
5.5.220.0030.06320.26
5.5.210.0000.09020.21
5.5.200.0100.06720.25
5.5.190.0070.06720.11
5.5.180.0070.06720.22
5.5.160.0070.06020.24
5.5.150.0030.04720.22
5.5.140.0230.05020.18
5.5.130.0100.07020.22
5.5.120.0130.08020.11
5.5.110.0030.08320.23
5.5.100.0030.05020.07
5.5.90.0070.05720.12
5.5.80.0000.08020.14
5.5.70.0100.03720.06
5.5.60.0070.07720.05
5.5.50.0100.07020.13
5.5.40.0130.04020.11
5.5.30.0070.06319.94
5.5.20.0000.08320.14
5.5.10.0100.07720.07
5.5.00.0100.04319.96
5.4.450.0070.06319.29
5.4.440.0000.04719.27
5.4.430.0170.04019.52
5.4.420.0000.05319.37
5.4.410.0070.07319.39
5.4.400.0070.05718.97
5.4.390.0130.07318.96
5.4.380.0000.08319.14
5.4.370.0030.04719.07
5.4.360.0000.08719.07
5.4.350.0100.06018.95
5.4.340.0070.03718.96
5.4.320.0000.04319.04
5.4.310.0030.07319.16
5.4.300.0100.07319.22
5.4.290.0100.07318.81
5.4.280.0130.07318.78
5.4.270.0130.07018.95
5.4.260.0070.07018.96
5.4.250.0130.06718.94
5.4.240.0000.05719.22
5.4.230.0070.03319.11
5.4.220.0000.08018.89
5.4.210.0130.07019.05
5.4.200.0070.07318.97
5.4.190.0100.07019.21
5.4.180.0030.04318.77
5.4.170.0100.07719.04
5.4.160.0030.08318.95
5.4.150.0070.04318.94
5.4.140.0000.06316.29
5.4.130.0030.05316.23
5.4.120.0170.06316.31
5.4.110.0070.07016.42
5.4.100.0030.07316.21
5.4.90.0100.05716.22
5.4.80.0170.03716.19
5.4.70.0000.07016.40
5.4.60.0100.07316.21
5.4.50.0070.05316.32
5.4.40.0070.07016.26
5.4.30.0130.06316.30
5.4.20.0030.07016.13
5.4.10.0100.04316.24
5.4.00.0100.07315.74

preferences:
61.26 ms | 401 KiB | 5 Q