3v4l.org

run code in 300+ PHP versions simultaneously
<?php function get_next_colid(string $id): string { $length = \strlen($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)
8.5.30.0110.00720.09
8.5.20.0100.00620.27
8.5.10.0070.01020.16
8.5.00.0130.01219.93
8.4.180.0130.01019.68
8.4.170.0140.00920.40
8.4.160.0130.01123.75
8.4.150.0080.00516.95
8.4.140.0120.01017.53
8.4.130.0020.00717.86
8.4.120.0130.00724.04
8.4.110.0050.00521.55
8.4.100.0050.00518.95
8.4.90.0110.01019.04
8.4.80.0160.00420.30
8.4.70.0030.00517.85
8.4.60.0150.00518.80
8.4.50.0130.00918.61
8.4.40.0110.01019.28
8.4.30.0060.01318.59
8.4.20.0100.01019.56
8.4.10.0060.00320.45
8.3.300.0170.01120.76
8.3.290.0120.00920.72
8.3.280.0090.01020.62
8.3.270.0180.00616.42
8.3.260.0080.00217.02
8.3.250.0090.01018.69
8.3.240.0090.00917.13
8.3.230.0120.00716.42
8.3.220.0040.00418.96
8.3.210.0060.00816.68
8.3.200.0070.00216.81
8.3.190.0140.00617.09
8.3.180.0120.00916.91
8.3.170.0130.00322.55
8.3.160.0080.00017.06
8.3.150.0110.00717.16
8.3.140.0080.00016.67
8.3.130.0000.00818.23
8.3.120.0080.00018.83
8.3.110.0090.00020.94
8.3.100.0080.00018.47
8.3.90.0040.00418.43
8.3.80.0030.00616.36
8.3.70.0110.00418.30
8.3.60.0090.00618.43
8.3.50.0140.00020.11
8.3.40.0040.01119.21
8.3.30.0130.00319.34
8.3.20.0040.00424.18
8.3.10.0000.00724.66
8.3.00.0030.00626.16
8.2.300.0120.00921.92
8.2.290.0120.00520.34
8.2.280.0130.00718.45
8.2.270.0070.01117.36
8.2.260.0080.00016.44
8.2.250.0050.00318.69
8.2.240.0040.01117.18
8.2.230.0030.00622.58
8.2.220.0060.00324.06
8.2.210.0040.00726.77
8.2.200.0050.00516.38
8.2.190.0170.00316.58
8.2.180.0100.00725.92
8.2.170.0060.00919.10
8.2.160.0100.00322.96
8.2.150.0070.00025.66
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0070.00026.16
8.2.110.0050.00520.57
8.2.100.0000.01119.20
8.2.90.0040.00417.75
8.2.80.0040.00418.77
8.2.70.0000.00817.63
8.2.60.0000.00817.75
8.2.50.0040.00417.98
8.2.40.0000.00718.28
8.2.30.0030.00718.29
8.2.20.0070.00020.43
8.2.10.0040.00418.05
8.2.00.0070.00019.21
8.1.340.0090.01017.73
8.1.330.0110.00922.12
8.1.320.0040.00416.24
8.1.310.0000.00816.77
8.1.300.0040.01120.07
8.1.290.0060.00318.88
8.1.280.0120.01525.92
8.1.270.0050.00223.99
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0000.00923.96
8.1.230.0040.00720.99
8.1.220.0000.01018.65
8.1.210.0000.00818.77
8.1.200.0000.00817.35
8.1.190.0000.00817.35
8.1.180.0000.00818.10
8.1.170.0090.00017.62
8.1.160.0040.00718.80
8.1.150.0000.00718.68
8.1.140.0000.00717.55
8.1.130.0000.00718.90
8.1.120.0070.00017.46
8.1.110.0000.00717.41
8.1.100.0070.00017.51
8.1.90.0000.00717.52
8.1.80.0000.00717.41
8.1.70.0070.00017.41
8.1.60.0040.00417.55
8.1.50.0050.00317.51
8.1.40.0000.00717.55
8.1.30.0080.00317.57
8.1.20.0050.00617.50
8.1.10.0070.00517.42
8.1.00.0040.00717.34
8.0.300.0000.00818.77
8.0.290.0060.00316.88
8.0.280.0030.00618.37
8.0.270.0030.00316.76
8.0.260.0030.00318.32
8.0.250.0030.00316.92
8.0.240.0030.00616.94
8.0.230.0070.00016.98
8.0.220.0070.00016.88
8.0.210.0030.00516.89
8.0.200.0070.00016.95
8.0.190.0040.00416.97
8.0.180.0000.00716.95
8.0.170.0030.00616.81
8.0.160.0050.00516.86
8.0.150.0050.00516.79
8.0.140.0080.00616.79
8.0.130.0050.00716.72
8.0.120.0080.00516.80
8.0.110.0110.00116.84
8.0.100.0060.00616.77
8.0.90.0030.00816.84
8.0.80.0040.00716.81
8.0.70.0050.00416.89
8.0.60.0040.00616.72
8.0.50.0020.00916.72
8.0.30.0010.00816.78
8.0.20.0040.00816.91
8.0.10.0030.00616.92
7.4.330.0000.00515.55
7.4.320.0000.00616.50
7.4.300.0000.00616.49
7.4.290.0070.00016.45
7.4.280.0030.00716.42
7.4.270.0020.00816.42
7.4.260.0020.00816.42
7.4.250.0030.00716.40
7.4.240.0040.00416.47
7.4.230.0090.00016.44
7.4.220.0020.00716.44
7.4.210.0020.00716.38
7.4.200.0010.00716.44
7.4.190.0030.00616.56
7.4.180.0050.00416.49
7.4.160.0030.00616.57
7.4.150.0020.00716.39
7.4.140.0040.00516.36
7.4.130.0050.00516.39
7.4.120.0060.00316.31
7.4.110.0030.00616.43
7.4.100.0040.00416.37
7.4.90.0010.00816.38
7.4.80.0020.00716.36
7.4.70.0000.00916.35
7.4.60.0020.00816.37
7.4.50.0060.00316.37
7.4.40.0060.00316.26
7.4.30.0020.00816.35
7.4.20.0030.00616.31
7.4.10.0040.00516.33
7.4.00.0050.00416.37

preferences:
47.42 ms | 1248 KiB | 5 Q