3v4l.org

run code in 300+ PHP versions simultaneously
<?php function get_next_colid(string $id): string { if ($id === '') { return "\0"; } $chrs = str_split($id); $bytes = array_map(fn(string $chr): int => ord($chr), $chrs); $last = array_pop($bytes); $last++; $bytes[] = $last; $reveresed = array_reverse($bytes); foreach($reveresed as $pos => $val) { if ($val > 255) { $reveresed[$pos] = 255; if (isset($reveresed[$pos+1])) { $reveresed[$pos+1] += ($val - 255); } else { $reveresed[$pos+1] = ($val - 255); } } } $bytes = array_reverse($reveresed); $chrs = array_map(fn(int $byte): string => chr($byte), $bytes); return join('', $chrs); } 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)
8.5.30.0080.00820.13
8.5.20.0120.00620.26
8.5.10.0050.01220.26
8.5.00.0140.01119.88
8.4.180.0140.00919.82
8.4.170.0130.01120.63
8.4.160.0100.01123.98
8.4.150.0080.00616.87
8.4.140.0090.00917.56
8.4.130.0120.00817.44
8.4.120.0110.00920.73
8.4.110.0030.00522.17
8.4.100.0110.01119.66
8.4.90.0160.00618.66
8.4.80.0100.00818.02
8.4.70.0150.00917.63
8.4.60.0100.01018.88
8.4.50.0130.00820.44
8.4.40.0140.00719.38
8.4.30.0130.00618.66
8.4.20.0070.01019.76
8.4.10.0030.00620.66
8.3.300.0080.00420.92
8.3.290.0140.00620.83
8.3.280.0140.00618.27
8.3.270.0120.00916.64
8.3.260.0110.00516.53
8.3.250.0120.00718.63
8.3.240.0040.00416.79
8.3.230.0110.01016.37
8.3.220.0110.00817.43
8.3.210.0140.00416.63
8.3.200.0050.00716.66
8.3.190.0030.00517.16
8.3.180.0090.01016.73
8.3.170.0110.00718.96
8.3.160.0150.00317.18
8.3.150.0040.00418.85
8.3.140.0040.01116.72
8.3.130.0060.00316.34
8.3.120.0120.00020.78
8.3.110.0030.01318.46
8.3.100.0060.00616.62
8.3.90.0090.00626.77
8.3.80.0000.00918.45
8.3.70.0120.00616.58
8.3.60.0060.00918.48
8.3.50.0070.00720.16
8.3.40.0110.01119.16
8.3.30.0040.01119.38
8.3.20.0070.00024.18
8.3.10.0050.00224.66
8.3.00.0070.00326.16
8.2.300.0120.01224.13
8.2.290.0110.00820.65
8.2.280.0100.01018.54
8.2.270.0150.00320.37
8.2.260.0080.00017.44
8.2.250.0110.00018.67
8.2.240.0090.00016.92
8.2.230.0070.00320.94
8.2.220.0060.01224.06
8.2.210.0070.01126.77
8.2.200.0000.00916.75
8.2.190.0120.00916.63
8.2.180.0120.00325.92
8.2.170.0060.01219.09
8.2.160.0100.00322.96
8.2.150.0040.00425.66
8.2.140.0000.00724.66
8.2.130.0000.00926.16
8.2.120.0040.00426.16
8.2.110.0060.00321.11
8.2.100.0060.00617.91
8.2.90.0040.00417.84
8.2.80.0040.00418.86
8.2.70.0080.00017.63
8.2.60.0040.00418.05
8.2.50.0000.00817.98
8.2.40.0040.00418.09
8.2.30.0000.00818.30
8.2.20.0020.00520.32
8.2.10.0050.00318.05
8.2.00.0000.00719.18
8.1.340.0140.00617.68
8.1.330.0100.00821.75
8.1.320.0080.00616.13
8.1.310.0140.00316.79
8.1.300.0160.00318.24
8.1.290.0070.00330.84
8.1.280.0120.00625.92
8.1.270.0040.00423.99
8.1.260.0000.00826.35
8.1.250.0030.00628.09
8.1.240.0040.00723.80
8.1.230.0070.00420.89
8.1.220.0000.00817.79
8.1.210.0000.00820.48
8.1.200.0100.00017.35
8.1.190.0040.00417.35
8.1.180.0000.00818.10
8.1.170.0040.00717.62
8.1.160.0070.00318.95
8.1.150.0000.00718.69
8.1.140.0040.00417.39
8.1.130.0050.00517.37
8.1.120.0000.00717.30
8.1.110.0030.00617.48
8.1.100.0040.00417.39
8.1.90.0000.00817.46
8.1.80.0040.00317.45
8.1.70.0030.00317.40
8.1.60.0090.00017.61
8.1.50.0030.00617.51
8.1.40.0040.00417.42
8.1.30.0040.00417.57
8.1.20.0000.00917.60
8.1.10.0030.00717.64
8.1.00.0030.00617.51
8.0.300.0000.00819.89
8.0.290.0030.00616.63
8.0.280.0060.00318.32
8.0.270.0000.00716.70
8.0.260.0030.00316.87
8.0.250.0070.00016.85
8.0.240.0070.00016.95
8.0.230.0000.00716.84
8.0.220.0000.00816.79
8.0.210.0070.00416.86
8.0.200.0000.00716.93
8.0.190.0080.00016.84
8.0.180.0000.00716.83
8.0.170.0040.00416.84
8.0.160.0070.00016.75
8.0.150.0000.00816.93
8.0.140.0030.00616.84
8.0.130.0040.00416.69
8.0.120.0020.00516.82
8.0.110.0040.00416.87
8.0.100.0040.00416.88
8.0.90.0070.00016.81
8.0.80.0080.00016.85
8.0.70.0060.00316.73
8.0.60.0000.00817.00
8.0.50.0000.00716.77
8.0.30.0060.00316.90
8.0.20.0070.00016.98
8.0.10.0060.00317.01
7.4.330.0050.00015.55
7.4.320.0040.00416.43
7.4.300.0030.00316.53
7.4.290.0060.00316.52
7.4.280.0000.00816.41
7.4.270.0050.00316.50
7.4.260.0050.00316.43
7.4.250.0070.00016.51
7.4.240.0030.00616.52
7.4.230.0030.00316.54
7.4.220.0030.00516.55
7.4.210.0000.00816.51
7.4.200.0030.00616.61
7.4.190.0040.00416.73
7.4.180.0050.00516.45
7.4.160.0060.00316.57
7.4.150.0040.00416.53
7.4.140.0000.00716.51
7.4.130.0000.00916.54
7.4.120.0070.00016.41
7.4.110.0040.00416.51
7.4.100.0040.00416.51
7.4.90.0030.00616.55
7.4.80.0030.00516.59
7.4.70.0040.00416.32
7.4.60.0040.00416.48
7.4.50.0070.00016.31
7.4.40.0030.00516.41
7.4.30.0070.00016.55
7.4.20.0000.00716.45
7.4.10.0050.00316.45
7.4.00.0000.00716.50

preferences:
45.77 ms | 1248 KiB | 5 Q