3v4l.org

run code in 300+ PHP versions simultaneously
<?php function get_next_colid(string $id): string { if ($id === '') { return "\0"; } $length = \strlen($id); for ($i = $length - 1; $i >= 0; $i--) { if ($id[$i] === "\xff") { $id[$i] = "\0"; continue; } $id[$i] = \chr(\ord($id[$i]) + 1); return $id; } return str_repeat("\0", $length + 1); } var_dump( get_next_colid(''), get_next_colid('hello'), get_next_colid('world'), get_next_colid('a'), get_next_colid('c'), get_next_colid('🔗'), );

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)
8.5.30.0120.00620.31
8.5.20.0080.00820.07
8.5.10.0110.00620.27
8.5.00.0150.00819.81
8.4.180.0120.00921.82
8.4.170.0100.01220.36
8.4.160.0090.01320.70
8.4.150.0090.00516.89
8.4.140.0110.01017.71
8.4.130.0110.00818.65
8.4.120.0070.00518.88
8.4.110.0070.01219.04
8.4.100.0130.00817.52
8.4.90.0070.00620.20
8.4.80.0040.00418.84
8.4.70.0110.00918.87
8.4.60.0150.00520.36
8.4.50.0110.00920.34
8.4.40.0170.00319.21
8.4.30.0090.00918.60
8.4.20.0120.00619.69
8.4.10.0060.00320.76
8.3.300.0070.01419.25
8.3.290.0080.01520.81
8.3.280.0110.01018.36
8.3.270.0140.00516.61
8.3.260.0130.00616.73
8.3.250.0060.00416.41
8.3.240.0110.00916.52
8.3.230.0140.00916.39
8.3.220.0140.00418.82
8.3.210.0100.00816.49
8.3.200.0050.00416.61
8.3.190.0080.00617.11
8.3.180.0130.00720.67
8.3.170.0110.00817.14
8.3.160.0070.01016.63
8.3.150.0090.00916.84
8.3.140.0060.00316.35
8.3.130.0160.00316.43
8.3.120.0040.00418.62
8.3.110.0040.00420.94
8.3.100.0050.00324.06
8.3.90.0070.01326.77
8.3.80.0060.00616.63
8.3.70.0070.00716.58
8.3.60.0070.00718.30
8.3.50.0090.00620.36
8.3.40.0090.00619.10
8.3.30.0120.00619.17
8.3.20.0070.00024.18
8.3.10.0070.00424.66
8.3.00.0110.00026.16
8.2.300.0100.00920.41
8.2.290.0060.01016.98
8.2.280.0130.00618.25
8.2.270.0070.01116.47
8.2.260.0090.00317.02
8.2.250.0080.00016.41
8.2.240.0000.00819.00
8.2.230.0030.00522.58
8.2.220.0000.00837.54
8.2.210.0100.00726.77
8.2.200.0070.00416.75
8.2.190.0100.01016.63
8.2.180.0100.01325.92
8.2.170.0070.00718.79
8.2.160.0070.00722.96
8.2.150.0040.00425.66
8.2.140.0070.00024.66
8.2.130.0040.00426.16
8.2.120.0070.00026.16
8.2.110.0040.00721.12
8.2.100.0040.00817.95
8.2.90.0050.00317.88
8.2.80.0030.00617.97
8.2.70.0030.00517.75
8.2.60.0050.00317.63
8.2.50.0030.00617.98
8.2.40.0090.00018.34
8.2.30.0030.00618.42
8.2.20.0040.00420.39
8.2.10.0040.00418.02
8.2.00.0040.00419.29
8.1.340.0120.00720.18
8.1.330.0130.00516.31
8.1.320.0090.00816.93
8.1.310.0120.00316.77
8.1.300.0060.00318.12
8.1.290.0060.00318.88
8.1.280.0190.00325.92
8.1.270.0080.00023.99
8.1.260.0030.00526.35
8.1.250.0080.00028.09
8.1.240.0080.00317.36
8.1.230.0060.00617.83
8.1.220.0000.00817.78
8.1.210.0040.00418.77
8.1.200.0000.00917.23
8.1.190.0030.00517.35
8.1.180.0040.00418.10
8.1.170.0030.00617.62
8.1.160.0020.00718.80
8.1.150.0000.00818.64
8.1.140.0040.00417.45
8.1.130.0040.00418.80
8.1.120.0000.00817.43
8.1.110.0040.00417.46
8.1.100.0030.00417.46
8.1.90.0040.00417.47
8.1.80.0000.00717.41
8.1.70.0030.00317.51
8.1.60.0040.00417.54
8.1.50.0080.00017.57
8.1.40.0070.00017.49
8.1.30.0040.01017.46
8.1.20.0100.00317.47
8.1.10.0070.00417.50
8.1.00.0050.00517.27
8.0.300.0080.00018.77
8.0.290.0040.00416.75
8.0.280.0030.00518.32
8.0.270.0000.00716.81
8.0.260.0030.00318.35
8.0.250.0040.00416.84
8.0.240.0030.00516.83
8.0.230.0030.00316.97
8.0.220.0070.00016.92
8.0.210.0030.00516.90
8.0.200.0030.00316.94
8.0.190.0040.00417.02
8.0.180.0040.00416.80
8.0.170.0030.00616.73
8.0.160.0080.00016.80
8.0.150.0090.00016.65
8.0.140.0000.01016.71
8.0.130.0040.00416.76
8.0.120.0030.00716.69
8.0.110.0030.00616.81
8.0.100.0030.00616.79
8.0.90.0030.00616.75
8.0.80.0030.00616.77
8.0.70.0000.00916.84
8.0.60.0060.00316.73
8.0.50.0030.00616.71
8.0.30.0000.00916.77
8.0.20.0060.00316.78
8.0.10.0000.00816.89
7.4.330.0000.00515.55
7.4.320.0000.00616.65
7.4.300.0000.00716.65
7.4.290.0060.00016.51
7.4.280.0060.00316.37
7.4.270.0050.00516.44
7.4.260.0050.00516.45
7.4.250.0000.01016.45
7.4.240.0030.00616.46
7.4.230.0030.00616.48
7.4.220.0080.00316.37
7.4.210.0030.00616.38
7.4.200.0030.00616.48
7.4.190.0070.00316.44
7.4.180.0040.00716.57
7.4.160.0050.00516.42
7.4.150.0060.00316.32
7.4.140.0000.01016.32
7.4.130.0070.00316.29
7.4.120.0090.00016.26
7.4.110.0060.00316.36
7.4.100.0050.00316.46
7.4.90.0090.00016.21
7.4.80.0070.00316.36
7.4.70.0070.00316.33
7.4.60.0030.00616.34
7.4.50.0030.00616.28
7.4.40.0000.01116.30
7.4.30.0110.00016.30
7.4.20.0100.00516.21
7.4.10.0000.00916.27
7.4.00.0000.00916.34

preferences:
57.06 ms | 1248 KiB | 5 Q