3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 100; $b = $a; $a = null; var_dump(is_set($a)); var_dump($b);

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)
8.3.40.0130.00618.76
8.3.30.0040.01118.73
8.3.20.0080.00020.21
8.3.10.0040.00423.65
8.3.00.0030.00519.38
8.2.170.0100.00322.96
8.2.160.0070.00720.35
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0050.00317.50
8.2.120.0000.00826.35
8.2.110.0030.00620.51
8.2.100.0040.00817.85
8.2.90.0000.00818.22
8.2.80.0040.00417.97
8.2.70.0060.00317.61
8.2.60.0040.00417.93
8.2.50.0000.00818.07
8.2.40.0040.00419.21
8.2.30.0030.00520.54
8.2.20.0050.00317.71
8.2.10.0050.00217.95
8.2.00.0070.00018.02
8.1.270.0090.00323.88
8.1.260.0080.00028.09
8.1.250.0070.00028.09
8.1.240.0090.00022.14
8.1.230.0090.00320.95
8.1.220.0000.00817.74
8.1.210.0030.00518.77
8.1.200.0000.00917.22
8.1.190.0050.00317.22
8.1.180.0030.00518.10
8.1.170.0000.00718.40
8.1.160.0000.00721.98
8.1.150.0020.00518.73
8.1.140.0050.00319.39
8.1.130.0000.00717.67
8.1.120.0040.00417.38
8.1.110.0030.00517.43
8.1.100.0050.00217.36
8.1.90.0040.00417.38
8.1.80.0000.00717.26
8.1.70.0030.00317.27
8.1.60.0030.00617.49
8.1.50.0040.00417.38
8.1.40.0000.00917.33
8.1.30.0000.00817.63
8.1.20.0040.00417.47
8.1.10.0000.00717.43
8.1.00.0050.00217.52
8.0.300.0000.00720.09
8.0.290.0050.00216.63
8.0.280.0070.00018.28
8.0.270.0000.00817.22
8.0.260.0030.00317.18
8.0.250.0030.00316.99
8.0.240.0000.00816.96
8.0.230.0000.00716.84
8.0.220.0040.00416.79
8.0.210.0000.00816.90
8.0.200.0060.00016.93
8.0.190.0000.00716.93
8.0.180.0000.00716.91
8.0.170.0030.00516.81
8.0.160.0000.00716.95
8.0.150.0020.00516.84
8.0.140.0030.00316.84
8.0.130.0000.00713.26
8.0.120.0050.00316.72
8.0.110.0000.00716.87
8.0.100.0000.00716.99
8.0.90.0040.00416.94
8.0.80.0070.00716.91
8.0.70.0040.00416.90
8.0.60.0070.00016.76
8.0.50.0040.00416.92
8.0.30.0090.00817.19
8.0.20.0110.01117.40
8.0.10.0000.00716.82
8.0.00.0090.00816.74
7.4.330.0020.00216.70
7.4.320.0030.00316.42
7.4.300.0060.00016.61
7.4.290.0000.00716.50
7.4.280.0040.00416.57
7.4.270.0000.00716.46
7.4.260.0030.00316.46
7.4.250.0040.00416.56
7.4.240.0030.00516.47
7.4.230.0030.00316.48
7.4.220.0090.00916.49
7.4.210.0150.00816.57
7.4.200.0030.00316.32
7.4.160.0120.00316.45
7.4.150.0080.01217.40
7.4.140.0180.00717.86
7.4.130.0120.01216.52
7.4.120.0100.00716.39
7.4.110.0060.01116.27
7.4.100.0080.00816.51
7.4.90.0140.00316.60
7.4.80.0080.00819.39
7.4.70.0100.01216.49
7.4.60.0070.01016.46
7.4.50.0100.00316.41
7.4.40.0100.00716.42
7.4.30.0120.00916.36
7.4.00.0100.00014.79
7.3.330.0060.00013.16
7.3.320.0000.00712.94
7.3.310.0000.01016.28
7.3.300.0030.00316.39
7.3.290.0070.00816.32
7.3.280.0100.00716.36
7.3.270.0140.00417.40
7.3.260.0100.00716.50
7.3.250.0100.00716.37
7.3.240.0030.01416.37
7.3.230.0140.00916.39
7.3.210.0100.01016.43
7.3.200.0100.01416.38
7.3.190.0030.01316.49
7.3.180.0110.00516.21
7.3.170.0000.01516.66
7.3.160.0130.00316.53
7.2.330.0140.00316.41
7.2.320.0140.00416.63
7.2.310.0090.00916.24
7.2.300.0040.01216.54
7.2.290.0070.01016.49
7.2.60.0130.00016.80
7.2.00.0140.00419.31
7.1.200.0020.00515.48
7.1.100.0100.00717.94
7.1.70.0050.01117.14
7.1.60.0100.01019.36
7.1.50.0110.00817.00
7.1.00.0070.07322.45
7.0.200.0030.00616.70
7.0.100.0070.08019.91
7.0.90.0000.06720.02
7.0.80.0030.07319.95
7.0.70.0100.07319.95
7.0.60.0100.07719.95
7.0.50.0100.08320.27
7.0.40.0030.05719.95
7.0.30.0130.08320.19
7.0.20.0000.08020.02
7.0.10.0100.05720.06
7.0.00.0100.04320.10
5.6.250.0070.08020.77
5.6.240.0100.07320.63
5.6.230.0030.08020.63
5.6.220.0170.04020.73
5.6.210.0030.08720.44
5.6.200.0270.06321.17
5.6.190.0100.08021.08
5.6.180.0100.06721.03
5.6.170.0070.07721.05
5.6.160.0070.04021.04
5.6.150.0000.04721.04
5.6.140.0070.04021.04
5.6.130.0030.04321.16
5.6.120.0070.04021.00
5.6.110.0030.04321.09
5.6.100.0070.03721.09
5.6.90.0100.03721.08
5.6.80.0000.04020.40
5.6.70.0070.07320.48
5.6.60.0100.03320.37
5.6.50.0100.03720.34
5.6.40.0030.04020.31
5.6.30.0030.04020.30
5.6.20.0100.03720.43
5.6.10.0030.04020.46
5.6.00.0070.03320.47
5.5.380.0170.05020.40
5.5.370.0170.07320.54
5.5.360.0100.06020.43
5.5.350.0030.08720.43
5.5.340.0100.08020.91
5.5.330.0130.07320.92
5.5.320.0100.07320.73
5.5.310.0070.06020.93
5.5.300.0000.04720.88
5.5.290.0170.03020.89
5.5.280.0070.04020.85
5.5.270.0030.04320.88
5.5.260.0100.03320.79
5.5.250.0100.04020.69
5.5.240.0000.04720.15
5.5.230.0030.04020.18
5.5.220.0070.06720.29
5.5.210.0030.05320.30
5.5.200.0070.03720.24
5.5.190.0000.05719.99
5.5.180.0070.06720.21
5.5.160.0030.04020.25
5.5.150.0070.04020.12
5.5.140.0130.04020.22
5.5.130.0030.04020.24
5.5.120.0070.03720.21
5.5.110.0070.03720.21
5.5.100.0030.04020.11
5.5.90.0070.03720.09
5.5.80.0000.04720.09
5.5.70.0130.02720.15
5.5.60.0070.05320.09
5.5.50.0000.04020.13
5.5.40.0000.04020.07
5.5.30.0070.03020.07
5.5.20.0030.05719.93
5.5.10.0030.07020.03
5.5.00.0070.05020.10

preferences:
62.71 ms | 400 KiB | 5 Q