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)
8.3.80.0290.01130.84
8.3.70.0300.01030.84
8.3.60.0280.01630.84
8.3.50.0090.00930.84
8.3.40.0350.00330.84
8.3.30.0270.01230.84
8.3.20.0270.01230.84
8.3.10.0320.00730.84
8.3.00.0240.01430.84
8.2.200.0360.00330.84
8.2.190.0340.00730.84
8.2.180.0310.00930.84
8.2.170.0410.00330.84
8.2.160.0380.01030.84
8.2.150.0460.00330.84
8.2.140.0390.00830.84
8.2.130.0240.01030.84
8.2.120.0330.01730.84
8.2.110.0300.00830.84
8.2.100.0210.00630.84
8.2.90.0140.00630.84
8.2.80.0270.00730.84
8.2.70.0200.00630.84
8.2.60.0200.00530.84
8.2.50.0310.01530.84
8.2.40.0340.01130.84
8.2.30.0320.01130.84
8.2.20.0250.00730.84
8.2.10.0220.01130.84
8.2.00.0220.00930.84
8.1.290.0260.01330.84
8.1.280.0200.01122.15
8.1.270.0310.00730.84
8.1.260.0290.00730.84
8.1.250.0290.00630.84
8.1.240.0190.00430.84
8.1.230.0300.00430.84
8.1.220.0270.01030.84
8.1.210.0300.00730.84
8.1.200.0290.01330.84
8.1.190.0310.00830.84
8.1.180.0290.00930.84
8.1.170.0270.01030.84
8.1.160.0270.00430.84
8.1.150.0300.00730.84
8.1.140.0340.00730.84
8.1.130.0210.01730.84
8.1.120.0190.01230.84
8.1.110.0270.00630.84
8.1.100.0260.01130.84
8.1.90.0140.00521.77
8.1.80.0400.00430.84
8.1.70.0480.00030.84
8.1.60.0350.01030.84
8.1.50.0340.00830.84
8.1.40.0340.00730.84
8.1.30.0320.00930.84
8.1.20.0340.00730.84
8.1.10.0390.00430.84
8.1.00.0380.00730.84
8.0.300.0330.00330.84
8.0.290.0130.00718.06
8.0.280.0270.01130.84
8.0.270.0300.00930.84
8.0.260.0250.00830.84
8.0.250.0320.00730.84
8.0.240.0210.01830.84
8.0.230.0210.01830.84
8.0.220.0420.00030.84
8.0.210.0090.00930.84
8.0.200.0120.00430.84
8.0.190.0140.00330.84
8.0.180.0150.00330.84
8.0.170.0130.00330.84
8.0.160.0070.00421.51
8.0.150.0250.00430.84
8.0.140.0180.00030.84
8.0.130.0090.00930.84
8.0.120.0110.00530.84
8.0.110.0310.00430.84
8.0.100.0160.00330.84
8.0.90.0160.00030.84
8.0.80.0240.00930.84
8.0.70.0330.00930.84
8.0.60.0260.00930.84
8.0.50.0310.00430.84
8.0.30.0320.00330.84
8.0.20.0290.00330.84
8.0.10.0230.00830.84
8.0.00.0250.01130.84
7.4.330.0290.00930.84
7.4.320.0220.01330.84
7.4.300.0270.00830.84
7.4.290.0310.00030.84
7.4.280.0300.00430.84
7.4.270.0320.00430.84
7.4.260.0320.00630.84
7.4.250.0380.00430.84
7.4.240.0260.01030.84
7.4.230.0240.01030.84
7.4.220.0260.00730.84
7.4.210.0220.01130.84
7.4.200.0260.00830.84
7.4.190.0210.00530.84
7.4.180.0270.00730.84
7.4.160.0220.01230.84
7.4.150.0270.00630.84
7.4.140.0290.00630.84
7.4.130.0260.00730.84
7.4.120.0250.00830.84
7.4.110.0210.00330.84
7.4.100.0330.00330.84
7.4.90.0480.00330.84
7.4.80.0300.00630.84
7.4.70.0240.00930.84
7.4.60.0110.00521.04
7.4.50.0230.01030.84
7.4.40.0220.01130.84
7.4.30.0260.00930.84
7.4.20.0280.00730.84
7.4.10.0250.01030.84
7.4.00.0120.00520.06
7.3.330.0250.00630.84
7.3.320.0320.00430.84
7.3.310.0310.00530.84
7.3.300.0290.00330.84
7.3.290.0350.00430.84
7.3.280.0340.00430.84
7.3.270.0280.00930.84
7.3.260.0280.00330.84
7.3.250.0220.00930.84
7.3.240.0270.00530.84
7.3.230.0260.00030.84
7.3.220.0070.00930.84
7.3.210.0200.00730.84
7.3.200.0280.00030.84
7.3.190.0280.00630.84
7.3.180.0340.00030.84
7.3.170.0280.00630.84
7.3.160.0300.00430.84
7.3.150.0260.00830.84
7.3.140.0330.00030.84
7.3.130.0410.00030.84
7.3.120.0160.00720.04
7.3.110.0100.00819.90
7.3.100.0120.00320.01
7.3.90.0120.00819.99
7.3.80.0160.00520.00
7.3.70.0130.01019.92
7.3.60.0130.00920.00
7.3.50.0120.00920.03
7.3.40.0140.01120.01
7.3.30.0140.00819.93
7.3.20.0120.00720.04
7.3.10.0130.00619.99
7.3.00.0110.00819.08
7.2.340.0300.00630.84
7.2.330.0350.00730.84
7.2.320.0350.00330.84
7.2.310.0250.00730.84
7.2.300.0280.00630.84
7.2.290.0330.00030.84
7.2.280.0260.00930.84
7.2.270.0220.01430.84
7.2.260.0280.00730.84
7.2.250.0140.00820.12
7.2.240.0110.01020.09
7.2.230.0150.00920.18
7.2.220.0150.00820.12
7.2.210.0130.01020.04
7.2.200.0150.00620.17
7.2.190.0170.00520.14
7.2.180.0160.00520.12
7.2.170.0150.00919.97
7.2.160.0150.00920.21
7.2.150.0160.01020.19
7.2.140.0080.01220.13
7.2.130.0060.00819.28
7.2.120.0100.00719.68
7.2.110.0140.00619.76
7.2.100.0110.00719.78
7.2.90.0150.00619.62
7.2.80.0140.00619.74
7.2.70.0170.00419.63
7.2.60.0140.00619.83
7.2.50.0130.00819.70
7.2.40.0140.00919.84
7.2.30.0120.01119.64
7.2.20.0200.00619.69
7.2.10.0120.01019.69
7.2.00.0180.00519.65
7.1.330.0200.00319.38
7.1.320.0150.00719.35
7.1.310.0170.00619.33
7.1.300.0180.00519.37
7.1.290.0210.00819.32
7.1.280.0120.01019.27
7.1.270.0200.00519.48
7.1.260.0140.00719.31
7.1.250.0170.00518.92
7.1.240.0140.00722.11
7.1.230.0170.00522.15
7.1.220.0200.00622.13
7.1.210.0220.00322.20
7.1.200.0190.00522.17
7.1.190.0280.00222.13
7.1.180.0240.00722.14
7.1.170.0210.00722.10
7.1.160.0210.00822.19
7.1.150.0200.01022.28
7.1.140.0180.00822.21
7.1.130.0190.00822.29
7.1.120.0190.00622.22
7.1.110.0180.00522.29
7.1.100.0230.00122.03
7.1.90.0220.00522.05
7.1.80.0230.00622.24
7.1.70.0140.01122.17
7.1.60.0230.00222.20
7.1.50.0250.00022.24
7.1.40.0220.00722.27
7.1.30.0200.00622.21
7.1.20.0200.00622.12
7.1.10.0150.00922.18
7.1.00.0160.00922.27
7.0.330.0070.01018.50
7.0.320.0180.00322.01
7.0.310.0160.00822.06
7.0.300.0210.00422.03
7.0.290.0190.00622.04
7.0.280.0150.01121.95
7.0.270.0140.01422.01
7.0.260.0250.00421.95
7.0.250.0230.00322.11
7.0.240.0190.00622.13
7.0.230.0180.00722.08
7.0.220.0150.00821.87
7.0.210.0210.00522.02
7.0.200.0200.00721.95
7.0.190.0180.00722.08
7.0.180.0190.00322.07
7.0.170.0140.00722.13
7.0.160.0160.00621.98
7.0.150.0180.00622.18
7.0.140.0170.00821.95
7.0.130.0180.00521.93
7.0.120.0140.00822.06
7.0.110.0170.00821.92
7.0.100.0180.00722.04
7.0.90.0200.00322.05
7.0.80.0160.00621.98
7.0.70.0190.00522.00
7.0.60.0260.00122.12
7.0.50.0170.00721.86
7.0.40.0180.00722.09
7.0.30.0160.00822.13
7.0.20.0220.00222.03
7.0.10.0170.00821.96
7.0.00.0180.00822.09
5.6.400.0160.00619.67
5.6.390.0160.00619.59
5.6.380.0140.00418.25
5.6.370.0190.00722.33
5.6.360.0190.00922.41
5.6.350.0250.00522.36
5.6.340.0190.00922.40
5.6.330.0220.00322.38
5.6.320.0230.00522.52
5.6.310.0220.00322.38
5.6.300.0150.00922.46
5.6.290.0210.00622.34
5.6.280.0140.01122.35
5.6.270.0180.00922.48
5.6.260.0170.00522.48
5.6.250.0130.01022.42
5.6.240.0150.00522.46
5.6.230.0120.00422.40
5.6.220.0180.01022.41
5.6.210.0190.00722.25
5.6.200.0220.00222.45
5.6.190.0230.00422.42
5.6.180.0220.00522.54
5.6.170.0180.01022.38
5.6.160.0120.01222.43
5.6.150.0170.00622.24
5.6.140.0170.00922.38
5.6.130.0120.00822.25
5.6.120.0160.00522.45
5.6.110.0210.00522.38
5.6.100.0170.00722.46
5.6.90.0130.00922.39
5.6.80.0150.00722.49
5.6.70.0120.01022.44
5.6.60.0170.00522.25
5.6.50.0150.00722.42
5.6.40.0150.00522.41
5.6.30.0140.00922.33
5.6.20.0170.00322.37
5.6.10.0190.00122.35
5.6.00.0180.00622.35

preferences:
172.77 ms | 993 KiB | 7 Q