3v4l.org

run code in 300+ PHP versions simultaneously
<?php $nullvar = null; $nullstr = ''; $notnull = 'foo'; $unset = 'something'; unset($unset); $results = array( '<h1>Results</h1>' , '<br/>$nullvar = ' , var_dump(isset($nullvar), true) , '<br/> $nullstr = ' , var_dump(isset($nullstr), true) , '<br/>$notnull = ' , var_dump(isset($notnull), true) , '<br/>$unset = ' , var_dump(isset($unset), true) ); echo impode(' ',$results);

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)
8.3.60.0130.00616.50
8.3.50.0100.01322.05
8.3.40.0110.00718.88
8.3.30.0120.00418.91
8.3.20.0000.00820.13
8.3.10.0050.00323.59
8.3.00.0120.00019.38
8.2.180.0060.00918.29
8.2.170.0180.00322.96
8.2.160.0100.00720.55
8.2.150.0030.00624.18
8.2.140.0000.00724.66
8.2.130.0050.00326.16
8.2.120.0030.00622.27
8.2.110.0080.00022.10
8.2.100.0090.00317.91
8.2.90.0000.00918.92
8.2.80.0000.00817.97
8.2.70.0000.00917.50
8.2.60.0050.00317.93
8.2.50.0060.00318.07
8.2.40.0040.00418.22
8.2.30.0020.00517.95
8.2.20.0080.00017.69
8.2.10.0040.00418.14
8.2.00.0000.00817.88
8.1.280.0110.00625.92
8.1.270.0080.00024.02
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0090.00023.88
8.1.230.0030.00919.19
8.1.220.0000.00817.74
8.1.210.0000.00818.77
8.1.200.0030.00617.35
8.1.190.0000.00917.29
8.1.180.0060.00318.10
8.1.170.0000.00818.59
8.1.160.0030.00521.94
8.1.150.0040.00418.57
8.1.140.0000.00717.34
8.1.130.0080.00017.76
8.1.120.0040.00417.51
8.1.110.0070.00017.49
8.1.100.0040.00317.49
8.1.90.0000.00717.46
8.1.80.0000.00917.49
8.1.70.0000.00717.39
8.1.60.0040.00417.63
8.1.50.0050.00317.47
8.1.40.0000.00817.50
8.1.30.0000.00817.60
8.1.20.0080.00017.59
8.1.10.0030.00617.46
8.1.00.0040.00417.38
8.0.300.0050.00218.77
8.0.290.0000.00817.05
8.0.280.0000.00718.48
8.0.270.0030.00317.23
8.0.260.0030.00316.90
8.0.250.0000.00716.93
8.0.240.0070.00016.95
8.0.230.0030.00317.06
8.0.220.0040.00417.03
8.0.210.0050.00217.01
8.0.200.0050.00216.95
8.0.190.0030.00516.93
8.0.180.0070.00017.03
8.0.170.0040.00417.02
8.0.160.0030.00416.85
8.0.150.0070.00017.04
8.0.140.0000.00716.95
8.0.130.0030.00313.37
8.0.120.0030.00517.02
8.0.110.0070.00016.95
8.0.100.0080.00016.98
8.0.90.0070.00016.96
8.0.80.0030.01016.89
8.0.70.0040.00416.92
8.0.60.0040.00417.09
8.0.50.0000.00716.92
8.0.30.0140.00417.33
8.0.20.0110.00817.40
8.0.10.0030.00516.98
8.0.00.0110.00616.80
7.4.330.0050.00015.20
7.4.320.0000.00716.54
7.4.300.0060.00016.62
7.4.290.0000.00716.64
7.4.280.0030.00316.51
7.4.270.0000.00716.59
7.4.260.0000.00716.49
7.4.250.0030.00516.57
7.4.240.0020.00616.54
7.4.230.0000.00616.60
7.4.220.0070.01016.64
7.4.210.0070.00716.58
7.4.200.0040.00416.59
7.4.190.0080.00016.75
7.4.160.0150.00016.67
7.4.150.0090.00917.40
7.4.140.0080.01217.86
7.4.130.0130.00416.53
7.4.120.0120.00816.71
7.4.110.0120.00616.50
7.4.100.0040.01316.67
7.4.90.0040.01616.42
7.4.80.0070.01019.39
7.4.70.0080.00816.64
7.4.60.0000.02216.51
7.4.50.0000.00916.38
7.4.40.0100.00322.77
7.4.30.0030.01416.67
7.4.00.0040.01115.03
7.3.330.0030.00313.15
7.3.320.0060.00013.21
7.3.310.0000.00716.34
7.3.300.0030.00316.24
7.3.290.0060.01016.29
7.3.280.0140.00716.31
7.3.270.0100.00717.40
7.3.260.0110.00716.61
7.3.250.0110.01016.39
7.3.240.0120.00616.48
7.3.230.0140.00316.41
7.3.210.0070.01016.60
7.3.200.0100.00719.39
7.3.190.0100.00716.48
7.3.180.0030.01316.43
7.3.170.0110.01116.53
7.3.160.0090.00916.39
7.3.120.0080.00614.99
7.2.330.0150.00316.67
7.2.320.0170.00016.53
7.2.310.0100.00716.51
7.2.300.0080.00816.57
7.2.290.0110.00716.75
7.2.80.0030.00916.46
7.2.60.0080.00016.74
7.1.200.0040.01115.77
7.1.70.0070.00317.09
7.1.60.0110.01119.33
7.1.50.0130.00716.87
7.1.00.0070.07022.24
7.0.200.0030.00516.55
7.0.140.0070.07022.10
7.0.60.0070.03720.04
7.0.50.0030.08717.86
7.0.40.0070.08720.42
7.0.30.0530.06720.13
7.0.20.0270.05020.17
7.0.10.0000.05020.33
7.0.00.0030.07020.04
5.6.280.0100.06321.09
5.6.210.0030.04020.76
5.6.200.0070.06318.15
5.6.190.0130.06320.77
5.6.180.3100.04720.77
5.6.170.0270.08020.48
5.6.160.0100.05320.43
5.6.150.0070.08318.18
5.6.140.0030.05318.22
5.6.130.0100.08318.18
5.6.120.0070.05721.00
5.6.110.0130.07320.99
5.6.100.0130.07320.97
5.6.90.0130.07721.01
5.6.80.0100.08720.36
5.6.70.3630.03320.39
5.5.350.0300.07320.45
5.5.340.0070.03317.91
5.5.330.0130.07720.25
5.5.320.0400.06720.18
5.5.310.0200.07020.18
5.5.300.0070.08717.97
5.5.290.0030.05318.00
5.5.280.0030.05320.64
5.5.270.0130.06320.86
5.5.260.0030.07720.72
5.5.250.0170.07020.61
5.5.240.0170.07020.26
5.4.450.0030.06319.49
5.4.440.0670.06319.52
5.4.430.0170.05019.18
5.4.420.0170.06319.14
5.4.410.0200.05719.54
5.4.400.0400.03319.11
5.4.390.0200.05319.28
5.4.380.0400.03718.78
5.4.370.0300.04718.49
5.4.360.0400.05718.50
5.4.350.0230.07318.50
5.4.340.0130.06718.71
5.4.320.0090.03312.46
5.4.310.0070.05312.45
5.4.300.0060.03712.46
5.4.290.0090.03912.45
5.4.280.0060.03912.35
5.4.270.0050.03712.35
5.4.260.0040.03912.35
5.4.250.0130.03212.35
5.4.240.0100.03212.35
5.4.230.0030.03912.34
5.4.220.0070.03812.34
5.4.210.0050.04112.34
5.4.200.0060.03712.34
5.4.190.0140.04512.34
5.4.180.0160.04312.34
5.4.170.0140.04412.35
5.4.160.0400.08312.34
5.4.150.0190.04212.34
5.4.140.0120.04612.02
5.4.130.0190.03912.01
5.4.120.0170.04011.97
5.4.110.0130.04411.96
5.4.100.0170.04211.96
5.4.90.0160.04411.96
5.4.80.0150.04511.96
5.4.70.0140.04311.96
5.4.60.0220.06511.96
5.4.50.0230.03411.96
5.4.40.0120.04611.95
5.4.30.0160.04511.95
5.4.20.0180.04311.94
5.4.10.0150.04511.95
5.4.00.0200.06911.43
5.3.290.0080.04112.80
5.3.280.0070.04212.71
5.3.270.0150.04712.72
5.3.260.0140.04712.72
5.3.250.0180.07412.72
5.3.240.0320.09412.72
5.3.230.0130.05112.71
5.3.220.0180.04612.68
5.3.210.0130.04712.68
5.3.200.0200.04112.68
5.3.190.0240.04012.68
5.3.180.0160.04512.68
5.3.170.0110.05112.67
5.3.160.0140.04812.67
5.3.150.0160.04712.67
5.3.140.0280.06412.66
5.3.130.0200.04212.66
5.3.120.0200.04112.66
5.3.110.0090.05112.65
5.3.100.0210.07112.12
5.3.90.0140.04512.08
5.3.80.0150.04512.07
5.3.70.0190.04112.07
5.3.60.0130.04612.06
5.3.50.0190.04212.00
5.3.40.0160.04512.00
5.3.30.0160.04311.96
5.3.20.0160.04311.73
5.3.10.0200.06511.69
5.3.00.0160.04011.68
5.2.170.0170.0329.18
5.2.160.0190.0319.18
5.2.150.0200.0459.18
5.2.140.0120.0379.18
5.2.130.0130.0369.14
5.2.120.0190.0309.14
5.2.110.0150.0349.15
5.2.100.0180.0299.14
5.2.90.0110.0359.14
5.2.80.0120.0369.13
5.2.70.0160.0319.14
5.2.60.0160.0319.09
5.2.50.0170.0319.06
5.2.40.0090.0399.04
5.2.30.0110.0379.01
5.2.20.0170.0319.00
5.2.10.0120.0358.93
5.2.00.0130.0348.78
5.1.60.0130.0288.07
5.1.50.0140.0598.07
5.1.40.0100.0378.05
5.1.30.0110.0338.39
5.1.20.0110.0328.43
5.1.10.0290.0468.14
5.1.00.0110.0328.14
5.0.50.0110.0236.63
5.0.40.0060.0266.48
5.0.30.0070.0386.29
5.0.20.0060.0256.27
5.0.10.0080.0236.24
5.0.00.0080.0366.24
4.4.90.0070.0184.78
4.4.80.0050.0194.75
4.4.70.0060.0194.75
4.4.60.0080.0174.76
4.4.50.0110.0184.77
4.4.40.0140.0524.71
4.4.30.0080.0204.76
4.4.20.0060.0214.84
4.4.10.0050.0214.85
4.4.00.0060.0314.76
4.3.110.0050.0204.66
4.3.100.0100.0184.67
4.3.90.0060.0204.63
4.3.80.0200.0514.58
4.3.70.0100.0174.63
4.3.60.0070.0184.63
4.3.50.0060.0184.63
4.3.40.0050.0334.54
4.3.30.0060.0193.29
4.3.20.0060.0183.27
4.3.10.0050.0183.24
4.3.00.0000.0237.78

preferences:
36.95 ms | 401 KiB | 5 Q