3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public $b; } $a = new A; $a->b = new A; $a->b->b = null; if (isset($a->b->b)) { echo 'exists'; }

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)
8.3.60.0100.01018.30
8.3.50.0090.00918.34
8.3.40.0100.00618.84
8.3.30.0070.00718.71
8.3.20.0040.00419.34
8.3.10.0040.00423.60
8.3.00.0040.00420.64
8.2.180.0140.00718.33
8.2.170.0150.00022.96
8.2.160.0030.01022.25
8.2.150.0030.00624.18
8.2.140.0030.00524.66
8.2.130.0150.00419.70
8.2.120.0040.01126.35
8.2.110.0070.01419.45
8.2.100.0000.01217.84
8.2.90.0000.00817.50
8.2.80.0040.00417.97
8.2.70.0050.00317.92
8.2.60.0000.00918.03
8.2.50.0060.00318.10
8.2.40.0040.00419.23
8.2.30.0000.00819.06
8.2.20.0000.00818.06
8.2.10.0050.00218.00
8.2.00.0030.00517.65
8.1.280.0040.01825.92
8.1.270.0040.00420.48
8.1.260.0000.00826.35
8.1.250.0040.00428.09
8.1.240.0060.00323.82
8.1.230.0070.00322.11
8.1.220.0030.00517.74
8.1.210.0000.00818.77
8.1.200.0000.00817.24
8.1.190.0030.00617.25
8.1.180.0070.00018.10
8.1.170.0030.00518.59
8.1.160.0000.00718.77
8.1.150.0070.00018.88
8.1.140.0030.00322.04
8.1.130.0000.00820.14
8.1.120.0000.00817.36
8.1.110.0000.00817.47
8.1.100.0000.00817.39
8.1.90.0050.00317.41
8.1.80.0050.00217.36
8.1.70.0030.00517.40
8.1.60.0030.00517.43
8.1.50.0060.00317.46
8.1.40.0040.00417.45
8.1.30.0000.00917.50
8.1.20.0040.00417.62
8.1.10.0040.00417.55
8.1.00.0070.00017.48
8.0.300.0000.00718.77
8.0.290.0000.00816.63
8.0.280.0070.00018.38
8.0.270.0070.00017.20
8.0.260.0030.00318.26
8.0.250.0030.00316.95
8.0.240.0030.00316.77
8.0.230.0040.00416.77
8.0.220.0000.00716.84
8.0.210.0000.00716.88
8.0.200.0070.00016.88
8.0.190.0030.00316.89
8.0.180.0050.00316.90
8.0.170.0000.00916.81
8.0.160.0060.00316.81
8.0.150.0030.00316.73
8.0.140.0050.00216.81
8.0.130.0000.00513.26
8.0.120.0030.00516.76
8.0.110.0030.00316.87
8.0.100.0040.00416.77
8.0.90.0040.00416.84
8.0.80.0080.01116.79
8.0.70.0040.00416.77
8.0.60.0020.00516.80
8.0.50.0040.00416.80
8.0.30.0110.00816.96
8.0.20.0120.00617.40
8.0.10.0000.00716.96
8.0.00.0110.00816.76
7.4.330.0020.00215.55
7.4.320.0060.00016.57
7.4.300.0030.00316.50
7.4.290.0040.00416.50
7.4.280.0000.00716.52
7.4.270.0000.00716.65
7.4.260.0030.00316.51
7.4.250.0030.00316.54
7.4.240.0040.00316.60
7.4.230.0030.00316.67
7.4.220.0050.00216.71
7.4.210.0090.00816.57
7.4.200.0030.00316.35
7.4.160.0060.01016.49
7.4.140.0110.00617.86
7.4.130.0100.00716.50
7.4.120.0110.00716.50
7.4.110.0060.01216.70
7.4.100.0100.00716.64
7.4.90.0090.00916.55
7.4.80.0070.01019.39
7.4.70.0090.00916.49
7.4.60.0080.00816.28
7.4.50.0070.01016.45
7.4.40.0060.01616.54
7.3.330.0030.00313.20
7.3.320.0050.00013.24
7.3.310.0060.00316.23
7.3.300.0000.00716.21
7.3.290.0030.00316.09
7.3.280.0070.01016.22
7.3.260.0080.01116.42
7.3.240.0080.01016.37
7.3.230.0060.01316.32
7.3.210.0120.00916.32
7.3.200.0110.00516.50
7.3.190.0070.01016.62
7.3.180.0060.00916.24
7.3.170.0130.01016.26
7.3.160.0030.01316.50
7.2.330.0070.01016.61
7.2.320.0100.01016.76
7.2.310.0070.01016.68
7.2.300.0040.01416.70
7.2.290.0090.00916.75

preferences:
51.95 ms | 401 KiB | 5 Q