3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = '0'; $b = 'NULL'; var_dump($a == $b); var_dump(is_null($a)); var_dump(is_null($b)); var_dump(empty($a)); var_dump(empty($b)); var_dump($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)
8.3.40.0110.00418.58
8.3.30.0100.01018.79
8.3.20.0000.00720.22
8.3.10.0040.00421.60
8.3.00.0040.00419.25
8.2.170.0140.00718.66
8.2.160.0090.00622.96
8.2.150.0040.00424.18
8.2.140.0090.00024.66
8.2.130.0070.00026.16
8.2.120.0040.00419.23
8.2.110.0000.01021.04
8.2.100.0040.00819.23
8.2.90.0000.00719.09
8.2.80.0040.00417.97
8.2.70.0080.00017.50
8.2.60.0040.00417.92
8.2.50.0030.00518.07
8.2.40.0080.00019.82
8.2.30.0050.00217.86
8.2.20.0000.00717.60
8.2.10.0000.00818.03
8.2.00.0040.00417.59
8.1.270.0040.00418.88
8.1.260.0030.00626.35
8.1.250.0070.00028.09
8.1.240.0030.00620.86
8.1.230.0030.00917.52
8.1.220.0000.00817.74
8.1.210.0040.00418.77
8.1.200.0030.00617.23
8.1.190.0000.00817.13
8.1.180.0000.00818.10
8.1.170.0080.00020.38
8.1.160.0070.00021.95
8.1.150.0040.00418.74
8.1.140.0000.00717.35
8.1.130.0030.00317.77
8.1.120.0040.00417.45
8.1.110.0070.00017.43
8.1.100.0030.00317.38
8.1.90.0070.00017.38
8.1.80.0040.00417.43
8.1.70.0080.00017.45
8.1.60.0040.00417.58
8.1.50.0040.00417.37
8.1.40.0000.01117.40
8.1.30.0030.00517.50
8.1.20.0070.00017.53
8.1.10.0070.00317.34
8.1.00.0040.00417.38
8.0.300.0040.00418.77
8.0.290.0030.00416.58
8.0.280.0070.00018.36
8.0.270.0030.00317.22
8.0.260.0040.00418.41
8.0.250.0000.00716.85
8.0.240.0070.00016.88
8.0.230.0030.00316.76
8.0.220.0030.00316.80
8.0.210.0000.00716.80
8.0.200.0000.00616.91
8.0.190.0040.00416.89
8.0.180.0040.00416.80
8.0.170.0070.00016.82
8.0.160.0000.00816.72
8.0.150.0000.00816.68
8.0.140.0040.00416.75
8.0.130.0040.00413.30
8.0.120.0000.00716.79
8.0.110.0040.00416.85
8.0.100.0040.00416.77
8.0.90.0050.00216.77
8.0.80.0090.00616.80
8.0.70.0040.00416.77
8.0.60.0000.00716.83
8.0.50.0000.00716.89
8.0.30.0100.01317.13
8.0.20.0080.01117.40
8.0.10.0050.00316.84
8.0.00.0110.00716.65
7.4.330.0000.00715.03
7.4.320.0030.00316.63
7.4.300.0000.00616.48
7.4.290.0000.00716.50
7.4.280.0040.00416.47
7.4.270.0030.00316.59
7.4.260.0000.00716.58
7.4.250.0000.00716.50
7.4.240.0040.00416.52
7.4.230.0030.00316.32
7.4.220.0060.01616.45
7.4.210.0040.01116.59
7.4.200.0000.00716.52
7.4.160.0090.00616.31
7.4.150.0120.00617.40
7.4.140.0110.00817.86
7.4.130.0110.00716.41
7.4.120.0080.01316.45
7.4.110.0090.00916.29
7.4.100.0090.00916.30
7.4.90.0130.00316.52
7.4.80.0100.00919.39
7.4.70.0070.01116.60
7.4.60.0120.00416.55
7.4.50.0020.00216.30
7.4.40.0070.01516.46
7.4.30.0090.01216.53
7.4.00.0120.00314.50
7.3.330.0000.00512.95
7.3.320.0090.00513.08
7.3.310.0030.00316.18
7.3.300.0000.00616.19
7.3.290.0100.00516.15
7.3.280.0110.00816.19
7.3.270.0090.00917.40
7.3.260.0070.01016.16
7.3.250.0130.00516.21
7.3.240.0140.00616.21
7.3.230.0120.00616.44
7.3.210.0070.01016.24
7.3.200.0160.00619.39
7.3.190.0100.01016.37
7.3.180.0120.00616.40
7.3.170.0090.00916.29
7.3.160.0030.01416.34
7.3.10.0060.00916.61
7.3.00.0030.00916.64
7.2.330.0120.00916.56
7.2.320.0030.01216.47
7.2.310.0090.01216.66
7.2.300.0070.00916.30
7.2.290.0000.01816.65
7.2.130.0030.01016.82
7.2.120.0090.00616.63
7.2.110.0100.00316.96
7.2.100.0070.01116.99
7.2.90.0040.01116.63
7.2.80.0040.00716.88
7.2.70.0090.00616.83
7.2.60.0020.01316.69
7.2.50.0000.01116.93
7.2.40.0060.00916.89
7.2.30.0070.00716.95
7.2.20.0030.00616.90
7.2.10.0030.01016.65
7.2.00.0060.00617.93
7.1.250.0080.00415.61
7.1.200.0060.00615.85
7.1.100.0070.00717.95
7.1.70.0030.00517.06
7.1.60.0130.01319.50
7.1.50.0070.01416.98
7.1.00.0000.08022.45
7.0.200.0180.00714.69
7.0.140.0100.06722.12
7.0.60.0230.08319.92
7.0.50.0000.04317.88
7.0.40.0000.04720.06
7.0.30.0300.07720.01
7.0.20.0270.08719.99
7.0.10.0300.08020.09
7.0.00.0200.08020.13
5.6.280.0070.06720.91
5.6.210.0100.06320.56
5.6.200.0000.04318.17
5.6.190.0030.05020.63
5.6.180.0230.04020.46
5.6.170.0330.04720.62
5.6.160.0000.05320.50
5.6.150.0070.08318.09
5.6.140.0070.03718.16
5.6.130.0000.08018.18
5.6.120.0070.08720.98
5.6.110.0070.08021.00
5.6.100.0130.06021.10
5.6.90.0030.08321.09
5.6.80.0030.08720.36
5.5.350.0330.06720.38
5.5.340.0230.07017.89
5.5.330.0130.08020.37
5.5.320.0000.04720.15
5.5.310.0200.04020.34
5.5.300.0100.07717.98
5.5.290.0070.07317.92
5.5.280.0070.04020.64
5.5.270.0100.06720.63
5.5.260.0100.08320.95
5.5.250.0070.06020.60
5.5.240.0170.05020.25
5.4.450.0400.04719.46
5.4.440.0730.05719.42
5.4.430.0700.05719.48
5.4.420.0770.06319.27
5.4.410.0070.05718.89
5.4.400.0370.06318.60
5.4.390.0400.05718.75
5.4.380.0500.05318.72
5.4.370.0430.06718.69
5.4.360.0330.08318.57
5.4.350.0370.08318.57
5.4.340.0400.06018.83
5.4.320.0430.05718.62
5.4.310.0430.07318.60
5.4.300.0370.06018.68
5.4.290.0430.06018.48
5.4.280.0470.05718.79
5.4.270.0470.06018.73
5.4.260.0430.06018.68
5.4.250.0470.09018.71
5.4.240.0500.06718.64
5.4.230.0570.06018.61
5.4.220.0230.08318.55
5.4.210.0530.06018.71
5.4.200.0430.06016.55
5.4.190.0430.05318.45
5.4.180.0470.07018.68
5.4.170.0470.08018.47
5.4.160.0400.05718.72
5.4.150.0470.05318.58
5.4.140.0370.06316.07
5.4.130.0530.05716.13
5.4.120.0630.06016.41
5.4.110.0430.06316.19
5.4.100.0530.04716.21
5.4.90.0500.07316.11
5.4.80.0430.06016.15
5.4.70.0400.07316.17
5.4.60.0430.06016.32
5.4.50.0530.06316.03
5.4.40.0430.05716.01
5.4.30.0570.05716.17
5.4.20.0600.05716.21
5.4.10.0570.05716.05
5.4.00.0300.06015.64
5.3.290.0370.06314.55
5.3.280.0470.07714.57
5.3.270.0630.06014.57
5.3.260.0400.06314.59
5.3.250.0530.07014.70
5.3.240.0470.06314.65
5.3.230.0330.08014.56
5.3.220.0370.06714.49
5.3.210.0300.07314.54
5.3.200.0400.06314.59
5.3.190.0400.05714.54
5.3.180.0630.07014.59
5.3.170.0630.06314.65
5.3.160.0600.05314.55
5.3.150.0370.06314.54
5.3.140.0370.06014.47
5.3.130.0400.05714.54
5.3.120.0370.06314.58
5.3.110.0430.07014.47
5.3.100.0330.07013.94
5.3.90.0670.06014.09
5.3.80.0370.07313.98
5.3.70.0370.07014.01
5.3.60.0470.07313.91
5.3.50.0470.06713.92
5.3.40.0430.05713.97
5.3.30.0530.06713.90
5.3.20.0530.05713.62
5.3.10.0500.03713.65
5.3.00.0500.06313.63
5.2.170.0400.04711.18
5.2.160.0330.05711.11
5.2.150.0300.04311.13
5.2.140.0430.05711.05
5.2.130.0400.04711.26
5.2.120.0470.05011.13
5.2.110.0500.04011.09
5.2.100.0170.05011.10
5.2.90.0300.04311.26
5.2.80.0300.06311.08
5.2.70.0470.05011.15
5.2.60.0330.04711.03
5.2.50.0270.05710.93
5.2.40.0230.05310.95
5.2.30.0400.05310.97
5.2.20.0270.05010.90
5.2.10.0170.05710.83
5.2.00.0470.04010.77
5.1.60.0330.04310.00
5.1.50.0470.04710.11
5.1.40.0270.03710.07
5.1.30.0270.03310.48
5.1.20.0370.03310.50
5.1.10.0230.04010.13
5.1.00.0270.04010.16
5.0.50.0170.0308.66
5.0.40.0170.0408.47
5.0.30.0230.0538.25
5.0.20.0270.0278.22
5.0.10.0200.0278.35
5.0.00.0270.0478.18
4.4.90.0130.0235.94
4.4.80.0130.0175.82
4.4.70.0130.0235.91
4.4.60.0130.0305.86
4.4.50.0070.0375.89
4.4.40.0200.0405.90
4.4.30.0130.0275.94
4.4.20.0100.0275.87
4.4.10.0170.0205.93
4.4.00.0130.0375.93
4.3.110.0130.0275.77
4.3.100.0170.0305.74
4.3.90.0330.0275.77
4.3.80.0170.0335.82
4.3.70.0230.0275.80
4.3.60.0100.0335.80
4.3.50.0170.0235.79
4.3.40.0100.0335.76
4.3.30.0100.0304.87
4.3.20.0070.0334.87
4.3.10.0070.0274.87
4.3.00.0100.0206.69

preferences:
40.09 ms | 400 KiB | 5 Q