3v4l.org

run code in 300+ PHP versions simultaneously
<?php $test = ['kai' => null]; var_dump(isset($test['kai']));

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)
8.3.60.0120.00616.49
8.3.50.0090.00921.92
8.3.40.0120.00918.47
8.3.30.0070.00718.59
8.3.20.0000.00721.78
8.3.10.0000.00723.71
8.3.00.0040.00419.79
8.2.180.0150.00616.63
8.2.170.0070.00722.96
8.2.160.0070.00720.16
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0080.00022.25
8.2.120.0070.00026.35
8.2.110.0030.00922.07
8.2.100.0090.00317.72
8.2.90.0040.00418.28
8.2.80.0080.00017.97
8.2.70.0030.00617.50
8.2.60.0080.00017.80
8.2.50.0050.00318.10
8.2.40.0040.00422.17
8.2.30.0000.00719.24
8.2.20.0080.00017.60
8.2.10.0040.00418.05
8.2.00.0080.00018.02
8.1.280.0070.01425.92
8.1.270.0030.00523.92
8.1.260.0050.00328.09
8.1.250.0030.00528.09
8.1.240.0000.00824.03
8.1.230.0090.00320.85
8.1.220.0000.00717.74
8.1.210.0090.00318.77
8.1.200.0080.00017.35
8.1.190.0040.00417.10
8.1.180.0030.00618.10
8.1.170.0090.00018.66
8.1.160.0000.00722.12
8.1.150.0050.00220.98
8.1.140.0000.00919.50
8.1.130.0030.00317.54
8.1.120.0000.00717.44
8.1.110.0040.00417.40
8.1.100.0030.00417.28
8.1.90.0030.00517.40
8.1.80.0050.00217.27
8.1.70.0040.00417.38
8.1.60.0040.00417.50
8.1.50.0030.00617.36
8.1.40.0000.00717.34
8.1.30.0060.00317.57
8.1.20.0000.00817.62
8.1.10.0050.00217.50
8.1.00.0040.00417.47
8.0.300.0070.00020.09
8.0.290.0050.00216.63
8.0.280.0000.00718.31
8.0.270.0070.00017.19
8.0.260.0000.00617.18
8.0.250.0000.00716.76
8.0.240.0040.00416.87
8.0.230.0040.00416.86
8.0.220.0000.00716.81
8.0.210.0030.00316.79
8.0.200.0000.00616.90
8.0.190.0070.00016.90
8.0.180.0050.00216.75
8.0.170.0050.00316.82
8.0.160.0000.00716.82
8.0.150.0000.00716.65
8.0.140.0030.00316.68
8.0.130.0030.00313.25
8.0.120.0000.00816.74
8.0.110.0070.00016.79
8.0.100.0040.00416.71
8.0.90.0000.00716.89
8.0.80.0040.01216.88
8.0.70.0050.00316.88
8.0.60.0060.00316.72
8.0.50.0000.00716.76
8.0.30.0080.01117.03
8.0.20.0100.01217.40
8.0.10.0000.00716.98
8.0.00.0130.00316.66
7.4.330.0050.00015.08
7.4.320.0060.00016.52
7.4.300.0060.00016.39
7.4.290.0080.00016.57
7.4.280.0020.00616.42
7.4.270.0030.00316.35
7.4.260.0030.00316.43
7.4.250.0040.00416.49
7.4.240.0070.00016.38
7.4.230.0000.00716.34
7.4.220.0180.00316.36
7.4.210.0070.00716.39
7.4.200.0000.00716.33
7.4.160.0090.00716.26
7.4.150.0160.00517.40
7.4.140.0190.01517.86
7.4.130.0090.00816.22
7.4.120.0140.00516.33
7.4.110.0150.00416.35
7.4.100.0120.00416.48
7.4.90.0090.00916.27
7.4.80.0100.00719.39
7.4.70.0190.00016.51
7.4.60.0060.00916.40
7.4.50.0000.01816.26
7.4.40.0030.01316.30
7.4.30.0100.00616.32
7.4.00.0030.01515.05
7.3.330.0030.00313.21
7.3.320.0030.00312.94
7.3.310.0030.00316.27
7.3.300.0030.00316.14
7.3.290.0080.00816.17
7.3.280.0060.01416.21
7.3.270.0070.01017.40
7.3.260.0110.00916.27
7.3.250.0080.01116.36
7.3.240.0080.00816.13
7.3.230.0090.01016.39
7.3.210.0060.01116.34
7.3.200.0060.00916.48
7.3.190.0030.01316.15
7.3.180.0100.01016.42
7.3.170.0070.01116.49
7.3.160.0080.00816.23
7.2.330.0090.00916.65
7.2.320.0040.01916.34
7.2.310.0100.00716.55
7.2.300.0060.01216.55
7.2.290.0050.01116.59
7.2.60.0080.00816.45
7.2.00.0060.00918.95
7.1.200.0030.00615.27
7.1.70.0050.00217.04
7.1.60.0060.00919.75
7.1.00.0030.07722.57
7.0.200.0290.00414.85
7.0.90.7200.00019.89
7.0.80.0830.00019.95
7.0.70.0930.00021.80
7.0.60.0870.00021.80
7.0.50.0970.00020.33
7.0.40.0970.00020.34
7.0.30.0770.00020.39
7.0.20.7670.00020.27
7.0.10.8770.00020.41
7.0.00.4070.00020.27
5.6.240.0700.00020.73
5.6.230.0770.00020.75
5.6.220.0900.00020.57
5.6.210.0930.00020.86
5.6.200.0730.00021.07
5.6.190.0900.00021.08
5.6.180.0730.00021.17
5.6.170.0770.00021.06
5.6.160.0700.00021.12
5.6.150.0870.00021.08
5.6.140.0900.00021.07
5.6.130.0870.00021.07
5.6.120.0870.00021.07
5.6.110.1130.00021.07
5.6.100.0730.00021.06
5.6.90.0870.00021.08
5.6.80.0870.00020.48
5.6.70.1030.00020.45
5.6.60.0800.00020.46
5.6.50.0700.00020.46
5.6.40.0700.00020.36
5.6.30.0900.00020.43
5.6.20.0870.00020.40
5.6.10.0700.00020.52
5.6.00.0870.00020.32

preferences:
51.74 ms | 401 KiB | 5 Q