3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x['y'] = null; var_dump(isset($x['y'])); var_dump(!empty($x['y']));

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)
8.3.60.0170.00416.62
8.3.50.0080.01321.99
8.3.40.0090.00618.77
8.3.30.0100.00718.72
8.3.20.0080.00020.23
8.3.10.0040.00423.65
8.3.00.0060.00319.50
8.2.180.0140.00718.11
8.2.170.0100.00722.96
8.2.160.0100.01022.11
8.2.150.0000.00824.18
8.2.140.0070.00024.66
8.2.130.0040.00426.16
8.2.120.0140.00017.38
8.2.110.0030.00621.06
8.2.100.0040.00817.84
8.2.90.0080.00019.14
8.2.80.0060.00317.97
8.2.70.0030.00619.36
8.2.60.0000.00717.93
8.2.50.0050.00318.10
8.2.40.0000.00720.43
8.2.30.0040.00420.49
8.2.20.0040.00417.61
8.2.10.0000.00718.11
8.2.00.0000.00718.03
8.1.280.0120.00325.92
8.1.270.0000.00823.91
8.1.260.0040.00426.35
8.1.250.0000.00728.09
8.1.240.0030.00621.27
8.1.230.0070.00320.26
8.1.220.0090.00017.91
8.1.210.0060.00318.77
8.1.200.0080.00017.13
8.1.190.0030.00517.35
8.1.180.0000.00718.10
8.1.170.0050.00318.54
8.1.160.0000.00822.13
8.1.150.0030.00518.87
8.1.140.0080.00019.52
8.1.130.0030.00317.69
8.1.120.0040.00417.48
8.1.110.0050.00317.42
8.1.100.0000.00817.29
8.1.90.0050.00317.38
8.1.80.0000.00717.29
8.1.70.0000.00817.37
8.1.60.0000.00817.57
8.1.50.0030.00617.48
8.1.40.0000.00817.32
8.1.30.0040.00417.56
8.1.20.0000.00817.40
8.1.10.0040.00417.30
8.1.00.0050.00317.40
8.0.300.0000.00718.77
8.0.290.0070.00016.63
8.0.280.0070.00018.36
8.0.270.0030.00317.21
8.0.260.0030.00317.09
8.0.250.0030.00316.92
8.0.240.0000.00716.77
8.0.230.0080.00016.86
8.0.220.0070.00016.80
8.0.210.0040.00416.84
8.0.200.0000.00716.76
8.0.190.0000.00816.85
8.0.180.0040.00416.77
8.0.170.0000.00716.86
8.0.160.0000.00816.90
8.0.150.0000.00716.77
8.0.140.0070.00016.75
8.0.130.0030.00313.30
8.0.120.0000.00816.77
8.0.110.0030.00516.66
8.0.100.0070.00016.85
8.0.90.0050.00316.72
8.0.80.0030.01016.76
8.0.70.0000.00716.64
8.0.60.0000.00716.68
8.0.50.0000.00716.60
8.0.30.0120.00516.92
8.0.20.0140.00817.40
8.0.10.0030.00516.81
8.0.00.0050.01216.81
7.4.330.0060.00015.08
7.4.320.0050.00216.59
7.4.300.0070.00016.58
7.4.290.0000.00716.48
7.4.280.0030.00616.48
7.4.270.0030.00316.50
7.4.260.0090.00016.60
7.4.250.0000.00716.41
7.4.240.0050.00216.53
7.4.230.0030.00316.60
7.4.220.0110.00716.47
7.4.210.0060.00916.53
7.4.200.0030.00316.42
7.4.160.0090.00616.54
7.4.150.0140.00617.40
7.4.140.0050.01517.86
7.4.130.0100.00816.43
7.4.120.0130.00316.48
7.4.110.0110.00716.38
7.4.100.0120.00616.25
7.4.90.0030.01416.58
7.4.80.0110.00719.39
7.4.70.0030.01316.48
7.4.60.0120.00316.46
7.4.50.0000.00816.37
7.4.40.0040.01216.28
7.4.30.0090.00916.42
7.4.00.0050.01014.81
7.3.330.0000.00513.09
7.3.320.0030.00313.11
7.3.310.0070.00016.12
7.3.300.0030.00316.25
7.3.290.0040.00416.30
7.3.280.0090.00916.25
7.3.270.0080.00817.40
7.3.260.0100.01016.54
7.3.250.0070.01016.32
7.3.240.0110.00616.45
7.3.230.0130.00616.52
7.3.210.0030.01316.39
7.3.200.0140.00316.47
7.3.190.0170.00316.08
7.3.180.0060.01316.30
7.3.170.0090.00916.38
7.3.160.0090.00616.58
7.3.120.0140.00315.07
7.3.110.0030.01414.66
7.3.100.0100.01014.80
7.3.90.0070.01114.75
7.3.80.0070.01015.01
7.3.70.0040.00814.83
7.3.60.0040.01214.90
7.3.50.0120.00014.69
7.3.40.0040.00714.56
7.3.30.0070.00714.76
7.3.20.0070.01016.67
7.3.10.0060.00316.66
7.3.00.0100.00316.67
7.2.330.0110.00716.35
7.2.320.0030.01316.56
7.2.310.0120.00616.48
7.2.300.0100.01116.69
7.2.290.0060.01616.25
7.2.250.0080.01215.13
7.2.240.0120.00614.94
7.2.230.0070.01315.14
7.2.220.0130.00614.89
7.2.210.0030.01214.89
7.2.200.0100.00314.87
7.2.190.0070.00414.91
7.2.180.0040.00714.83
7.2.170.0000.00914.91
7.2.00.0040.01119.43
7.1.330.0000.01315.91
7.1.320.0090.00915.85
7.1.310.0060.00315.92
7.1.300.0050.00515.77
7.1.290.0030.01315.84
7.1.280.0090.00615.55
7.1.270.0060.00615.91
7.1.260.0000.01015.83
7.1.100.0040.00818.22
7.1.70.0050.00317.11
7.1.60.0100.00017.23
7.1.50.0000.01316.95
7.1.00.0030.07722.35
7.0.200.0040.01116.79
7.0.60.0030.05020.04
7.0.50.0000.08717.74
7.0.40.0200.06719.99
7.0.30.0200.04020.09
7.0.20.0100.05020.00
7.0.10.0030.04320.30
7.0.00.0100.08320.09
5.6.280.0070.03321.04
5.6.210.0070.05320.74
5.6.200.0170.06318.12
5.6.190.0030.04320.27
5.6.180.0330.04720.27
5.6.170.0270.04320.49
5.6.160.0070.08320.44
5.6.150.0030.08018.09
5.6.140.0070.05018.21
5.6.130.0070.05318.20
5.6.120.0070.04721.03
5.6.110.0000.05320.88
5.6.100.0070.09021.10
5.6.90.0030.04021.07
5.6.80.0030.08320.43
5.5.350.0330.08020.32
5.5.340.0130.05317.92
5.5.330.0070.03720.57
5.5.320.0200.03720.24
5.5.310.0370.04020.29
5.5.300.0100.04018.02
5.5.290.0100.05717.87
5.5.280.0070.08320.67
5.5.270.0070.03720.88
5.5.260.0170.07720.94
5.5.250.0200.07320.57
5.5.240.0130.05720.14
5.4.450.0330.07319.32
5.4.440.0100.06319.45
5.4.430.0230.07019.45
5.4.420.0230.07019.27
5.4.410.0270.06019.35
5.4.400.0430.06019.20
5.4.390.0330.06018.78
5.4.380.0270.05719.16
5.4.370.0070.07719.00
5.4.360.0300.04719.23
5.4.350.0170.05719.22
5.4.340.0200.06319.08
5.4.320.0230.05318.95
5.4.310.0030.06319.22
5.4.300.0300.06319.32
5.4.290.0300.06719.30
5.4.280.0200.06718.79
5.4.270.0200.05719.08
5.4.260.0370.05718.99
5.4.250.0270.07719.12
5.4.240.0200.05718.98
5.4.230.0170.06319.25
5.4.220.0200.05719.14
5.4.210.0430.06719.30
5.4.200.0500.07018.80
5.4.190.0100.07019.13
5.4.180.0100.06019.14
5.4.170.0530.05718.79
5.4.160.0870.07019.20
5.4.150.0500.06019.06
5.4.140.0600.07716.36
5.4.130.0700.06716.34
5.4.120.0700.06316.36
5.4.110.0770.05316.52
5.4.100.0130.05716.47
5.4.90.0230.05016.29
5.4.80.0130.06016.47
5.4.70.0300.04316.52
5.4.60.0200.07316.28
5.4.50.0130.06016.20
5.4.40.0170.05716.36
5.4.30.0230.05316.46
5.4.20.0200.05316.14
5.4.10.0230.06016.43
5.4.00.0130.07315.87

preferences:
49.85 ms | 401 KiB | 5 Q