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 == '0');

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)
8.3.40.0040.01118.54
8.3.30.0100.01018.98
8.3.20.0070.00020.09
8.3.10.0000.00721.82
8.3.00.0000.00819.26
8.2.170.0110.00422.96
8.2.160.0110.00320.43
8.2.150.0070.00024.18
8.2.140.0000.00824.66
8.2.130.0070.00026.16
8.2.120.0050.00319.23
8.2.110.0170.00720.57
8.2.100.0040.00717.89
8.2.90.0000.00819.09
8.2.80.0040.00417.97
8.2.70.0000.00817.63
8.2.60.0060.00317.80
8.2.50.0050.00318.07
8.2.40.0000.00919.95
8.2.30.0050.00317.96
8.2.20.0040.00417.61
8.2.10.0050.00318.04
8.2.00.0000.00717.53
8.1.270.0050.00318.87
8.1.260.0080.00026.35
8.1.250.0070.00028.09
8.1.240.0070.01023.83
8.1.230.0040.00722.11
8.1.220.0000.00817.74
8.1.210.0060.00318.77
8.1.200.0060.00317.25
8.1.190.0040.00417.13
8.1.180.0060.00318.10
8.1.170.0000.00918.64
8.1.160.0050.00221.91
8.1.150.0040.00418.93
8.1.140.0080.00017.31
8.1.130.0040.00417.80
8.1.120.0050.00217.43
8.1.110.0040.00417.27
8.1.100.0000.00717.48
8.1.90.0040.00417.42
8.1.80.0040.00417.45
8.1.70.0030.00317.50
8.1.60.0000.00817.48
8.1.50.0000.00817.45
8.1.40.0000.01017.41
8.1.30.0050.00317.61
8.1.20.0000.00817.54
8.1.10.0030.00617.39
8.1.00.0040.00417.36
8.0.300.0040.00418.77
8.0.290.0080.00016.63
8.0.280.0000.00718.30
8.0.270.0030.00317.19
8.0.260.0030.00318.30
8.0.250.0000.00716.91
8.0.240.0000.00816.86
8.0.230.0000.00716.82
8.0.220.0000.00716.81
8.0.210.0030.00316.80
8.0.200.0020.00516.78
8.0.190.0050.00316.76
8.0.180.0060.00316.85
8.0.170.0040.00416.82
8.0.160.0040.00416.71
8.0.150.0040.00416.68
8.0.140.0000.00716.72
8.0.130.0060.00013.23
8.0.120.0000.00716.83
8.0.110.0040.00416.82
8.0.100.0050.00316.66
8.0.90.0070.00016.60
8.0.80.0090.00916.74
8.0.70.0020.00516.88
8.0.60.0040.00416.75
8.0.50.0000.00716.65
8.0.30.0080.00517.06
8.0.20.0090.01117.40
8.0.10.0040.00416.88
8.0.00.0110.00716.67
7.4.330.0030.00315.03
7.4.320.0030.00316.58
7.4.300.0030.00316.60
7.4.290.0000.00716.59
7.4.280.0090.00016.45
7.4.270.0000.00716.57
7.4.260.0030.00316.57
7.4.250.0000.00716.46
7.4.240.0020.00516.44
7.4.230.0070.00016.33
7.4.220.0120.01016.56
7.4.210.0050.00816.50
7.4.200.0070.00016.25
7.4.160.0090.00616.30
7.4.150.0120.00617.40
7.4.140.0130.00517.86
7.4.130.0100.00816.49
7.4.120.0160.00716.50
7.4.110.0160.00716.50
7.4.100.0110.00616.43
7.4.90.0100.01016.43
7.4.80.0120.00919.39
7.4.70.0030.01516.38
7.4.60.0060.01016.37
7.4.50.0000.00516.28
7.4.40.0130.00916.41
7.4.30.0100.01016.64
7.4.00.0100.00315.06
7.3.330.0000.00612.88
7.3.320.0140.00013.02
7.3.310.0030.00315.98
7.3.300.0000.00716.17
7.3.290.0100.00416.21
7.3.280.0050.01316.19
7.3.270.0070.01117.40
7.3.260.0130.01016.13
7.3.250.0130.00516.36
7.3.240.0100.01016.64
7.3.230.0150.00316.48
7.3.210.0070.01016.11
7.3.200.0070.01419.39
7.3.190.0070.01016.35
7.3.180.0130.01016.18
7.3.170.0130.00716.27
7.3.160.0100.00616.17
7.2.330.0060.01216.71
7.2.320.0000.01616.41
7.2.310.0130.00316.68
7.2.300.0110.00716.24
7.2.290.0090.00816.62
7.2.00.0080.00819.38
7.1.100.0040.00818.23
7.1.70.0040.00416.97
7.1.60.0040.02119.50
7.1.50.0130.01016.91
7.1.00.0070.07322.28
7.0.200.0400.00314.30
7.0.140.0000.07322.11
7.0.60.0070.06020.02
7.0.50.0070.07717.81
7.0.40.0100.09020.30
7.0.30.0330.07720.15
7.0.20.0270.08320.39
7.0.10.0130.07320.01
7.0.00.0070.04020.20
5.6.280.0100.06720.88
5.6.210.0130.07320.50
5.6.200.0030.08318.21
5.6.190.0070.04020.41
5.6.180.0270.04720.57
5.6.170.0330.07320.33
5.6.160.0070.04320.44
5.6.150.0100.03718.09
5.6.140.0070.08018.19
5.6.130.0170.03318.07
5.6.120.0070.08321.08
5.6.110.0070.07020.86
5.6.100.0030.04721.12
5.6.90.0130.08321.09
5.6.80.0070.05020.38
5.5.350.3970.04020.40
5.5.340.0200.07018.02
5.5.330.0130.03320.15
5.5.320.0270.03720.34
5.5.310.0230.05320.26
5.5.300.0030.03718.05
5.5.290.0070.04317.89
5.5.280.0000.08020.89
5.5.270.0130.05320.75
5.5.260.0030.04020.80
5.5.250.0100.07720.79
5.5.240.0000.04020.25
5.4.450.0670.06019.41
5.4.440.0830.05719.48
5.4.430.0430.06719.57
5.4.420.0130.06719.27
5.4.410.0100.07318.99
5.4.400.0500.07718.69
5.4.390.0470.06318.59
5.4.380.0370.06718.59
5.4.370.0300.06318.77
5.4.360.0400.06718.53
5.4.350.0430.06318.72
5.4.340.0330.05718.74
5.4.320.0070.06018.58
5.4.310.0230.05718.68
5.4.300.0400.08018.55
5.4.290.0270.06318.70
5.4.280.0570.05018.50
5.4.270.0330.06718.59
5.4.260.0400.06018.62
5.4.250.0430.05018.48
5.4.240.0330.06018.73
5.4.230.0430.05318.60
5.4.220.0570.07018.67
5.4.210.0530.06718.51
5.4.200.0500.06716.56
5.4.190.0330.07318.54
5.4.180.0470.06718.42
5.4.170.0530.07018.66
5.4.160.0330.07318.75
5.4.150.0500.06318.67
5.4.140.0230.06316.11
5.4.130.0400.05716.14
5.4.120.0300.05716.15
5.4.110.0430.05016.09
5.4.100.0370.05316.09
5.4.90.0400.06016.35
5.4.80.0370.05716.04
5.4.70.0430.06716.19
5.4.60.0300.07316.20
5.4.50.0430.04716.05
5.4.40.0400.06016.34
5.4.30.0370.05716.11
5.4.20.0530.05316.22
5.4.10.0430.05716.12
5.4.00.0300.06315.84
5.3.290.0570.08714.71
5.3.280.0730.07714.54
5.3.270.0470.07314.61
5.3.260.0500.07314.68
5.3.250.0470.06314.61
5.3.240.0330.06314.60
5.3.230.0370.05714.50
5.3.220.0330.06314.50
5.3.210.0500.07014.56
5.3.200.0400.06314.63
5.3.190.0200.07014.55
5.3.180.0370.05714.54
5.3.170.0300.06314.54
5.3.160.0430.05314.56
5.3.150.0300.08314.59
5.3.140.0570.04314.52
5.3.130.0400.06314.63
5.3.120.0400.05314.59
5.3.110.0470.06314.62
5.3.100.0270.06014.00
5.3.90.0370.06014.09
5.3.80.0330.06013.99
5.3.70.0330.05013.95
5.3.60.0430.05313.96
5.3.50.0600.06714.03
5.3.40.0570.06714.03
5.3.30.0470.06013.89
5.3.20.0530.07013.64
5.3.10.0370.07713.64
5.3.00.0530.06713.66
5.2.170.0400.05311.18
5.2.160.0400.04711.18
5.2.150.0430.06011.13
5.2.140.0330.05011.28
5.2.130.0270.04711.13
5.2.120.0300.04711.05
5.2.110.0270.06311.11
5.2.100.0370.04311.08
5.2.90.0300.05011.07
5.2.80.0330.04011.23
5.2.70.0230.05311.08
5.2.60.0430.04710.97
5.2.50.0470.05010.96
5.2.40.0300.05711.07
5.2.30.0330.05310.90
5.2.20.0330.04710.96
5.2.10.0330.05010.91
5.2.00.0300.06010.85
5.1.60.0230.05710.05
5.1.50.0400.04310.01
5.1.40.0270.0439.93
5.1.30.0270.03710.37
5.1.20.0330.04010.40
5.1.10.0300.04710.05
5.1.00.0330.04310.10
5.0.50.0170.0308.56
5.0.40.0130.0338.46
5.0.30.0130.0538.28
5.0.20.0130.0308.32
5.0.10.0100.0308.29
5.0.00.0130.0438.17
4.4.90.0100.0305.88
4.4.80.0230.0275.89
4.4.70.0100.0235.81
4.4.60.0000.0305.88
4.4.50.0000.0305.93
4.4.40.0070.0375.91
4.4.30.0130.0205.90
4.4.20.0300.0206.00
4.4.10.0130.0275.91
4.4.00.0170.0335.85
4.3.110.0130.0305.88
4.3.100.0130.0335.86
4.3.90.0100.0305.90
4.3.80.0130.0435.81
4.3.70.0130.0275.77
4.3.60.0170.0275.79
4.3.50.0200.0275.91
4.3.40.0100.0435.75
4.3.30.0100.0204.88
4.3.20.0000.0304.88
4.3.10.0070.0204.88
4.3.00.0100.0206.95

preferences:
45.53 ms | 400 KiB | 5 Q