3v4l.org

run code in 300+ PHP versions simultaneously
<?php $modules_flipped = array_flip(['aaa', 'bbb', 'ccc', 'ddd', 'eee', 'fff', 'ggg', 'hhh', 'iii', 'jjj']); $module = key($modules_flipped); print "$module -- begin\n"; // No unset, just next(). next($modules_flipped); $module = key($modules_flipped); print "$module -- after next()\n"; // next() + unset(). next($modules_flipped); unset($modules_flipped[$module]); $module = key($modules_flipped); print "$module -- after next() + unset()\n"; print "\nNotice that 'ddd' is being skipped!\n\n"; // unset() + next(). unset($modules_flipped[$module]); next($modules_flipped); $module = key($modules_flipped); print "$module -- after unset() + next()\n"; // unset(). unset($modules_flipped[$module]); $module = key($modules_flipped); print "$module -- after unset()\n"; // unset() + set. unset($modules_flipped[$module]); $modules_flipped[$module] = 0; $module = key($modules_flipped); print "$module -- after unset() + set\n"; print "\nNotice that 'ggg' is being repeated!\n\n"; // nothing. $module = key($modules_flipped); print "$module -- after nothing\n";

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)
8.4.130.0090.01117.80
8.4.120.0160.00420.64
8.4.110.0120.00922.34
8.4.100.0120.00618.11
8.4.90.0130.00820.63
8.4.80.0060.00218.95
8.4.70.0090.00618.95
8.4.60.0140.00520.52
8.4.50.0030.00622.07
8.4.40.0000.01317.50
8.4.30.0060.00318.77
8.4.20.0090.01217.79
8.4.10.0040.00420.49
8.3.260.0090.01116.27
8.3.250.0050.00318.84
8.3.240.0130.00616.72
8.3.230.0120.00616.65
8.3.220.0040.00420.87
8.3.210.0100.00916.66
8.3.200.0050.00416.78
8.3.190.0030.00520.65
8.3.180.0060.00220.56
8.3.170.0110.00716.86
8.3.160.0140.00416.54
8.3.150.0000.00816.44
8.3.140.0100.00719.07
8.3.130.0030.00516.70
8.3.120.0130.00618.75
8.3.110.0070.00720.94
8.3.100.0060.00316.48
8.3.90.0080.00016.62
8.3.80.0050.00518.39
8.3.70.0110.00716.63
8.3.60.0070.00718.40
8.3.50.0130.00724.44
8.3.40.0060.01018.70
8.3.30.0140.00418.61
8.3.20.0050.00321.79
8.3.10.0000.00821.98
8.3.00.0050.00323.44
8.2.290.0120.00918.81
8.2.280.0150.00419.01
8.2.270.0050.00316.82
8.2.260.0040.01117.26
8.2.250.0050.00318.46
8.2.240.0130.01018.95
8.2.230.0000.00922.58
8.2.220.0030.00724.06
8.2.210.0060.01326.77
8.2.200.0040.00416.75
8.2.190.0090.00616.58
8.2.180.0120.00616.38
8.2.170.0120.00322.96
8.2.160.0070.00722.26
8.2.150.0070.00024.18
8.2.140.0100.00724.66
8.2.130.0080.00026.16
8.2.120.0040.00426.16
8.2.110.0060.00619.27
8.2.100.0070.00417.91
8.2.90.0080.00017.75
8.2.80.0000.00818.79
8.2.70.0080.00017.68
8.2.60.0000.00818.22
8.2.50.0030.00619.20
8.2.40.0080.00019.53
8.2.30.0040.00419.44
8.2.20.0000.00718.05
8.2.10.0040.00419.33
8.2.00.0030.00519.38
8.1.330.0110.00722.11
8.1.320.0110.00722.22
8.1.310.0090.00916.81
8.1.300.0110.00016.34
8.1.290.0090.00318.88
8.1.280.0120.00325.92
8.1.270.0070.00022.19
8.1.260.0000.00826.35
8.1.250.0060.00328.09
8.1.240.0110.00021.98
8.1.230.0030.00920.96
8.1.220.0040.00417.78
8.1.210.0090.00018.77
8.1.200.0030.00617.00
8.1.190.0000.00817.25
8.1.180.0040.00418.90
8.1.170.0050.00518.53
8.1.160.0070.00019.01
8.1.150.0040.00418.75
8.1.140.0040.00418.70
8.1.130.0070.00020.14
8.1.120.0070.00017.43
8.1.110.0080.00017.29
8.1.100.0030.00517.42
8.1.90.0040.00417.45
8.1.80.0030.00617.40
8.1.70.0030.00317.38
8.1.60.0040.00417.53
8.1.50.0050.00317.36
8.1.40.0000.00817.35
8.1.30.0040.00417.56
8.1.20.0060.00317.63
8.1.10.0030.00617.54
8.1.00.0080.00017.54
8.0.300.0080.00018.77
8.0.290.0060.00316.63
8.0.280.0000.00718.33
8.0.270.0050.00216.86
8.0.260.0030.00318.47
8.0.250.0060.00016.95
8.0.240.0030.00316.93
8.0.230.0000.00716.98
8.0.220.0000.00716.87
8.0.210.0030.00316.82
8.0.200.0030.00316.88
8.0.190.0040.00416.85
8.0.180.0070.00016.93
8.0.170.0000.00916.91
8.0.160.0030.00516.87
8.0.150.0070.00016.93
8.0.140.0110.00016.80
8.0.130.0000.00613.29
8.0.120.0070.00016.80
8.0.110.0000.00816.84
8.0.100.0080.00016.96
8.0.90.0030.00616.96
8.0.80.0050.00916.89
8.0.70.0070.00016.81
8.0.60.0040.00416.71
8.0.50.0000.00716.94
8.0.30.0040.01317.28
8.0.20.0060.01316.89
8.0.10.0050.00217.08
8.0.00.0120.00916.85
7.4.330.0000.00515.55
7.4.320.0060.00016.55
7.4.300.0040.00416.62
7.4.290.0070.00016.57
7.4.280.0030.00716.57
7.4.270.0000.00716.67
7.4.260.0030.00313.25
7.4.250.0000.00816.50
7.4.240.0060.00116.55
7.4.230.0070.00016.68
7.4.220.0010.00616.61
7.4.210.0070.00716.58
7.4.200.0030.00316.64
7.4.130.0090.00916.44
7.4.120.0090.01016.50
7.4.110.0060.01216.77
7.4.100.0060.01116.66
7.4.90.0040.01216.74
7.4.80.0060.01219.39
7.4.70.0060.00916.63
7.4.60.0060.01016.43
7.4.50.0080.00516.46
7.4.40.0080.00916.33
7.4.30.0160.00516.53
7.4.20.0170.00716.63
7.4.10.0100.00716.41
7.4.00.0040.01416.43
7.3.330.0000.00816.30
7.3.320.0050.00013.02
7.3.310.0000.00716.13
7.3.300.0070.00016.38
7.3.290.0080.00816.32
7.3.260.0170.00916.75
7.3.240.0080.01216.53
7.3.230.0100.00716.56
7.3.210.0130.00316.38
7.3.200.0120.00416.59
7.3.190.0190.00516.43
7.3.180.0130.00316.38
7.3.170.0090.00916.33
7.3.160.0070.01016.48
7.3.150.0110.00916.32
7.3.140.0100.00916.42
7.3.130.0100.01416.54
7.3.120.0070.01116.51
7.3.110.0120.00616.52
7.3.100.0030.01716.36
7.3.90.0120.00616.39
7.3.80.0120.00616.13
7.3.70.0130.00316.24
7.3.60.0100.01016.26
7.3.50.0090.00616.47
7.3.40.0150.00016.42
7.3.30.0140.00316.46
7.3.20.0090.00916.41
7.3.10.0130.00616.46
7.3.00.0060.01316.35
7.2.330.0110.01216.55
7.2.320.0110.01116.44
7.2.310.0090.00616.74
7.2.300.0050.01416.57
7.2.290.0040.01516.48
7.2.280.0060.01516.45
7.2.270.0090.00916.64
7.2.260.0090.01216.22
7.2.250.0090.01316.61
7.2.240.0060.01216.82
7.2.230.0120.00916.73
7.2.220.0080.01116.63
7.2.210.0030.01416.34
7.2.200.0110.00716.40
7.2.190.0030.01616.55
7.2.180.0110.00816.80
7.2.170.0080.00916.55
7.2.160.0060.01116.67
7.2.150.0070.01116.43
7.2.140.0150.00916.62
7.2.130.0130.01016.62
7.2.120.0140.00316.58
7.2.110.0110.00716.48
7.2.100.0090.01316.57
7.2.90.0150.00316.45
7.2.80.0120.00616.47
7.2.70.0110.01016.67
7.2.60.0150.00616.45
7.2.50.0150.00616.58
7.2.40.0000.01716.63
7.2.30.0100.00716.63
7.2.20.0170.00616.52
7.2.10.0100.01016.38
7.2.00.0080.01016.32

preferences:
28.55 ms | 403 KiB | 5 Q