3v4l.org

run code in 300+ PHP versions simultaneously
<?php // Return type declaration, // how does it work with nullable declaration // and void / null / nothing returned ... function return_null_or_void_1(): ?string { return null; } function return_null_or_void_2(): ?string { return; } function return_null_or_void_3(): ?string { // return; } var_dump(return_null_or_void_1()).'<br>'; var_dump(return_null_or_void_2()).'<br>'; var_dump(return_null_or_void_3()).'<br>';

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)
8.1.90.0070.00317.24
8.0.160.0030.00516.84
7.4.60.0040.00416.14
7.4.00.0070.00714.67
7.3.120.0080.00814.64
7.3.110.0040.01014.43
7.3.100.0100.00414.59
7.3.90.0070.00914.57
7.3.80.0080.00814.58
7.3.70.0080.01114.47
7.3.60.0090.00914.58
7.3.50.0070.00914.62
7.3.40.0080.01214.60
7.3.30.0080.01114.48
7.3.20.0060.00914.64
7.3.10.0130.00214.57
7.3.00.0060.00915.16
7.2.250.0080.00714.76
7.2.240.0040.01014.72
7.2.230.0080.01114.85
7.2.220.0100.00714.76
7.2.210.0060.01114.64
7.2.200.0050.00914.84
7.2.190.0110.00514.80
7.2.180.0090.00614.76
7.2.170.0090.00814.54
7.2.160.0060.01014.90
7.2.150.0060.01214.87
7.2.140.0030.01514.78
7.2.130.0050.01015.43
7.2.120.0090.00615.96
7.2.110.0140.00616.07
7.2.100.0070.00816.10
7.2.90.0100.00615.88
7.2.80.0060.00716.04
7.2.70.0090.00615.90
7.2.60.0100.00516.17
7.2.50.0100.00715.99
7.2.40.0080.00916.17
7.2.30.0070.01215.91
7.2.20.0140.00715.98
7.2.10.0060.01215.98
7.2.00.0120.00515.92
7.1.330.0150.00513.65
7.1.320.0120.00613.61
7.1.310.0110.00813.58
7.1.300.0140.00713.64
7.1.290.0090.00913.56
7.1.280.0070.01213.48
7.1.270.0130.00513.80
7.1.260.0110.00513.55
7.1.250.0150.00614.95
7.1.240.0110.00713.38
7.1.230.0100.00713.47
7.1.220.0130.00513.43
7.1.210.0130.00513.56
7.1.200.0120.00413.50
7.1.190.0240.00013.42
7.1.180.0130.00813.44
7.1.170.0150.01113.36
7.1.160.0170.00913.54
7.1.150.0220.01013.72
7.1.140.0080.01313.58
7.1.130.0110.01113.75
7.1.120.0080.01313.60
7.1.110.0140.00713.75
7.1.100.0180.00313.23
7.1.90.0210.00313.27
7.1.80.0210.00513.65
7.1.70.0130.00613.50
7.1.60.0160.00313.57
7.1.50.0200.00013.64
7.1.40.0110.01113.70
7.1.30.0150.00513.58
7.1.20.0170.00313.40
7.1.10.0030.01413.53
7.1.00.0080.01113.70
7.0.330.0020.01114.39
7.0.320.0170.00313.18
7.0.310.0060.01113.29
7.0.300.0140.00513.22
7.0.290.0150.00813.25
7.0.280.0150.01213.06
7.0.270.0110.01513.18
7.0.260.0130.00813.06
7.0.250.0160.00513.38
7.0.240.0130.01013.43
7.0.230.0110.01113.32
7.0.220.0090.00912.90
7.0.210.0160.00613.20
7.0.200.0140.01013.07
7.0.190.0120.00613.32
7.0.180.0170.00313.31
7.0.170.0110.00813.41
7.0.160.0150.00513.12
7.0.150.0090.00913.52
7.0.140.0140.00513.07
7.0.130.0130.00413.03
7.0.120.0080.01313.28
7.0.110.0090.01313.01
7.0.100.0130.00713.25
7.0.90.0200.00213.27
7.0.80.0080.01213.13
7.0.70.0110.01113.16
7.0.60.0180.00313.41
7.0.50.0080.01112.88
7.0.40.0130.00713.34
7.0.30.0100.01013.42
7.0.20.0190.00013.23
7.0.10.0090.01313.07
7.0.00.0080.01613.34
5.6.400.0080.00814.09
5.6.390.0080.00713.96
5.6.380.0080.00614.06
5.6.370.0100.01113.83
5.6.360.0160.00913.99
5.6.350.0200.01013.89
5.6.340.0120.01413.96
5.6.330.0170.00313.93
5.6.320.0220.00514.21
5.6.310.0140.00713.93
5.6.300.0090.00914.08
5.6.290.0150.00813.85
5.6.280.0040.01713.86
5.6.270.0180.00614.13
5.6.260.0110.01114.13
5.6.250.0040.01414.00
5.6.240.0140.00714.09
5.6.230.0110.00713.96
5.6.220.0160.01013.98
5.6.210.0190.00413.66
5.6.200.0180.00014.06
5.6.190.0230.00014.00
5.6.180.0160.00614.23
5.6.170.0170.00513.93
5.6.160.0080.00814.03
5.6.150.0110.00713.64
5.6.140.0190.00413.93
5.6.130.0100.01013.67
5.6.120.0150.00314.07
5.6.110.0210.00013.92
5.6.100.0170.00714.09
5.6.90.0090.01013.95
5.6.80.0120.00914.15
5.6.70.0080.01114.04
5.6.60.0100.01013.66
5.6.50.0150.00614.00
5.6.40.0090.00613.98
5.6.30.0060.01513.83
5.6.20.0170.00013.90
5.6.10.0170.00013.86
5.6.00.0150.00913.87
5.5.380.0090.01013.73
5.5.370.0200.00513.61
5.5.360.0140.01013.71
5.5.350.0160.00013.67
5.5.340.0080.01313.46
5.5.330.0190.00013.63
5.5.320.0160.00213.96
5.5.310.0110.01113.87
5.5.300.0170.00313.52
5.5.290.0100.01013.82
5.5.280.0060.01313.73
5.5.270.0100.01113.75
5.5.260.0120.00714.15
5.5.250.0030.01713.95
5.5.240.0100.00713.82
5.5.230.0250.01013.81
5.5.220.0170.00413.62
5.5.210.0120.00613.57
5.5.200.0040.01313.66
5.5.190.0130.00613.89
5.5.180.0090.00913.64
5.5.170.0130.00813.71
5.5.160.0040.01313.82
5.5.150.0200.00514.12
5.5.140.0080.01213.77
5.5.130.0120.00613.94
5.5.120.0090.01413.75
5.5.110.0160.01313.88
5.5.100.0130.00613.86
5.5.90.0170.00713.72
5.5.80.0130.00913.89
5.5.70.0230.00414.06
5.5.60.0120.00714.02
5.5.50.0160.00613.61
5.5.40.0190.01013.52
5.5.30.0180.00313.70
5.5.20.0180.00914.01
5.5.10.0140.00913.72
5.5.00.0260.00013.81
5.4.450.0080.00512.70
5.4.440.0130.00512.70
5.4.430.0100.01012.70
5.4.420.0100.00312.70
5.4.410.0110.00712.70
5.4.400.0080.00512.70
5.4.390.0160.00512.70
5.4.380.0120.00612.70
5.4.370.0080.00812.70
5.4.360.0070.00612.70
5.4.350.0120.00412.70
5.4.340.0110.00412.70
5.4.330.0080.00812.70
5.4.320.0130.00312.70
5.4.310.0130.00312.70
5.4.300.0080.00812.70
5.4.290.0100.00712.70
5.4.280.0170.00312.70
5.4.270.0080.00812.70
5.4.260.0220.00012.70
5.4.250.0110.00412.70
5.4.240.0120.00312.70
5.4.230.0140.00012.70
5.4.220.0080.00812.70
5.4.210.0120.00612.70
5.4.200.0110.00812.70
5.4.190.0050.01312.70
5.4.180.0100.00612.70
5.4.170.0110.00612.70
5.4.160.0100.00212.70
5.4.150.0080.00412.70
5.4.140.0110.00312.70
5.4.130.0070.00912.70
5.4.120.0110.00212.70
5.4.110.0100.00512.70
5.4.100.0080.00612.70
5.4.90.0110.00412.70
5.4.80.0110.00812.70
5.4.70.0090.00612.70
5.4.60.0130.00712.70
5.4.50.0110.00912.70
5.4.40.0160.00012.70
5.4.30.0080.00812.70
5.4.20.0120.00212.70
5.4.10.0060.01012.70
5.4.00.0070.00712.70
5.3.290.0120.00912.70
5.3.280.0120.00312.70
5.3.270.0050.00812.70
5.3.260.0100.00312.70
5.3.250.0080.00512.70
5.3.240.0130.00212.70
5.3.230.0070.00512.70
5.3.220.0100.00512.70
5.3.210.0120.00212.70
5.3.200.0070.00712.70
5.3.190.0120.00612.70
5.3.180.0070.00712.70
5.3.170.0090.00512.70
5.3.160.0130.00512.70
5.3.150.0160.00312.70
5.3.140.0100.00512.70
5.3.130.0150.00012.70
5.3.120.0100.00312.70
5.3.110.0030.01012.70
5.3.100.0070.00712.70
5.3.90.0040.00912.70
5.3.80.0060.00712.70
5.3.70.0070.00612.70
5.3.60.0080.00512.70
5.3.50.0040.00812.70
5.3.40.0160.00512.70
5.3.30.0000.01312.70
5.3.20.0120.00212.70
5.3.10.0130.00412.70
5.3.00.0060.00712.70
5.2.170.0050.00512.70
5.2.160.0100.00212.70
5.2.150.0030.00812.70
5.2.140.0060.00612.70
5.2.130.0060.00612.70
5.2.120.0100.00212.70
5.2.110.0130.00212.70
5.2.100.0120.00012.70
5.2.90.0060.00612.70
5.2.80.0040.00912.70
5.2.70.0120.00212.70
5.2.60.0060.00612.70
5.2.50.0070.00712.70
5.2.40.0130.00012.70
5.2.30.0140.00012.70
5.2.20.0080.00412.70
5.2.10.0090.00212.70
5.2.00.0070.00412.70
5.1.60.0030.00612.70
5.1.50.0030.00912.70
5.1.40.0040.00712.70
5.1.30.0070.00412.70
5.1.20.0060.00612.70
5.1.10.0040.00812.70
5.1.00.0100.00012.70
5.0.50.0080.00012.70
5.0.40.0090.00012.70
5.0.30.0080.00012.70
5.0.20.0050.00512.70
5.0.10.0040.00412.70
5.0.00.0100.00212.70
4.4.90.0060.00312.70
4.4.80.0030.00312.70
4.4.70.0060.00012.70
4.4.60.0080.00012.70
4.4.50.0070.00212.70
4.4.40.0000.01012.70
4.4.30.0050.00512.70
4.4.20.0090.00012.70
4.4.10.0040.00412.70
4.4.00.0040.00412.70
4.3.110.0000.00612.70
4.3.100.0070.00012.70
4.3.90.0000.00612.70
4.3.80.0020.00512.70
4.3.70.0050.00312.70
4.3.60.0090.00012.70
4.3.50.0060.00012.70
4.3.40.0040.00212.70
4.3.30.0060.00012.70
4.3.20.0000.00512.70
4.3.10.0050.00012.70
4.3.00.0000.00512.70

preferences:
147.31 ms | 1394 KiB | 7 Q