3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(null); var_dump( empty( $a ) ); //bool(false) var_dump( !(bool)$a ); //bool(true) $b = array(false); var_dump( empty( $b ) ); //bool(false) var_dump( !(bool)$b ); //bool(true) $c = array(0); var_dump( empty( $c ) ); //bool(false) var_dump( !(bool)$c ); //bool(false) $d = array(''); var_dump( empty( $d ) ); //bool(false) var_dump( !(bool)$d ); //bool(false) $e = array(); var_dump( empty( $e ) ); //bool(true) var_dump( !(bool)$e ); //bool(false)

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)
8.3.40.0030.01418.63
8.3.30.0110.00419.01
8.3.20.0040.00420.16
8.3.10.0040.00423.57
8.3.00.0000.00820.59
8.2.170.0110.00322.96
8.2.160.0070.00720.47
8.2.150.0000.00824.18
8.2.140.0080.00024.66
8.2.130.0110.00426.16
8.2.120.0080.00022.27
8.2.110.0030.00622.15
8.2.100.0060.00617.78
8.2.90.0070.00019.05
8.2.80.0050.00317.97
8.2.70.0090.00017.38
8.2.60.0000.00718.04
8.2.50.0040.00418.07
8.2.40.0080.00018.28
8.2.30.0000.01118.03
8.2.20.0050.00217.69
8.2.10.0000.00817.66
8.2.00.0000.00817.58
8.1.270.0000.00823.70
8.1.260.0040.00426.35
8.1.250.0050.00228.09
8.1.240.0000.00923.74
8.1.230.0070.00319.09
8.1.220.0040.00417.74
8.1.210.0030.00618.77
8.1.200.0100.00017.35
8.1.190.0030.00517.50
8.1.180.0000.00918.10
8.1.170.0060.00318.61
8.1.160.0000.00722.11
8.1.150.0040.00418.63
8.1.140.0040.00417.34
8.1.130.0000.00717.86
8.1.120.0030.00517.42
8.1.110.0070.00017.45
8.1.100.0030.00417.40
8.1.90.0050.00217.40
8.1.80.0030.00717.32
8.1.70.0040.00417.41
8.1.60.0040.00417.45
8.1.50.0000.00817.43
8.1.40.0050.00217.40
8.1.30.0040.00417.54
8.1.20.0040.00417.65
8.1.10.0060.00317.30
8.1.00.0040.00417.34
8.0.300.0070.00018.77
8.0.290.0000.00717.18
8.0.280.0030.00318.43
8.0.270.0020.00417.13
8.0.260.0070.00016.86
8.0.250.0030.00316.96
8.0.240.0080.00016.97
8.0.230.0090.00016.80
8.0.220.0050.00316.86
8.0.210.0000.00816.79
8.0.200.0030.00316.91
8.0.190.0040.00416.92
8.0.180.0030.00516.93
8.0.170.0000.00716.77
8.0.160.0040.00416.92
8.0.150.0030.00316.86
8.0.140.0040.00416.83
8.0.130.0000.00613.30
8.0.120.0040.00416.82
8.0.110.0040.00416.74
8.0.100.0030.00516.73
8.0.90.0070.00016.85
8.0.80.0150.00616.89
8.0.70.0040.00416.77
8.0.60.0040.00416.79
8.0.50.0000.00816.79
8.0.30.0120.00617.03
8.0.20.0100.01217.40
8.0.10.0030.00516.89
8.0.00.0090.01016.78
7.4.330.0000.00515.02
7.4.320.0000.00616.49
7.4.300.0030.00316.57
7.4.290.0020.00516.61
7.4.280.0040.00416.43
7.4.270.0030.00316.62
7.4.260.0030.00616.50
7.4.250.0080.00016.59
7.4.240.0000.00716.48
7.4.230.0030.00316.30
7.4.220.0070.01116.66
7.4.210.0070.00716.48
7.4.200.0030.00316.31
7.4.190.0030.00316.64
7.4.160.0160.00016.41
7.4.150.0110.00617.40
7.4.140.0080.01017.86
7.4.130.0090.00716.48
7.4.120.0110.00616.60
7.4.110.0130.00316.48
7.4.100.0090.00916.52
7.4.90.0100.00616.57
7.4.80.0170.00019.39
7.4.70.0100.00716.39
7.4.60.0130.01016.51
7.4.50.0040.00416.37
7.4.40.0030.01022.77
7.4.30.0110.00616.38
7.4.00.0090.00914.84
7.3.330.0000.00512.93
7.3.320.0000.00513.12
7.3.310.0040.00416.23
7.3.300.0060.00016.16
7.3.290.0120.00616.12
7.3.280.0120.00616.19
7.3.270.0140.00517.40
7.3.260.0140.00716.09
7.3.250.0100.00916.33
7.3.240.0100.00716.11
7.3.230.0150.00616.39
7.3.210.0130.00316.09
7.3.200.0130.01019.39
7.3.190.0100.01016.18
7.3.180.0090.00916.24
7.3.170.0140.00316.27
7.3.160.0080.00816.21
7.3.120.0070.01114.86
7.2.330.0140.00316.66
7.2.320.0100.01116.39
7.2.310.0060.01016.59
7.2.300.0140.00316.36
7.2.290.0110.00516.42
7.2.00.0030.01319.39
7.1.200.0030.00915.66
7.1.100.0070.00417.91
7.1.70.0000.00716.82
7.1.60.0060.01919.29
7.1.50.0080.01216.83
7.1.00.0000.08022.45
7.0.200.0000.00716.61
7.0.140.0070.06322.04
7.0.60.0030.04019.98
7.0.50.0070.07717.87
7.0.40.0100.08720.27
7.0.30.0170.04320.21
7.0.20.0300.08020.00
7.0.10.0370.06720.21
7.0.00.0100.04020.11
5.6.280.0000.07321.13
5.6.210.0100.07720.74
5.6.200.0030.08318.16
5.6.190.0070.04720.35
5.6.180.0000.06020.61
5.6.170.0270.07720.71
5.6.160.0100.03720.47
5.6.150.0030.04718.20
5.6.140.0070.05718.19
5.6.130.0100.08318.20
5.6.120.0070.08721.11
5.6.110.0030.08721.08
5.6.100.0100.08020.98
5.6.90.0070.08720.96
5.6.80.0100.07320.53
5.6.70.0300.07020.48
5.5.350.0100.07720.31
5.5.340.0130.07717.99
5.5.330.0030.05020.40
5.5.320.0030.04020.30
5.5.310.0270.07320.13
5.5.300.0070.05018.01
5.5.290.0030.06717.93
5.5.280.0070.07720.76
5.5.270.0070.08720.67
5.5.260.0030.05720.86
5.5.250.0170.07020.68
5.5.240.0100.07720.27
5.4.450.0830.03019.21
5.4.440.0700.08719.48
5.4.430.0830.05719.44
5.4.420.0270.05319.24
5.4.410.0800.04719.49
5.4.400.0130.06719.22
5.4.390.0770.06018.94
5.4.380.0300.04318.73
5.4.370.0230.05018.56
5.4.360.0300.04318.72
5.4.350.0170.05718.70
5.4.340.0170.06018.73
5.4.320.0070.03612.45
5.4.310.0100.06212.45
5.4.300.0090.03612.45
5.4.290.0060.03812.45
5.4.280.0060.03512.35
5.4.270.0060.03512.31
5.4.260.0060.03712.31
5.4.250.0070.03612.32
5.4.240.0080.04112.32
5.4.230.0060.04012.31
5.4.220.0050.03612.30
5.4.210.0040.03912.30
5.4.200.0090.03912.31
5.4.190.0090.03512.30
5.4.180.0090.03712.30
5.4.170.0050.03612.31
5.4.160.0060.03712.31
5.4.150.0080.04712.30
5.4.140.0080.03811.98
5.4.130.0110.03111.98
5.4.120.0070.03411.93
5.4.110.0080.03411.93
5.4.100.0070.03411.93
5.4.90.0080.03811.93
5.4.80.0100.04711.93
5.4.70.0050.03611.92
5.4.60.0050.03511.93
5.4.50.0060.03511.92
5.4.40.0080.03211.91
5.4.30.0040.03711.91
5.4.20.0050.03611.91
5.4.10.0060.03511.91
5.4.00.0050.03711.40
5.3.290.0090.03712.80
5.3.280.0060.03912.71
5.3.270.0020.04312.73
5.3.260.0060.04012.71
5.3.250.0060.03812.72
5.3.240.0080.03512.72
5.3.230.0060.03812.71
5.3.220.0090.03512.68
5.3.210.0040.04112.68
5.3.200.0070.03512.68
5.3.190.0060.03812.68
5.3.180.0080.03512.67
5.3.170.0030.04012.66
5.3.160.0060.03612.67
5.3.150.0080.04012.68
5.3.140.0060.03612.66
5.3.130.0060.04312.66
5.3.120.0060.03912.66
5.3.110.0060.03812.66
5.3.100.0060.03612.12
5.3.90.0060.03612.08
5.3.80.0080.03412.07
5.3.70.0060.03712.08
5.3.60.0070.03812.06
5.3.50.0060.03612.00
5.3.40.0040.03812.00
5.3.30.0100.03511.94
5.3.20.0060.03411.70
5.3.10.0050.03511.66
5.3.00.0040.03811.64
5.2.170.0050.0389.15
5.2.160.0090.0289.15
5.2.150.0090.0269.15
5.2.140.0060.0319.15
5.2.130.0050.0309.11
5.2.120.0100.0249.11
5.2.110.0050.0289.11
5.2.100.0040.0299.12
5.2.90.0050.0289.11
5.2.80.0030.0319.11
5.2.70.0050.0299.10
5.2.60.0040.0309.05
5.2.50.0030.0349.03
5.2.40.0040.0319.00
5.2.30.0060.0338.98
5.2.20.0020.0348.96
5.2.10.0030.0348.89
5.2.00.0050.0308.75
5.1.60.0060.0268.04
5.1.50.0040.0248.04
5.1.40.0030.0258.03
5.1.30.0060.0248.36
5.1.20.0050.0268.39
5.1.10.0030.0278.12
5.1.00.0050.0288.12
5.0.50.0040.0266.60
5.0.40.0030.0216.45
5.0.30.0050.0296.27
5.0.20.0020.0276.24
5.0.10.0010.0226.21
5.0.00.0030.0326.21
4.4.90.0050.0154.78
4.4.80.0010.0174.75
4.4.70.0010.0174.75
4.4.60.0030.0164.76
4.4.50.0010.0164.77
4.4.40.0030.0244.71
4.4.30.0010.0174.76
4.4.20.0050.0164.85
4.4.10.0020.0164.85
4.4.00.0030.0304.76
4.3.110.0070.0174.67
4.3.100.0040.0134.66
4.3.90.0020.0154.63
4.3.80.0020.0274.58
4.3.70.0050.0234.63
4.3.60.0030.0164.63
4.3.50.0020.0174.63
4.3.40.0020.0354.54
4.3.30.0000.0183.27
4.3.20.0040.0143.26
4.3.10.0030.0173.22
4.3.00.0200.01713.14

preferences:
47.11 ms | 400 KiB | 5 Q