3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = array('key' => null); var_dump(isset($data['key'])); // unsafe var_dump(array_key_exists('key', $data)); // better, but still unsafe var_dump(array_key_exists('key', $data) && $data['key']); // safe

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)
8.3.60.0110.00418.30
8.3.50.0230.00722.99
8.3.40.0110.01118.73
8.3.30.0100.00719.17
8.3.20.0080.00020.31
8.3.10.0080.00021.89
8.3.00.0040.00417.93
8.2.180.0060.00916.38
8.2.170.0070.00722.96
8.2.160.0100.00320.53
8.2.150.0000.00824.18
8.2.140.0090.00924.66
8.2.130.0070.01126.16
8.2.120.0110.00320.95
8.2.110.0060.00319.29
8.2.100.0090.00317.78
8.2.90.0050.00319.34
8.2.80.0000.00719.25
8.2.70.0030.00617.75
8.2.60.0080.00017.93
8.2.50.0030.00718.10
8.2.40.0050.00320.55
8.2.30.0040.00418.13
8.2.20.0080.00017.66
8.2.10.0020.00517.96
8.2.00.0020.00517.68
8.1.280.0030.01225.92
8.1.270.0050.00323.92
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0090.00022.40
8.1.230.0040.00817.85
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0060.00317.23
8.1.190.0050.00317.23
8.1.180.0000.00818.10
8.1.170.0080.00020.74
8.1.160.0040.00418.80
8.1.150.0040.00418.82
8.1.140.0040.00417.45
8.1.130.0040.00417.78
8.1.120.0000.00717.48
8.1.110.0000.00717.35
8.1.100.0000.00717.49
8.1.90.0080.00317.49
8.1.80.0050.00317.38
8.1.70.0030.00317.34
8.1.60.0080.00017.60
8.1.50.0000.00917.50
8.1.40.0050.00317.47
8.1.30.0040.00417.68
8.1.20.0040.00417.69
8.1.10.0040.00417.49
8.1.00.0050.00317.48
8.0.300.0040.00418.77
8.0.290.0030.00616.62
8.0.280.0030.00318.36
8.0.270.0040.00417.17
8.0.260.0030.00317.25
8.0.250.0070.00016.86
8.0.240.0030.00616.93
8.0.230.0030.00516.96
8.0.220.0070.00016.84
8.0.210.0050.00216.80
8.0.200.0030.00316.84
8.0.190.0030.00316.86
8.0.180.0040.00416.92
8.0.170.0080.00016.85
8.0.160.0030.00517.02
8.0.150.0050.00316.79
8.0.140.0070.00316.82
8.0.130.0050.00013.37
8.0.120.0040.00416.86
8.0.110.0000.00716.86
8.0.100.0040.00416.86
8.0.90.0050.00216.77
8.0.80.0030.01316.90
8.0.70.0000.00816.89
8.0.60.0000.00816.78
8.0.50.0040.00416.87
8.0.30.0130.00717.09
8.0.20.0110.01117.40
8.0.10.0040.00416.86
8.0.00.0100.01016.76
7.4.330.0030.00315.02
7.4.320.0040.00416.45
7.4.300.0000.00716.64
7.4.290.0000.00816.49
7.4.280.0000.00716.60
7.4.270.0030.00316.53
7.4.260.0000.00716.41
7.4.250.0000.00816.47
7.4.240.0040.00416.61
7.4.230.0000.00716.62
7.4.220.0170.00716.66
7.4.210.0060.01016.40
7.4.200.0020.00516.66
7.4.160.0090.00616.55
7.4.150.0110.01117.40
7.4.140.0080.00917.86
7.4.130.0100.00816.56
7.4.120.0140.00316.54
7.4.110.0110.00716.32
7.4.100.0030.01616.34
7.4.90.0090.00816.50
7.4.80.0080.01319.39
7.4.70.0060.00916.40
7.4.60.0050.01416.34
7.4.50.0000.00816.37
7.4.40.0060.00916.52
7.4.30.0200.00016.51
7.4.00.0070.01114.81
7.3.330.0030.00312.94
7.3.320.0050.00013.00
7.3.310.0000.00716.27
7.3.300.0080.00016.29
7.3.290.0070.00716.30
7.3.280.0060.01316.32
7.3.270.0130.01317.40
7.3.260.0110.00716.45
7.3.250.0100.01016.42
7.3.240.0180.00616.37
7.3.230.0060.00916.39
7.3.210.0090.00816.39
7.3.200.0120.01219.39
7.3.190.0130.00716.55
7.3.180.0090.00616.57
7.3.170.0090.00916.54
7.3.160.0120.00916.25
7.3.120.0070.01014.68
7.2.330.0100.01316.29
7.2.320.0000.01616.33
7.2.310.0060.01616.42
7.2.300.0060.01216.45
7.2.290.0080.00816.68
7.2.60.0070.00716.83
7.2.00.0060.00919.45
7.1.200.0100.00315.80
7.1.100.0270.01117.89
7.1.70.0080.00417.13
7.1.60.0030.02019.40
7.1.50.0170.02034.49
7.1.00.0100.07022.28
7.0.200.0040.00416.77
7.0.140.0100.06022.10
7.0.60.0030.08720.01
7.0.50.0030.08317.78
7.0.40.0070.07720.06
7.0.30.0270.05320.16
7.0.20.0170.04020.16
7.0.10.0000.04720.20
7.0.00.0070.08320.13
5.6.280.0000.07721.03
5.6.210.0070.04320.55
5.6.200.0070.08018.09
5.6.190.0030.05320.77
5.6.180.0270.04720.61
5.6.170.0200.03720.31
5.6.160.0030.09320.71
5.6.150.0100.05018.20
5.6.140.0070.06318.16
5.6.130.0100.07718.14
5.6.120.0100.08021.01
5.6.110.0100.06721.13
5.6.100.0070.08020.97
5.6.90.0130.07020.97
5.6.80.0070.07720.48
5.5.350.0070.07720.34
5.5.340.0130.07018.02
5.5.330.0070.04020.40
5.5.320.0230.05320.28
5.5.310.0230.05320.20
5.5.300.0030.08317.96
5.5.290.0070.05017.91
5.5.280.0000.04720.77
5.5.270.0000.04720.91
5.5.260.0030.08020.76
5.5.250.0070.08020.57
5.5.240.0070.07720.05
5.4.450.0200.05319.13
5.4.440.0530.04319.54
5.4.430.0470.04719.20
5.4.420.0230.04319.56
5.4.410.0370.04019.43
5.4.400.0500.03319.09
5.4.390.0200.04719.14
5.4.380.0230.04718.63
5.4.370.0130.05318.58
5.4.360.0200.04718.46
5.4.350.0230.04318.71
5.4.340.0170.06318.46
5.4.320.0040.03812.45
5.4.310.0090.03412.45
5.4.300.0060.03612.45
5.4.290.0090.03512.45
5.4.280.0040.03812.35
5.4.270.0040.04512.34
5.4.260.0030.04012.34
5.4.250.0070.03512.34
5.4.240.0080.03312.34
5.4.230.0070.03512.34
5.4.220.0050.04212.34
5.4.210.0100.03912.34
5.4.200.0070.04312.34
5.4.190.0070.04712.33
5.4.180.0060.03612.33
5.4.170.0050.03712.34
5.4.160.0080.03312.34
5.4.150.0060.03812.34
5.4.140.0080.03612.02
5.4.130.0070.03412.01
5.4.120.0050.03611.97
5.4.110.0040.03711.96
5.4.100.0080.03411.96
5.4.90.0030.03911.96
5.4.80.0050.03811.96
5.4.70.0040.03611.96
5.4.60.0050.03511.96
5.4.50.0030.03811.96
5.4.40.0060.03411.95
5.4.30.0070.03911.95
5.4.20.0070.03411.95
5.4.10.0050.03511.95
5.4.00.0070.03611.43
5.3.290.0100.03512.80
5.3.280.0060.03912.71
5.3.270.0070.04312.73
5.3.260.0100.03512.72
5.3.250.0060.03712.72
5.3.240.0060.04112.72
5.3.230.0070.04212.71
5.3.220.0090.04612.68
5.3.210.0100.03612.68
5.3.200.0040.04912.68
5.3.190.0060.04612.68
5.3.180.0100.03712.68
5.3.170.0050.03912.66
5.3.160.0080.03912.67
5.3.150.0040.04012.67
5.3.140.0080.03712.66
5.3.130.0020.04312.66
5.3.120.0070.04912.66
5.3.110.0060.05112.65
5.3.100.0050.03912.12
5.3.90.0050.03812.08
5.3.80.0060.03712.08
5.3.70.0080.03712.07
5.3.60.0110.04512.06
5.3.50.0110.04412.00
5.3.40.0070.04512.00
5.3.30.0060.04111.94
5.3.20.0050.03611.72
5.3.10.0100.04311.69
5.3.00.0040.03711.68
5.2.170.0040.0319.18
5.2.160.0040.0309.18
5.2.150.0070.0299.18
5.2.140.0090.0289.18
5.2.130.0050.0309.14
5.2.120.0050.0289.14
5.2.110.0060.0289.14
5.2.100.0070.0299.14
5.2.90.0030.0309.14
5.2.80.0050.0309.14
5.2.70.0050.0299.14
5.2.60.0020.0329.09
5.2.50.0030.0319.05
5.2.40.0080.0259.03
5.2.30.0070.0289.00
5.2.20.0080.0288.99
5.2.10.0050.0398.91
5.2.00.0070.0308.78
5.1.60.0080.0208.06
5.1.50.0050.0238.06
5.1.40.0070.0288.04
5.1.30.0040.0268.39
5.1.20.0070.0248.41
5.1.10.0050.0258.13
5.1.00.0070.0238.14
5.0.50.0050.0196.62
5.0.40.0030.0206.47
5.0.30.0050.0296.29
5.0.20.0000.0236.25
5.0.10.0040.0196.24
5.0.00.0030.0316.23
4.4.90.0010.0174.78
4.4.80.0020.0164.75
4.4.70.0030.0154.75
4.4.60.0000.0174.75
4.4.50.0020.0164.77
4.4.40.0000.0314.71
4.4.30.0020.0164.76
4.4.20.0010.0204.85
4.4.10.0040.0144.85
4.4.00.0020.0254.76
4.3.110.0030.0154.67
4.3.100.0030.0144.67
4.3.90.0030.0144.63
4.3.80.0010.0264.58
4.3.70.0050.0124.63
4.3.60.0040.0134.63
4.3.50.0020.0164.63
4.3.40.0020.0254.54
4.3.30.0020.0193.29
4.3.20.0010.0173.26
4.3.10.0010.0163.22
4.3.00.0200.03315.38

preferences:
44.07 ms | 401 KiB | 5 Q