3v4l.org

run code in 300+ PHP versions simultaneously
<?php $exists = isset($a); echo $exists ? TRUE : 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)
8.3.40.0110.00718.70
8.3.30.0110.00718.97
8.3.20.0080.00019.98
8.3.10.0040.00420.58
8.3.00.0000.01017.59
8.2.170.0040.01122.96
8.2.160.0000.01720.52
8.2.150.0040.00424.18
8.2.140.0090.00024.66
8.2.130.0070.00026.16
8.2.120.0020.00522.24
8.2.110.0080.00320.93
8.2.100.0080.00418.22
8.2.90.0040.00419.22
8.2.80.0080.00017.97
8.2.70.0030.00617.50
8.2.60.0110.00017.93
8.2.50.0040.00418.07
8.2.40.0030.00518.19
8.2.30.0040.00419.43
8.2.20.0080.00017.66
8.2.10.0040.00417.97
8.2.00.0040.00417.59
8.1.270.0040.00423.82
8.1.260.0070.00026.35
8.1.250.0070.00028.09
8.1.240.0000.00921.27
8.1.230.0040.00819.55
8.1.220.0050.00317.74
8.1.210.0030.00518.77
8.1.200.0030.00617.23
8.1.190.0040.00417.22
8.1.180.0000.00718.10
8.1.170.0040.00418.51
8.1.160.0000.00721.91
8.1.150.0000.00718.85
8.1.140.0000.00817.41
8.1.130.0000.00717.73
8.1.120.0040.00417.26
8.1.110.0000.00817.38
8.1.100.0030.00317.41
8.1.90.0000.00717.37
8.1.80.0030.00417.33
8.1.70.0040.00417.27
8.1.60.0080.00017.43
8.1.50.0090.00017.48
8.1.40.0040.00417.46
8.1.30.0000.00817.55
8.1.20.0000.00817.54
8.1.10.0000.00817.52
8.1.00.0040.00417.45
8.0.300.0040.00418.77
8.0.290.0030.00616.63
8.0.280.0030.00318.35
8.0.270.0030.00317.11
8.0.260.0030.00317.28
8.0.250.0030.00317.01
8.0.240.0050.00316.84
8.0.230.0030.00316.74
8.0.220.0030.00316.84
8.0.210.0000.00616.77
8.0.200.0000.00716.77
8.0.190.0110.00016.84
8.0.180.0030.00316.79
8.0.170.0040.00416.76
8.0.160.0040.00416.75
8.0.150.0000.00716.81
8.0.140.0070.00016.69
8.0.130.0000.00613.20
8.0.120.0040.00416.81
8.0.110.0080.00016.72
8.0.100.0000.00716.68
8.0.90.0070.00016.86
8.0.80.0080.00816.84
8.0.70.0040.00416.80
8.0.60.0040.00416.87
8.0.50.0070.00016.77
8.0.30.0090.01017.22
8.0.20.0100.00817.40
8.0.10.0030.00316.90
8.0.00.0100.01016.79
7.4.330.0000.00515.00
7.4.320.0000.00616.57
7.4.300.0030.00316.49
7.4.290.0040.00416.48
7.4.280.0080.00016.32
7.4.270.0040.00416.33
7.4.260.0030.00316.50
7.4.250.0070.00016.28
7.4.240.0020.00516.50
7.4.230.0070.00016.24
7.4.220.0120.01216.44
7.4.210.0120.00616.30
7.4.200.0070.00016.33
7.4.160.0110.00416.27
7.4.150.0140.00317.40
7.4.140.0150.00517.86
7.4.130.0050.01116.36
7.4.120.0050.01116.34
7.4.110.0120.00916.36
7.4.100.0060.01416.59
7.4.90.0140.00316.32
7.4.80.0040.01919.39
7.4.70.0070.01116.36
7.4.60.0120.00416.46
7.4.50.0040.00416.58
7.4.40.0060.01016.46
7.4.30.0030.01316.48
7.4.00.0030.00614.95
7.3.330.0060.00012.87
7.3.320.0000.00512.98
7.3.310.0000.00815.96
7.3.300.0030.00315.98
7.3.290.0060.01016.18
7.3.280.0080.00816.17
7.3.270.0060.01317.40
7.3.260.0070.01016.34
7.3.250.0060.01116.38
7.3.240.0120.00916.21
7.3.230.0120.00416.39
7.3.210.0130.00316.32
7.3.200.0160.00719.39
7.3.190.0130.00916.30
7.3.180.0000.01516.32
7.3.170.0120.00916.27
7.3.160.0030.01216.17
7.3.10.0130.00316.50
7.3.00.0100.01016.28
7.2.330.0120.00616.49
7.2.320.0070.01016.52
7.2.310.0030.01316.60
7.2.300.0100.00716.34
7.2.290.0120.00616.45
7.2.130.0170.00016.46
7.2.120.0070.00716.15
7.2.110.0100.00616.00
7.2.100.0100.01316.14
7.2.90.0150.00316.37
7.2.80.0100.01016.31
7.2.70.0260.00016.57
7.2.60.0150.00416.72
7.2.50.0190.01116.20
7.2.40.0150.00716.05
7.2.30.0110.01416.50
7.2.20.0100.01316.16
7.2.10.0110.00715.85
7.2.00.0130.00517.82
7.1.250.0090.00615.08
7.1.100.0180.00018.05
7.1.70.0090.00016.69
7.1.60.0070.01719.61
7.1.50.0100.00716.93
7.1.00.0070.07022.51
7.0.200.0060.01016.78
7.0.140.0070.07022.00
7.0.60.0070.03719.91
7.0.50.0100.04317.84
7.0.40.0030.06020.09
7.0.30.0330.08020.02
7.0.20.0300.06720.02
7.0.10.0070.05720.14
7.0.00.0100.08020.19
5.6.280.0070.07020.81
5.6.210.0130.08020.51
5.6.200.0100.08018.22
5.6.190.0070.05020.57
5.6.180.0130.04020.41
5.6.170.0230.04720.40
5.6.160.0070.09020.32
5.6.150.0070.05718.18
5.6.140.0070.08018.21
5.6.130.0070.06718.25
5.6.120.0130.07321.09
5.6.110.0100.07021.02
5.6.100.0000.09021.10
5.6.90.0030.04021.09
5.6.80.0070.07020.50
5.6.70.0200.06720.51
5.5.350.0030.07320.32
5.5.340.0100.07718.00
5.5.330.0170.06020.19
5.5.320.0330.07720.17
5.5.310.0230.04320.20
5.5.300.0100.07317.95
5.5.290.0030.04017.89
5.5.280.0030.05320.88
5.5.270.0000.09020.61
5.5.260.0200.07720.67
5.5.250.0100.06720.61
5.5.240.0070.07020.13
5.4.450.0300.05019.10
5.4.440.0230.05719.45
5.4.430.0070.06019.27
5.4.420.0100.06019.48
5.4.410.0970.07019.51
5.4.400.0170.05319.00
5.4.390.0730.05319.26
5.4.380.0370.05018.52
5.4.370.0400.05318.71
5.4.360.0430.04718.52
5.4.350.0300.06018.74
5.4.340.0300.05718.49
5.4.320.0060.03712.45
5.4.310.0090.05012.45
5.4.300.0090.03512.45
5.4.290.0070.03712.45
5.4.280.0030.03912.34
5.4.270.0040.03912.35
5.4.260.0060.03812.34
5.4.250.0050.03812.35
5.4.240.0050.03612.35
5.4.230.0050.03912.34
5.4.220.0050.03712.34
5.4.210.0050.03612.34
5.4.200.0080.03512.34
5.4.190.0100.03212.34
5.4.180.0070.03612.34
5.4.170.0060.03612.35
5.4.160.0080.03412.34
5.4.150.0050.03712.34
5.4.140.0050.03812.02
5.4.130.0090.03212.01
5.4.120.0070.03411.96
5.4.110.0080.03911.96
5.4.100.0080.03611.96
5.4.90.0040.03911.96
5.4.80.0080.03711.96
5.4.70.0080.04611.96
5.4.60.0060.03511.96
5.4.50.0040.03711.96
5.4.40.0070.04011.95
5.4.30.0070.03511.95
5.4.20.0090.03311.95
5.4.10.0060.03411.94
5.4.00.0060.03611.43
5.3.290.0060.04012.80
5.3.280.0070.03712.71
5.3.270.0080.03912.72
5.3.260.0060.04412.72
5.3.250.0090.03412.72
5.3.240.0060.03812.72
5.3.230.0060.03812.71
5.3.220.0020.04112.68
5.3.210.0050.04312.68
5.3.200.0050.03712.68
5.3.190.0050.04112.68
5.3.180.0070.03812.67
5.3.170.0050.03912.67
5.3.160.0060.03612.67
5.3.150.0040.03812.67
5.3.140.0060.03512.66
5.3.130.0070.04412.66
5.3.120.0080.03612.66
5.3.110.0060.03812.66
5.3.100.0100.04012.12
5.3.90.0070.03512.08
5.3.80.0060.03512.07
5.3.70.0080.03412.08
5.3.60.0070.03412.07
5.3.50.0060.03712.00
5.3.40.0040.03812.00
5.3.30.0040.03711.94
5.3.20.0060.03511.71
5.3.10.0080.03311.69
5.3.00.0060.03511.67
5.2.170.0040.0329.18
5.2.160.0060.0299.18
5.2.150.0030.0319.18
5.2.140.0080.0279.17
5.2.130.0070.0269.13
5.2.120.0050.0289.13
5.2.110.0040.0309.14
5.2.100.0050.0279.13
5.2.90.0050.0289.14
5.2.80.0030.0319.13
5.2.70.0010.0339.13
5.2.60.0050.0299.09
5.2.50.0050.0299.05
5.2.40.0040.0329.03
5.2.30.0050.0309.00
5.2.20.0040.0349.00
5.2.10.0050.0298.91
5.2.00.0060.0278.77
5.1.60.0060.0218.06
5.1.50.0060.0238.06
5.1.40.0050.0248.04
5.1.30.0030.0278.39
5.1.20.0060.0258.41
5.1.10.0030.0288.13
5.1.00.0050.0258.14
5.0.50.0060.0196.61
5.0.40.0030.0216.47
5.0.30.0040.0316.28
5.0.20.0010.0216.26
5.0.10.0040.0186.23
5.0.00.0040.0306.22
4.4.90.0030.0154.78
4.4.80.0030.0154.76
4.4.70.0010.0174.75
4.4.60.0050.0134.76
4.4.50.0030.0154.77
4.4.40.0020.0264.71
4.4.30.0030.0154.76
4.4.20.0030.0154.84
4.4.10.0020.0164.85
4.4.00.0000.0274.76
4.3.110.0040.0144.67
4.3.100.0050.0124.66
4.3.90.0020.0154.64
4.3.80.0020.0244.58
4.3.70.0020.0154.63
4.3.60.0050.0124.63
4.3.50.0030.0154.62
4.3.40.0030.0244.54
4.3.30.0020.0163.28
4.3.20.0020.0163.26
4.3.10.0030.0153.21
4.3.00.0030.0207.39

preferences:
35.47 ms | 400 KiB | 5 Q