3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "apple"; $a = null; //$b never set echo (int) isset($a); echo (int) isset($b); unset($a); echo (int) isset($a);

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)
8.3.40.0120.00318.72
8.3.30.0070.00718.79
8.3.20.0040.00420.25
8.3.10.0000.00823.61
8.3.00.0080.00019.06
8.2.170.0090.00622.96
8.2.160.0030.01020.37
8.2.150.0060.00324.18
8.2.140.0080.00024.66
8.2.130.0000.00826.16
8.2.120.0040.00420.92
8.2.110.0100.00722.10
8.2.100.0060.00617.78
8.2.90.0040.00419.05
8.2.80.0030.00517.97
8.2.70.0070.00317.63
8.2.60.0040.00417.93
8.2.50.0030.00618.07
8.2.40.0040.00419.95
8.2.30.0040.00418.11
8.2.20.0040.00417.72
8.2.10.0050.00317.86
8.2.00.0030.00517.54
8.1.270.0000.00923.83
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0060.00323.91
8.1.230.0040.00819.00
8.1.220.0030.00617.74
8.1.210.0040.00418.77
8.1.200.0060.00317.23
8.1.190.0080.00017.23
8.1.180.0030.00618.89
8.1.170.0050.00318.58
8.1.160.0000.00721.93
8.1.150.0000.00718.55
8.1.140.0000.00717.39
8.1.130.0000.00717.76
8.1.120.0070.00017.40
8.1.110.0000.00717.29
8.1.100.0030.00617.45
8.1.90.0000.00717.33
8.1.80.0040.00417.43
8.1.70.0040.00217.41
8.1.60.0050.00317.58
8.1.50.0040.00417.49
8.1.40.0050.00317.49
8.1.30.0040.00417.50
8.1.20.0000.00917.57
8.1.10.0040.00417.55
8.1.00.0040.00417.43
8.0.300.0060.00318.77
8.0.290.0070.00016.75
8.0.280.0000.00718.33
8.0.270.0040.00417.25
8.0.260.0000.00617.25
8.0.250.0000.00716.89
8.0.240.0030.00316.88
8.0.230.0000.00816.74
8.0.220.0070.00016.72
8.0.210.0030.00316.84
8.0.200.0000.01016.83
8.0.190.0070.00016.84
8.0.180.0050.00316.73
8.0.170.0040.00416.73
8.0.160.0050.00316.93
8.0.150.0000.00716.63
8.0.140.0040.00416.77
8.0.130.0060.00013.20
8.0.120.0060.00316.80
8.0.110.0040.00416.70
8.0.100.0000.00716.68
8.0.90.0040.00416.80
8.0.80.0000.01516.78
8.0.70.0050.00316.69
8.0.60.0050.00216.64
8.0.50.0040.00416.81
8.0.30.0140.00816.87
8.0.20.0120.00917.40
8.0.10.0030.00416.86
8.0.00.0160.00316.86
7.4.330.0000.00615.09
7.4.320.0070.00016.63
7.4.300.0060.00016.64
7.4.290.0030.00316.59
7.4.280.0030.00716.48
7.4.270.0000.00716.49
7.4.260.0030.00616.43
7.4.250.0050.00316.41
7.4.240.0060.00216.57
7.4.230.0000.00716.61
7.4.220.0130.01316.36
7.4.210.0060.00916.69
7.4.200.0000.00716.68
7.4.190.0000.00816.61
7.4.160.0040.01216.57
7.4.150.0100.01417.40
7.4.140.0110.00817.86
7.4.130.0080.00816.46
7.4.120.0080.00816.46
7.4.110.0110.00616.40
7.4.100.0120.00616.46
7.4.90.0100.00716.55
7.4.80.0130.01019.39
7.4.70.0100.00616.43
7.4.60.0130.00316.51
7.4.50.0080.00016.20
7.4.40.0080.00816.49
7.4.30.0120.00416.53
7.4.00.0040.00714.79
7.3.330.0000.00513.17
7.3.320.0000.00812.91
7.3.310.0040.00416.32
7.3.300.0030.00316.16
7.3.290.0030.01016.09
7.3.280.0090.00916.22
7.3.270.0110.00717.40
7.3.260.0160.00816.50
7.3.250.0090.00916.33
7.3.240.0080.01116.56
7.3.230.0070.01016.55
7.3.210.0110.00716.50
7.3.200.0070.01019.39
7.3.190.0030.01616.11
7.3.180.0060.00916.19
7.3.170.0100.01016.27
7.3.160.0130.01016.32
7.3.120.0090.00614.85
7.3.10.0060.00916.63
7.3.00.0070.00816.49
7.2.330.0030.01316.66
7.2.320.0120.00616.52
7.2.310.0110.00516.46
7.2.300.0060.00916.50
7.2.290.0200.00316.61
7.2.130.0070.01016.58
7.2.120.0120.00516.66
7.2.110.0140.00416.52
7.2.100.0050.01216.60
7.2.90.0100.00616.70
7.2.80.0080.00816.63
7.2.70.0050.00916.72
7.2.60.0070.00816.49
7.2.50.0130.00016.61
7.2.40.0040.00916.79
7.2.30.0050.01016.51
7.2.20.0050.00816.70
7.2.10.0060.00716.49
7.2.00.0080.00517.77
7.1.250.0100.00715.63
7.1.200.0000.00915.69
7.1.100.0000.01217.95
7.1.70.0000.00817.25
7.1.60.0100.01319.70
7.1.50.0180.00716.86
7.1.00.0070.07322.36
7.0.200.0130.00614.73
7.0.140.0100.06722.21
7.0.60.0030.04719.93
7.0.50.0070.05717.88
7.0.40.0070.09019.98
7.0.30.0230.06320.16
7.0.20.0230.05720.00
7.0.10.0030.04720.20
7.0.00.0000.04320.32
5.6.280.0030.07321.14
5.6.210.0170.07020.50
5.6.200.0100.08318.15
5.6.190.0030.06020.69
5.6.180.0630.06020.56
5.6.170.0230.05020.50
5.6.160.0000.04320.37
5.6.150.0130.07018.12
5.6.140.0170.07718.07
5.6.130.0030.09018.16
5.6.120.0100.08021.14
5.6.110.0100.08020.98
5.6.100.0000.09020.99
5.6.90.0070.04721.09
5.6.80.0130.07720.36
5.5.350.4270.03720.29
5.5.340.0130.07718.02
5.5.330.0100.06720.44
5.5.320.0170.04320.16
5.5.310.0270.03020.29
5.5.300.0070.05317.91
5.5.290.0130.07017.98
5.5.280.0000.04320.76
5.5.270.0000.06320.87
5.5.260.0100.06320.88
5.5.250.0070.03720.65
5.5.240.0070.07720.25
5.4.450.0300.04319.14
5.4.440.0230.04319.42
5.4.430.0100.04319.38
5.4.420.0330.04319.41
5.4.410.0100.05019.29
5.4.400.0170.04018.81
5.4.390.0300.03319.25
5.4.380.0430.04318.68
5.4.370.0130.05318.58
5.4.360.0330.05018.68
5.4.350.0100.06018.64
5.4.340.0170.05018.56
5.4.320.0050.03812.45
5.4.310.0060.03812.45
5.4.300.0070.05012.45
5.4.290.0090.06112.45
5.4.280.0100.06012.34
5.4.270.0030.04012.35
5.4.260.0100.04112.34
5.4.250.0100.04412.34
5.4.240.0070.03912.35
5.4.230.0100.03912.34
5.4.220.0070.03812.34
5.4.210.0090.03412.34
5.4.200.0050.03912.34
5.4.190.0050.03712.33
5.4.180.0040.03812.34
5.4.170.0050.03612.34
5.4.160.0090.03212.34
5.4.150.0050.03912.34
5.4.140.0040.04012.02
5.4.130.0040.04012.01
5.4.120.0070.03611.96
5.4.110.0070.03411.96
5.4.100.0060.03511.96
5.4.90.0060.03811.96
5.4.80.0060.03711.96
5.4.70.0080.03811.96
5.4.60.0060.03511.96
5.4.50.0040.03711.96
5.4.40.0100.03311.95
5.4.30.0060.03811.95
5.4.20.0050.04811.95
5.4.10.0050.03811.95
5.4.00.0080.03611.43
5.3.290.0060.03912.80
5.3.280.0030.04912.71
5.3.270.0080.05312.72
5.3.260.0120.04812.72
5.3.250.0060.04012.71
5.3.240.0090.03812.72
5.3.230.0090.03612.71
5.3.220.0060.03712.68
5.3.210.0060.04012.68
5.3.200.0080.03512.68
5.3.190.0060.03912.68
5.3.180.0040.03912.68
5.3.170.0090.03412.67
5.3.160.0060.03812.67
5.3.150.0070.03812.68
5.3.140.0070.03612.66
5.3.130.0080.03712.66
5.3.120.0040.04712.65
5.3.110.0040.04112.66
5.3.100.0050.03812.12
5.3.90.0060.03612.08
5.3.80.0060.03612.08
5.3.70.0040.04012.07
5.3.60.0070.03612.07
5.3.50.0120.03812.00
5.3.40.0100.04712.00
5.3.30.0130.04111.94
5.3.20.0080.04711.72
5.3.10.0090.05311.69
5.3.00.0100.04411.67
5.2.170.0050.0309.18
5.2.160.0010.0349.18
5.2.150.0050.0319.18
5.2.140.0020.0339.18
5.2.130.0030.0329.14
5.2.120.0080.0319.13
5.2.110.0060.0409.14
5.2.100.0060.0309.13
5.2.90.0030.0359.14
5.2.80.0050.0329.13
5.2.70.0060.0329.13
5.2.60.0040.0339.09
5.2.50.0090.0299.05
5.2.40.0070.0309.03
5.2.30.0100.0489.00
5.2.20.0050.0369.00
5.2.10.0070.0338.93
5.2.00.0090.0278.79
5.1.60.0050.0258.08
5.1.50.0030.0288.07
5.1.40.0060.0238.05
5.1.30.0040.0278.41
5.1.20.0040.0278.42
5.1.10.0060.0258.15
5.1.00.0020.0288.15
5.0.50.0030.0226.63
5.0.40.0050.0216.49
5.0.30.0090.0346.30
5.0.20.0050.0196.26
5.0.10.0040.0346.24
5.0.00.0050.0356.23
4.4.90.0030.0164.78
4.4.80.0020.0164.75
4.4.70.0000.0184.76
4.4.60.0030.0164.76
4.4.50.0020.0174.77
4.4.40.0040.0254.71
4.4.30.0060.0194.76
4.4.20.0070.0194.85
4.4.10.0030.0234.85
4.4.00.0030.0294.76
4.3.110.0020.0184.67
4.3.100.0020.0164.67
4.3.90.0020.0154.64
4.3.80.0020.0244.58
4.3.70.0030.0144.63
4.3.60.0020.0224.63
4.3.50.0050.0134.63
4.3.40.0030.0234.54
4.3.30.0020.0163.29
4.3.20.0020.0163.27
4.3.10.0020.0163.23
4.3.00.0100.01716.99

preferences:
43.27 ms | 400 KiB | 5 Q