3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [ 'foo' => null ]; var_dump(isset($a['foo'])); var_dump(array_key_exists('foo', $a)); $b = new stdClass; $b->foo = null; var_dump(isset($b->foo));

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)
8.3.40.0120.00618.93
8.3.30.0000.01818.90
8.3.20.0050.00220.40
8.3.10.0080.00023.66
8.3.00.0030.00519.38
8.2.170.0070.01122.96
8.2.160.0100.00620.52
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0050.00517.63
8.2.120.0080.00026.35
8.2.110.0090.00020.52
8.2.100.0000.01217.93
8.2.90.0040.00419.22
8.2.80.0040.00417.97
8.2.70.0040.00417.50
8.2.60.0040.00417.93
8.2.50.0040.00418.07
8.2.40.0050.00219.32
8.2.30.0050.00320.53
8.2.20.0040.00417.77
8.2.10.0080.00017.93
8.2.00.0040.00418.06
8.1.270.0040.00422.00
8.1.260.0030.00528.09
8.1.250.0090.00028.09
8.1.240.0060.00323.88
8.1.230.0040.00817.66
8.1.220.0000.00817.74
8.1.210.0060.00618.77
8.1.200.0030.00617.23
8.1.190.0090.00017.10
8.1.180.0040.00418.10
8.1.170.0050.00318.83
8.1.160.0050.00221.86
8.1.150.0040.00418.73
8.1.140.0060.00319.43
8.1.130.0040.00417.71
8.1.120.0030.00417.38
8.1.110.0020.00517.45
8.1.100.0030.00717.40
8.1.90.0000.00717.47
8.1.80.0050.00317.37
8.1.70.0000.00717.23
8.1.60.0000.00817.54
8.1.50.0040.00417.36
8.1.40.0040.00417.37
8.1.30.0050.00317.46
8.1.20.0030.00617.44
8.1.10.0040.00417.60
8.1.00.0040.00417.35
8.0.300.0070.00018.77
8.0.290.0000.00716.63
8.0.280.0000.00618.32
8.0.270.0070.00017.13
8.0.260.0000.00617.09
8.0.250.0000.00716.86
8.0.240.0000.00716.88
8.0.230.0040.00416.84
8.0.220.0000.00716.71
8.0.210.0000.00716.76
8.0.200.0030.00316.77
8.0.190.0040.00416.95
8.0.180.0040.00416.74
8.0.170.0030.00516.77
8.0.160.0000.00816.83
8.0.150.0040.00316.66
8.0.140.0070.00016.79
8.0.130.0050.00013.29
8.0.120.0000.00716.78
8.0.110.0030.00516.85
8.0.100.0000.00716.66
8.0.90.0030.00316.79
8.0.80.0070.00716.78
8.0.70.0070.00016.71
8.0.60.0080.00016.74
8.0.50.0000.00716.68
8.0.30.0110.00816.91
8.0.20.0080.01117.40
8.0.10.0070.00016.95
8.0.00.0090.00816.62
7.4.330.0020.00216.83
7.4.320.0000.00616.36
7.4.300.0000.00616.42
7.4.290.0030.00316.49
7.4.280.0050.00216.58
7.4.270.0030.00316.61
7.4.260.0030.00316.55
7.4.250.0080.00016.46
7.4.240.0030.00416.52
7.4.230.0030.00316.30
7.4.220.0070.01416.45
7.4.210.0070.01016.50
7.4.200.0030.00316.63
7.4.160.0100.00716.39
7.4.150.0110.00917.40
7.4.140.0110.00917.86
7.4.130.0130.00416.56
7.4.120.0120.00916.65
7.4.110.0110.00716.47
7.4.100.0120.01216.44
7.4.90.0090.00916.60
7.4.80.0100.00619.39
7.4.70.0050.01116.51
7.4.60.0100.00616.61
7.4.50.0120.00616.41
7.4.40.0070.01016.48
7.4.30.0130.01016.61
7.4.00.0040.01414.99
7.3.330.0030.00313.18
7.3.320.0000.00613.14
7.3.310.0040.00416.27
7.3.300.0030.00316.25
7.3.290.0000.00616.17
7.3.280.0070.01016.25
7.3.270.0130.01017.40
7.3.260.0130.00316.36
7.3.250.0100.00716.37
7.3.240.0110.00816.46
7.3.230.0110.00716.39
7.3.210.0070.01016.42
7.3.200.0120.00316.29
7.3.190.0090.00916.41
7.3.180.0070.01016.53
7.3.170.0040.01416.59
7.3.160.0110.00416.46
7.3.120.0070.01014.72
7.3.110.0060.00614.89
7.3.100.0050.00314.71
7.3.90.0090.00614.88
7.3.80.0050.00515.15
7.3.70.0030.01014.69
7.3.60.0080.00814.71
7.3.50.0070.00714.80
7.3.40.0060.00314.80
7.3.30.0030.01414.71
7.3.20.0000.01516.70
7.3.10.0090.00616.60
7.3.00.0080.00816.74
7.2.330.0100.00716.43
7.2.320.0070.01816.73
7.2.310.0150.00616.66
7.2.300.0100.00716.65
7.2.290.0070.01416.66
7.2.240.0090.00615.07
7.2.230.0070.01015.21
7.2.220.0070.00714.95
7.2.210.0080.00814.81
7.2.200.0110.00014.85
7.2.190.0000.00914.70
7.2.180.0110.00714.81
7.2.170.0100.00315.16
7.2.160.0040.00814.95
7.2.150.0000.01616.79
7.2.140.0060.00616.72
7.2.130.0090.00617.07
7.2.120.0030.01017.01
7.2.110.0030.01016.94
7.2.100.0040.00716.81
7.2.90.0070.01116.67
7.2.80.0100.00516.88
7.2.70.0030.00917.01
7.2.60.0060.00917.00
7.2.50.0090.00316.89
7.2.40.0040.01416.85
7.2.30.0030.01316.89
7.2.20.0030.01016.95
7.2.10.0100.00716.95
7.2.00.0020.01318.21
7.1.330.0070.00715.54
7.1.320.0030.01315.89
7.1.310.0100.00315.91
7.1.300.0070.01015.71
7.1.290.0100.00315.38
7.1.280.0070.00715.71
7.1.270.0100.00715.52
7.1.260.0080.00715.63
7.1.250.0110.00315.73
7.1.200.0080.00615.59
7.1.100.0040.01118.18
7.1.70.0000.01416.96
7.1.60.0040.01919.36
7.1.50.0070.01416.93
7.1.00.0100.07022.31
7.0.200.0060.00616.69
7.0.60.0070.07720.08
7.0.50.0100.05717.89
7.0.40.0130.05719.90
7.0.30.0300.04720.04
7.0.20.0300.04320.16
7.0.10.0130.08020.32
7.0.00.0030.07020.08
5.6.280.0030.06021.11
5.6.210.0070.08020.76
5.6.200.0170.07718.19
5.6.190.0130.07720.77
5.6.180.0330.07020.30
5.6.170.0230.08020.48
5.6.160.0070.08320.48
5.6.150.0000.04318.11
5.6.140.0170.06718.10
5.6.130.0030.04318.22
5.6.120.0100.05020.96
5.6.110.0030.04321.04
5.6.100.0130.07720.95
5.6.90.0100.07320.86
5.6.80.0130.06720.28
5.5.350.0200.07320.41
5.5.340.0030.04017.98
5.5.330.0000.07020.15
5.5.320.0030.07320.29
5.5.310.0170.04720.34
5.5.300.0030.04317.91
5.5.290.0000.06017.98
5.5.280.0070.04720.76
5.5.270.0030.06020.76
5.5.260.0000.04320.97
5.5.250.0070.04020.58
5.5.240.3830.03020.14

preferences:
42.94 ms | 400 KiB | 5 Q