3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = ['one', 'two', 'three', 'four', 'five']; echo 'foreach on $arr' . PHP_EOL; foreach($arr as $elem) { var_dump(current($arr)); } echo PHP_EOL . 'foreach on $refArr' . PHP_EOL; $refArr = &$arr; foreach($refArr as $elem) { var_dump(current($arr)); } echo PHP_EOL . 'substituting array during iteration' . PHP_EOL; $refArr = &$arr; foreach($refArr as $elem) { if ($elem == 'three') { $arr = [1, 2, 3, 4, 5]; } echo $elem . PHP_EOL; }

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)
8.3.60.0040.01118.18
8.3.50.0140.00721.04
8.3.40.0180.00418.68
8.3.30.0110.00418.68
8.3.20.0060.00319.93
8.3.10.0050.00323.41
8.3.00.0000.00723.58
8.2.180.0070.00716.63
8.2.170.0110.00422.96
8.2.160.0030.01021.93
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0000.00826.16
8.2.120.0090.00017.50
8.2.110.0000.00919.39
8.2.100.0090.00317.78
8.2.90.0050.00519.22
8.2.80.0040.00417.97
8.2.70.0000.00817.50
8.2.60.0000.00817.93
8.2.50.0000.00818.07
8.2.40.0050.00519.37
8.2.30.0070.00017.94
8.2.20.0060.00317.66
8.2.10.0040.00417.92
8.2.00.0040.00418.02
8.1.280.0090.00925.92
8.1.270.0030.00520.39
8.1.260.0080.00026.35
8.1.250.0100.00728.09
8.1.240.0060.00321.26
8.1.230.0050.00617.42
8.1.220.0030.00517.74
8.1.210.0030.00618.77
8.1.200.0030.00617.35
8.1.190.0060.00317.35
8.1.180.0040.00418.10
8.1.170.0060.00318.57
8.1.160.0000.00722.03
8.1.150.0000.00718.89
8.1.140.0000.00717.44
8.1.130.0070.00017.61
8.1.120.0030.00317.47
8.1.110.0050.00217.34
8.1.100.0030.00517.48
8.1.90.0070.00017.48
8.1.80.0070.00017.43
8.1.70.0030.00317.46
8.1.60.0040.00417.54
8.1.50.0040.00417.44
8.1.40.0000.00817.45
8.1.30.0050.00317.46
8.1.20.0070.00017.49
8.1.10.0080.00017.49
8.1.00.0000.00817.45
8.0.300.0030.00518.77
8.0.290.0040.00416.63
8.0.280.0070.00018.43
8.0.270.0000.00717.20
8.0.260.0000.00817.13
8.0.250.0000.00717.00
8.0.240.0070.00016.96
8.0.230.0070.00017.00
8.0.220.0070.00316.93
8.0.210.0070.00016.79
8.0.200.0040.00416.99
8.0.190.0030.00516.91
8.0.180.0040.00417.00
8.0.170.0000.00716.94
8.0.160.0000.00816.99
8.0.150.0040.00416.96
8.0.140.0050.00216.83
8.0.130.0030.00313.30
8.0.120.0000.00816.82
8.0.110.0030.00516.82
8.0.100.0030.00516.84
8.0.90.0040.00416.96
8.0.80.0070.01016.87
8.0.70.0050.00216.73
8.0.60.0020.00516.76
8.0.50.0050.00216.89
8.0.30.0060.01317.17
8.0.20.0070.01217.40
8.0.10.0040.00417.02
8.0.00.0100.00916.79
7.4.330.0000.00515.08
7.4.320.0030.00316.44
7.4.300.0050.00316.60
7.4.290.0000.00716.65
7.4.280.0050.00516.55
7.4.270.0070.00016.56
7.4.260.0080.00016.45
7.4.250.0020.00516.55
7.4.240.0020.00516.55
7.4.230.0070.00016.39
7.4.220.0030.01616.51
7.4.210.0110.00316.61
7.4.200.0030.00316.51
7.4.160.0160.00016.57
7.4.150.0130.00617.40
7.4.140.0100.01117.86
7.4.130.0140.00716.59
7.4.120.0100.01016.52
7.4.110.0090.00916.45
7.4.100.0130.01316.48
7.4.90.0130.00316.54
7.4.80.0130.00419.39
7.4.70.0050.01116.40
7.4.60.0100.00616.50
7.4.50.0020.00516.46
7.4.40.0100.00716.64
7.4.30.0070.01016.66
7.4.00.0030.01015.15
7.3.330.0020.00213.17
7.3.320.0030.00313.11
7.3.310.0030.00316.13
7.3.300.0070.00016.17
7.3.290.0120.00716.27
7.3.280.0100.00816.27
7.3.270.0160.00817.40
7.3.260.0160.00016.56
7.3.250.0100.00816.50
7.3.240.0100.00616.65
7.3.230.0090.01516.46
7.3.210.0100.01016.28
7.3.200.0090.00816.32
7.3.190.0030.01216.41
7.3.180.0040.01216.16
7.3.170.0000.01716.28
7.3.160.0160.00616.59
7.2.330.0060.01316.33
7.2.320.0100.01416.51
7.2.310.0150.00316.30
7.2.300.0040.01216.67
7.2.290.0110.01116.51
7.2.80.0090.00316.38
7.2.60.0090.00616.84
7.2.00.0070.00719.32
7.1.200.0030.00915.80
7.1.100.0000.00918.01
7.1.70.0100.00616.57
7.1.60.0100.01319.12
7.1.50.0120.00616.86
7.1.00.0030.07722.27
7.0.200.0160.00314.63
7.0.60.0000.05320.02
7.0.50.0030.08317.77
7.0.40.0170.07020.23
7.0.30.0170.04020.09
7.0.20.0130.09020.16
7.0.10.0100.06020.13
7.0.00.0030.04020.09
5.6.280.0000.03321.15
5.6.210.0030.08020.48
5.6.200.0070.08018.21
5.6.190.0070.07720.60
5.6.180.0570.06720.57
5.6.170.0230.08320.48
5.6.160.0100.08020.48
5.6.150.0070.07718.22
5.6.140.0070.04718.11
5.6.130.0130.04318.10
5.6.120.0100.03321.14
5.6.110.0100.07321.02
5.6.100.0070.04021.10
5.6.90.0070.08721.12
5.6.80.0200.07720.38
5.5.350.0100.07720.52
5.5.340.0070.08317.95
5.5.330.0070.03720.43
5.5.320.0130.05020.30
5.5.310.0230.05020.29
5.5.300.0100.06317.96
5.5.290.0130.04017.98
5.5.280.0130.07720.89
5.5.270.0000.04320.74
5.5.260.0170.06020.77
5.5.250.0130.03720.61
5.5.240.0030.03020.28
5.4.450.0700.06319.46
5.4.440.0870.05319.68
5.4.430.0900.05019.48
5.4.420.0670.06319.64
5.4.410.0730.05019.50
5.4.400.0300.05319.32
5.4.390.0200.04719.14
5.4.380.0170.04719.29
5.4.370.0870.07019.28
5.4.360.0870.04319.31
5.4.350.0730.07719.14
5.4.340.0470.04719.17
5.4.320.0030.06719.15
5.4.310.0100.05319.16
5.4.300.1000.04319.12
5.4.290.0870.05718.80
5.4.280.1000.05019.14
5.4.270.0900.04718.77
5.4.260.0770.05019.28
5.4.250.0900.04719.30
5.4.240.0900.06019.15
5.4.230.0130.05718.77
5.4.220.0070.05719.22
5.4.210.0100.05019.06
5.4.200.0470.05316.65
5.4.190.0870.05019.13
5.4.180.0170.05018.81
5.4.170.0230.05318.96
5.4.160.0130.05319.23
5.4.150.0200.05318.86
5.4.140.0230.05016.33
5.4.130.0100.06716.43
5.4.120.0130.05016.36
5.4.110.0130.05316.22
5.4.100.0170.05016.34
5.4.90.0230.04316.32
5.4.80.0230.04316.40
5.4.70.0100.05716.46
5.4.60.0130.05316.39
5.4.50.0130.05016.29
5.4.40.0230.05016.21
5.4.30.0170.05016.32
5.4.20.0100.05716.56
5.4.10.0170.04716.20
5.4.00.0170.04715.67
5.3.290.0170.05014.54
5.3.280.0100.06014.48
5.3.270.0270.04314.70
5.3.260.0200.05014.45
5.3.250.0100.05714.46
5.3.240.0400.05714.70
5.3.230.0230.04314.58
5.3.220.0130.05314.44
5.3.210.0170.05314.52
5.3.200.0330.04714.36
5.3.190.0230.05014.41
5.3.180.0270.04014.55
5.3.170.0100.05714.58
5.3.160.0100.05714.58
5.3.150.0170.05014.58
5.3.140.0200.04314.57
5.3.130.0200.06014.56
5.3.120.0230.04314.56
5.3.110.0100.05714.49
5.3.100.0270.04013.89
5.3.90.0100.05313.90
5.3.80.0270.05314.11
5.3.70.0300.03313.86
5.3.60.0170.04713.80
5.3.50.0130.05313.80
5.3.40.0130.05313.93
5.3.30.0200.04313.77
5.3.20.0200.04713.52
5.3.10.0170.05013.47
5.3.00.0170.05013.59
5.2.170.0100.04311.22
5.2.160.0170.03711.23
5.2.150.0130.04011.09
5.2.140.0200.05311.09
5.2.130.0230.04710.96
5.2.120.0130.03710.94
5.2.110.0000.05311.26
5.2.100.0100.04011.09
5.2.90.0100.04310.99
5.2.80.0170.03711.08
5.2.70.0130.04010.93
5.2.60.0100.04310.89
5.2.50.0130.04310.86
5.2.40.0130.03710.82
5.2.30.0070.04310.81
5.2.20.0130.03711.11
5.2.10.0070.04010.71
5.2.00.0100.04010.68
5.1.60.0200.03010.15
5.1.50.0130.0309.92
5.1.40.0100.0339.98
5.1.30.0070.04010.41
5.1.20.0130.03710.32
5.1.10.0200.0339.99
5.1.00.0000.0439.94
5.0.50.0030.0338.64
5.0.40.0030.0308.46
5.0.30.0000.0508.20
5.0.20.0030.0308.09
5.0.10.0100.0238.39
5.0.00.0100.0378.31
4.4.90.0070.0236.65
4.4.80.0070.0236.65
4.4.70.0100.0276.65
4.4.60.0100.0236.65
4.4.50.0130.0276.65
4.4.40.0030.0376.65
4.4.30.0070.0206.65
4.4.20.0130.0136.65
4.4.10.0030.0236.65
4.4.00.0030.0376.65
4.3.110.0030.0236.65
4.3.100.0030.0236.65
4.3.90.0000.0236.65
4.3.80.0070.0336.65
4.3.70.0100.0176.65
4.3.60.0000.0236.65
4.3.50.0000.0276.65
4.3.40.0030.0336.65
4.3.30.0030.0206.65
4.3.20.0030.0206.65
4.3.10.0000.0236.65
4.3.00.0100.0237.24

preferences:
53.7 ms | 401 KiB | 5 Q