3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(~E_NOTICE); echo (int) isset( $a ); // false and w/o error msg echo (int) empty( $a ); // true (false and 0 empty, too echo (int) is_null( $a ); // true and error msg echo (int) (null === $a); // true and error msg

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)
8.3.60.0170.00316.88
8.3.50.0100.00717.94
8.3.40.0110.00418.54
8.3.30.0140.00018.81
8.3.20.0030.00320.12
8.3.10.0050.00323.69
8.3.00.0000.00820.99
8.2.180.0070.01316.75
8.2.170.0140.00722.96
8.2.160.0090.00620.52
8.2.150.0070.00024.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00420.77
8.2.110.0040.00421.96
8.2.100.0130.00317.72
8.2.90.0000.00819.05
8.2.80.0000.00817.97
8.2.70.0070.00417.50
8.2.60.0040.00417.91
8.2.50.0030.00618.07
8.2.40.0030.00619.76
8.2.30.0000.00718.05
8.2.20.0040.00417.65
8.2.10.0030.00617.90
8.2.00.0070.00017.58
8.1.270.0030.00523.91
8.1.260.0040.00426.35
8.1.250.0000.00728.09
8.1.240.0080.00023.95
8.1.230.0120.00019.09
8.1.220.0040.00417.74
8.1.210.0060.00318.77
8.1.200.0080.00017.23
8.1.190.0080.00016.88
8.1.180.0000.00718.10
8.1.170.0080.00018.30
8.1.160.0000.00721.89
8.1.150.0040.00418.41
8.1.140.0040.00417.35
8.1.130.0070.00017.71
8.1.120.0000.00717.25
8.1.110.0060.00317.33
8.1.100.0030.00317.36
8.1.90.0070.00017.28
8.1.80.0040.00417.38
8.1.70.0030.00317.32
8.1.60.0070.00017.38
8.1.50.0040.00417.51
8.1.40.0020.00517.33
8.1.30.0030.00617.47
8.1.20.0040.00417.57
8.1.10.0000.00817.41
8.1.00.0040.00417.33
8.0.300.0040.00418.77
8.0.290.0000.00816.75
8.0.280.0040.00418.32
8.0.270.0000.00717.08
8.0.260.0030.00317.05
8.0.250.0000.00616.79
8.0.240.0030.00316.92
8.0.230.0000.00716.83
8.0.220.0030.00316.68
8.0.210.0040.00416.81
8.0.200.0060.00016.89
8.0.190.0000.00716.87
8.0.180.0000.00816.81
8.0.170.0040.00416.88
8.0.160.0020.00516.83
8.0.150.0070.00316.69
8.0.140.0030.00516.79
8.0.130.0050.00213.25
8.0.120.0000.00816.75
8.0.110.0070.00016.79
8.0.100.0070.00016.80
8.0.90.0050.00316.77
8.0.80.0060.00916.88
8.0.70.0000.00716.86
8.0.60.0030.00316.71
8.0.50.0030.00616.74
8.0.30.0170.00517.19
8.0.20.0120.00617.40
8.0.10.0040.00417.04
8.0.00.0110.00716.89
7.4.330.0060.00015.02
7.4.320.0030.00316.44
7.4.300.0030.00316.49
7.4.290.0030.00316.54
7.4.280.0040.00416.52
7.4.270.0080.00016.51
7.4.260.0040.00416.40
7.4.250.0040.00416.48
7.4.240.0050.00316.39
7.4.230.0000.00716.31
7.4.220.0130.00916.47
7.4.210.0070.00716.54
7.4.200.0000.00716.39
7.4.160.0140.00416.51
7.4.150.0110.00617.40
7.4.140.0080.00917.86
7.4.130.0130.00416.44
7.4.120.0070.01316.37
7.4.110.0070.01016.53
7.4.100.0040.01416.38
7.4.90.0090.00916.55
7.4.80.0200.00019.39
7.4.70.0100.00716.26
7.4.60.0090.00616.51
7.4.50.0040.00416.18
7.4.40.0060.00916.52
7.4.30.0120.00316.29
7.4.00.0070.01014.88
7.3.330.0050.00013.22
7.3.320.0000.00513.05
7.3.310.0030.00316.34
7.3.300.0030.00316.20
7.3.290.0000.01416.37
7.3.280.0070.01116.33
7.3.270.0090.00817.40
7.3.260.0070.01016.29
7.3.250.0120.00816.39
7.3.240.0090.00616.28
7.3.230.0100.01316.39
7.3.210.0120.00816.35
7.3.200.0060.01119.39
7.3.190.0160.00616.41
7.3.180.0130.00316.29
7.3.170.0030.01716.50
7.3.160.0130.00916.42
7.3.120.0060.00814.97
7.2.330.0090.00916.34
7.2.320.0180.00616.37
7.2.310.0070.01416.58
7.2.300.0090.00916.27
7.2.290.0080.01216.35
7.2.00.0000.01219.31
7.1.100.0030.00718.12
7.1.70.0070.00717.10
7.1.60.0060.01919.70
7.1.50.0160.01316.76
7.1.00.0030.07722.48
7.0.200.0040.00416.57
7.0.140.0000.07722.07
7.0.60.0030.06719.90
7.0.50.0130.07717.66
7.0.40.0070.04020.41
7.0.30.0670.06020.34
7.0.20.0370.07020.20
7.0.10.0070.04720.09
7.0.00.0070.09020.17
5.6.280.0000.07720.98
5.6.210.0070.08320.50
5.6.200.0100.06318.11
5.6.190.0070.05320.55
5.6.180.3630.04020.43
5.6.170.0230.03720.48
5.6.160.0070.04320.41
5.6.150.0130.06018.11
5.6.140.0000.08318.11
5.6.130.0070.06318.20
5.6.120.0100.04721.13
5.6.110.0070.08320.98
5.6.100.0070.08721.10
5.6.90.0070.04320.97
5.6.80.0100.08020.38
5.6.70.3170.03020.36
5.5.350.0300.06720.42
5.5.340.0000.04318.01
5.5.330.0070.07720.40
5.5.320.3330.04320.20
5.5.310.0230.06320.46
5.5.300.0130.07317.99
5.5.290.0070.05017.98
5.5.280.0070.08320.75
5.5.270.0100.05020.78
5.5.260.0000.04720.87
5.5.250.0130.05320.60
5.5.240.0330.06720.34
5.4.450.0300.03729.93
5.4.440.0430.04029.93
5.4.430.0230.04729.93
5.4.420.0230.05029.93
5.4.410.0270.04329.93
5.4.400.0430.04029.93
5.4.390.0200.04029.92
5.4.380.0230.07018.51
5.4.370.0130.05318.69
5.4.360.0170.05018.50
5.4.350.0170.08018.57
5.4.340.0170.05018.51
5.4.320.0040.03612.45
5.4.310.0060.04512.45
5.4.300.0060.03712.45
5.4.290.0070.03712.45
5.4.280.0050.03612.34
5.4.270.0040.03812.35
5.4.260.0040.03912.34
5.4.250.0050.03812.34
5.4.240.0030.03912.34
5.4.230.0050.03912.34
5.4.220.0080.03512.34
5.4.210.0060.03512.34
5.4.200.0030.04212.34
5.4.190.0050.03812.34
5.4.180.0090.03412.34
5.4.170.0120.03312.34
5.4.160.0090.03512.34
5.4.150.0040.04412.34
5.4.140.0070.03812.02
5.4.130.0050.03812.01
5.4.120.0060.03711.97
5.4.110.0070.03511.96
5.4.100.0070.03511.96
5.4.90.0070.03611.96
5.4.80.0040.03911.96
5.4.70.0080.03411.96
5.4.60.0050.03611.96
5.4.50.0040.03811.96
5.4.40.0040.03611.95
5.4.30.0040.03711.95
5.4.20.0050.03611.95
5.4.10.0060.03511.95
5.4.00.0080.03511.43
5.3.290.0140.03912.80
5.3.280.0080.03612.71
5.3.270.0040.04212.72
5.3.260.0040.04212.72
5.3.250.0080.03612.72
5.3.240.0060.03712.72
5.3.230.0040.04012.71
5.3.220.0090.03412.68
5.3.210.0090.04312.68
5.3.200.0070.03612.68
5.3.190.0060.03812.68
5.3.180.0050.03912.68
5.3.170.0060.03612.67
5.3.160.0110.03312.67
5.3.150.0030.04012.67
5.3.140.0070.03512.66
5.3.130.0060.04012.66
5.3.120.0100.03912.66
5.3.110.0040.04212.66
5.3.100.0070.03612.12
5.3.90.0030.03912.08
5.3.80.0070.03612.08
5.3.70.0060.03712.07
5.3.60.0050.03712.07
5.3.50.0090.03312.00
5.3.40.0060.03612.00
5.3.30.0060.03511.94
5.3.20.0060.03611.72
5.3.10.0070.03511.69
5.3.00.0040.03811.68
5.2.170.0070.0299.18
5.2.160.0060.0289.18
5.2.150.0060.0299.18
5.2.140.0040.0329.18
5.2.130.0050.0309.13
5.2.120.0080.0269.14
5.2.110.0050.0309.14
5.2.100.0050.0289.14
5.2.90.0050.0299.14
5.2.80.0070.0309.14
5.2.70.0040.0319.14
5.2.60.0070.0299.09
5.2.50.0040.0319.05
5.2.40.0070.0269.03
5.2.30.0050.0319.01
5.2.20.0030.0308.99
5.2.10.0030.0308.93
5.2.00.0050.0288.79
5.1.60.0070.0218.08
5.1.50.0030.0268.07
5.1.40.0060.0238.05
5.1.30.0040.0288.41
5.1.20.0060.0268.43
5.1.10.0050.0258.15
5.1.00.0060.0238.14
5.0.50.0050.0196.63
5.0.40.0040.0196.48
5.0.30.0050.0296.30
5.0.20.0040.0196.27
5.0.10.0030.0216.24
5.0.00.0070.0266.23
4.4.90.0020.0164.78
4.4.80.0030.0154.76
4.4.70.0020.0164.75
4.4.60.0020.0164.75
4.4.50.0000.0184.77
4.4.40.0010.0274.71
4.4.30.0040.0144.76
4.4.20.0050.0134.85
4.4.10.0040.0144.84
4.4.00.0030.0244.75
4.3.110.0020.0164.67
4.3.100.0010.0164.67
4.3.90.0020.0154.64
4.3.80.0010.0264.58
4.3.70.0000.0174.63
4.3.60.0010.0164.63
4.3.50.0030.0154.63
4.3.40.0080.0194.53
4.3.30.0020.0163.29
4.3.20.0000.0183.27
4.3.10.0010.0163.23
4.3.00.0000.02029.52

preferences:
52.37 ms | 400 KiB | 5 Q