3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = NULL; if (is_null($x)) { echo "x is null\n"; } else { echo "x is not null\n"; } if (isset($x)) { echo "x is set\n"; } else { echo "x is not set\n"; } if (is_null($y)) { echo "y is null\n"; } else { echo "y is not null\n"; } if (isset($y)) { echo "y is set\n"; } else { echo "y is not set\n"; }

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)
8.3.60.0090.00618.56
8.3.50.0140.00317.90
8.3.40.0120.00318.79
8.3.30.0070.00718.44
8.3.20.0040.00419.18
8.3.10.0000.00821.95
8.3.00.0070.00020.51
8.2.180.0040.01116.88
8.2.170.0040.01122.96
8.2.160.0110.00322.20
8.2.150.0030.00524.18
8.2.140.0080.00024.66
8.2.130.0030.00619.89
8.2.120.0000.00826.35
8.2.110.0030.00619.45
8.2.100.0080.00418.09
8.2.90.0030.00517.73
8.2.80.0080.00019.07
8.2.70.0040.00417.80
8.2.60.0080.00018.21
8.2.50.0030.00518.10
8.2.40.0040.00419.52
8.2.30.0000.00719.11
8.2.20.0000.00718.01
8.2.10.0030.00518.01
8.2.00.0060.00317.53
8.1.280.0040.01425.92
8.1.270.0000.00820.68
8.1.260.0000.00726.35
8.1.250.0060.00328.09
8.1.240.0060.00320.31
8.1.230.0040.00719.00
8.1.220.0040.00417.74
8.1.210.0030.00618.77
8.1.200.0090.00017.35
8.1.190.0030.00617.23
8.1.180.0000.00818.10
8.1.170.0000.00918.50
8.1.160.0040.00418.82
8.1.150.0000.00818.84
8.1.140.0030.00522.15
8.1.130.0030.00320.18
8.1.120.0000.00817.40
8.1.110.0030.00317.43
8.1.100.0000.00817.29
8.1.90.0000.00817.29
8.1.80.0040.00417.32
8.1.70.0020.00517.31
8.1.60.0090.00317.48
8.1.50.0040.00417.50
8.1.40.0000.00817.40
8.1.30.0030.00517.49
8.1.20.0070.00017.58
8.1.10.0000.00717.56
8.1.00.0040.00417.42
8.0.300.0040.00418.77
8.0.290.0080.00016.61
8.0.280.0000.00718.48
8.0.270.0000.00817.36
8.0.260.0060.00018.46
8.0.250.0000.00716.99
8.0.240.0070.00017.00
8.0.230.0030.00316.95
8.0.220.0000.00716.86
8.0.210.0000.00816.92
8.0.200.0020.00516.96
8.0.190.0000.00816.95
8.0.180.0050.00316.85
8.0.170.0000.00816.89
8.0.160.0050.00316.86
8.0.150.0000.00716.85
8.0.140.0070.00016.75
8.0.130.0000.00513.36
8.0.120.0040.00416.79
8.0.110.0040.00416.85
8.0.100.0080.00016.77
8.0.90.0080.00016.86
8.0.80.0060.01016.85
8.0.70.0050.00316.75
8.0.60.0070.00016.73
8.0.50.0070.00016.80
8.0.30.0140.00916.87
8.0.20.0090.00917.40
8.0.10.0040.00417.02
8.0.00.0120.00916.81
7.4.330.0030.00315.55
7.4.320.0030.00316.46
7.4.300.0040.00416.54
7.4.290.0060.00016.45
7.4.280.0030.00616.55
7.4.270.0030.00316.36
7.4.260.0070.00316.33
7.4.250.0070.00016.41
7.4.240.0040.00416.44
7.4.230.0040.00416.43
7.4.220.0030.00616.55
7.4.210.0050.00816.56
7.4.200.0070.00016.63
7.4.160.0090.00816.49
7.4.140.0090.01017.86
7.4.130.0120.00616.47
7.4.120.0090.01016.51
7.4.110.0060.01216.49
7.4.100.0120.00916.38
7.4.90.0150.00316.60
7.4.80.0060.01219.39
7.4.70.0060.01616.54
7.4.60.0060.00916.57
7.4.50.0040.01116.57
7.4.40.0090.00616.57
7.3.330.0030.00313.03
7.3.320.0020.00213.08
7.3.310.0000.00816.26
7.3.300.0070.00016.22
7.3.290.0000.00716.18
7.3.280.0100.00716.21
7.3.260.0080.01116.25
7.3.240.0100.00616.20
7.3.230.0060.01016.53
7.3.210.0130.01016.29
7.3.200.0160.00016.52
7.3.190.0030.01516.40
7.3.180.0130.00616.26
7.3.170.0040.01816.25
7.3.160.0120.00816.43
7.2.330.0060.01116.57
7.2.320.0120.00916.45
7.2.310.0110.00716.57
7.2.300.0120.00316.44
7.2.290.0060.01116.61

preferences:
55.03 ms | 400 KiB | 5 Q