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"; } if (compact('x') != array()) { echo "x has been set\n"; } else { echo "x has not been set\n"; } if (compact('y') != array()) { echo "y has been set\n"; } else { echo "y has not been 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)
8.3.70.0100.01016.86
8.3.60.0090.00618.43
8.3.50.0070.00718.20
8.3.40.0070.00718.83
8.3.30.0140.00318.76
8.3.20.0000.00819.21
8.3.10.0000.00821.65
8.3.00.0070.00020.52
8.2.180.0000.01518.30
8.2.170.0120.00322.96
8.2.160.0070.00722.02
8.2.150.0060.00324.18
8.2.140.0030.00624.66
8.2.130.0030.00518.09
8.2.120.0040.00426.35
8.2.110.0060.00319.32
8.2.100.0070.00418.09
8.2.90.0030.00517.75
8.2.80.0030.00519.14
8.2.70.0030.00617.80
8.2.60.0000.00818.16
8.2.50.0000.00818.10
8.2.40.0000.00719.22
8.2.30.0000.00719.30
8.2.20.0040.00418.06
8.2.10.0000.00718.00
8.2.00.0040.00417.72
8.1.280.0040.01125.92
8.1.270.0050.00323.99
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0000.01020.44
8.1.230.0000.01118.99
8.1.220.0050.00317.74
8.1.210.0060.00318.77
8.1.200.0050.00517.34
8.1.190.0050.00317.23
8.1.180.0050.00318.10
8.1.170.0080.00018.56
8.1.160.0040.00418.94
8.1.150.0040.00418.95
8.1.140.0030.00322.10
8.1.130.0030.00320.27
8.1.120.0030.00317.41
8.1.110.0050.00317.36
8.1.100.0000.00817.42
8.1.90.0000.00717.46
8.1.80.0000.00817.48
8.1.70.0030.00317.34
8.1.60.0080.00417.47
8.1.50.0080.00017.54
8.1.40.0040.00417.51
8.1.30.0080.00017.59
8.1.20.0000.00717.66
8.1.10.0040.00417.49
8.1.00.0070.00017.34
8.0.300.0040.00418.77
8.0.290.0070.00016.75
8.0.280.0000.00818.32
8.0.270.0030.00317.32
8.0.260.0030.00318.36
8.0.250.0030.00316.99
8.0.240.0040.00416.91
8.0.230.0000.00716.92
8.0.220.0070.00016.94
8.0.210.0070.00017.00
8.0.200.0000.00816.95
8.0.190.0070.00016.91
8.0.180.0000.00717.02
8.0.170.0000.01016.87
8.0.160.0050.00217.03
8.0.150.0040.00416.87
8.0.140.0040.00416.80
8.0.130.0050.00013.37
8.0.120.0080.00016.87
8.0.110.0040.00416.90
8.0.100.0040.00417.02
8.0.90.0070.00016.79
8.0.80.0060.00916.96
8.0.70.0000.00716.82
8.0.60.0000.00717.00
8.0.50.0000.00716.89
8.0.30.0090.01117.11
8.0.20.0050.01417.40
8.0.10.0040.00416.95
8.0.00.0140.00616.64
7.4.330.0000.00515.55
7.4.320.0060.00016.51
7.4.300.0030.00316.56
7.4.290.0000.00616.62
7.4.280.0000.00916.53
7.4.270.0000.00816.50
7.4.260.0040.00416.58
7.4.250.0040.00416.45
7.4.240.0040.00416.41
7.4.230.0000.00716.50
7.4.220.0050.00316.35
7.4.210.0030.01116.52
7.4.200.0000.00816.48
7.4.160.0110.00716.57
7.4.140.0110.00817.86
7.4.130.0030.01516.62
7.4.120.0100.00816.54
7.4.110.0090.00916.45
7.4.100.0090.01216.51
7.4.90.0210.00416.46
7.4.80.0090.00919.39
7.4.70.0170.00016.56
7.4.60.0040.01116.44
7.4.50.0120.00316.64
7.4.40.0100.00716.55
7.3.330.0050.00013.12
7.3.320.0060.00012.98
7.3.310.0060.00316.47
7.3.300.0030.00316.11
7.3.290.0000.00716.11
7.3.280.0040.01316.27
7.3.260.0100.01216.26
7.3.240.0090.00916.25
7.3.230.0050.01116.53
7.3.210.0060.01016.42
7.3.200.0130.00316.44
7.3.190.0090.00916.42
7.3.180.0050.01116.38
7.3.170.0140.01016.29
7.3.160.0060.01016.48
7.2.330.0120.00616.51
7.2.320.0030.02016.66
7.2.310.0070.01116.64
7.2.300.0100.00716.38
7.2.290.0170.00016.62

preferences:
44.4 ms | 400 KiB | 5 Q