3v4l.org

run code in 300+ PHP versions simultaneously
<?php function romanToDecimal($num) { $dec = 0; $i = 0; $romans = ['M', 'D', 'C', 'L', 'X', 'V', 'I']; $decs = [1000, 500, 100, 50, 10, 5, 1]; $rptr = 0; $num .= ' '; while ($i < strlen($num) - 1) { if ($num[$i] === $romans[$rptr]) { if (($rptr > 0) && ($num[$i + 1] === $romans[$rptr - 1])) { $dec -= $decs[$rptr]; $rptr -= 1; } else if (($rptr > 1) && ($num[$i + 1] === $romans[$rptr - 2])) { $dec -= $decs[$rptr]; $rptr -= 2; } else { $dec += $decs[$rptr]; } $i++; } else { $rptr++; if($rptr > count($decs)) return -1; } } return $dec; } function decimal2roman($num) { $romans = ['M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I']; $decs = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1]; $len = count($decs); $rom = ''; while ($num) { $i = 0; while ($decs[$i++] > $num && $i < $len); $rom .= $romans[$i]; $num -= $decs[i]; } return $rom; } echo romanToDecimal('MCXII') . "\n"; echo romanToDecimal('LIII') . "\n"; echo romanToDecimal('XCIX') . "\n"; echo romanToDecimal('XLVII') . "\n"; echo romanToDecimal('I') . "\n"; echo romanToDecimal('IV') . "\n"; echo romanToDecimal('DCCCXCIX') . "\n"; echo romanToDecimal('MMMCMXCIX') . "\n"; echo decimal2roman(128) . "\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)
8.3.60.0080.00616.75
8.3.50.0120.00822.07
8.3.40.0070.00718.92
8.3.30.0030.01019.21
8.3.20.0080.00020.30
8.3.10.0040.00423.52
8.3.00.0000.00822.40
8.2.180.0040.01116.63
8.2.170.0100.01022.96
8.2.160.0060.00820.54
8.2.150.0060.00324.18
8.2.140.0030.00624.66
8.2.130.0070.00026.16
8.2.120.0040.00422.14
8.2.110.0080.00022.08
8.2.100.0030.00917.54
8.2.90.0000.00819.36
8.2.80.0040.00418.05
8.2.70.0060.00317.75
8.2.60.0050.00318.05
8.2.50.0030.00618.07
8.2.40.0050.00618.16
8.2.30.0070.00018.14
8.2.20.0040.00417.71
8.2.10.0000.00917.71
8.2.00.0040.00417.88
8.1.280.0140.00725.92
8.1.270.0000.00823.79
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0100.00023.81
8.1.230.0080.00319.07
8.1.220.0090.00017.74
8.1.210.0090.00018.77
8.1.200.0040.00417.47
8.1.190.0060.00317.42
8.1.180.0000.00818.10
8.1.170.0040.00418.56
8.1.160.0040.00421.91
8.1.150.0020.00518.57
8.1.140.0040.00417.47
8.1.130.0030.00317.69
8.1.120.0040.00417.50
8.1.110.0040.00417.36
8.1.100.0000.00717.46
8.1.90.0040.00417.51
8.1.80.0070.00017.50
8.1.70.0030.00317.34
8.1.60.0000.00817.61
8.1.50.0000.00817.47
8.1.40.0050.00317.43
8.1.30.0060.00317.51
8.1.20.0030.00517.68
8.1.10.0000.00817.57
8.1.00.0000.00817.59
8.0.300.0070.00018.77
8.0.290.0070.00017.02
8.0.280.0000.00718.46
8.0.270.0040.00417.40
8.0.260.0030.00318.38
8.0.250.0020.00516.93
8.0.240.0000.00716.93
8.0.230.0000.00817.07
8.0.220.0000.00716.84
8.0.210.0030.00316.86
8.0.200.0070.00017.09
8.0.190.0000.00817.00
8.0.180.0030.00716.98
8.0.170.0050.00316.91
8.0.160.0040.00416.85
8.0.150.0040.00316.91
8.0.140.0030.00616.82
8.0.130.0030.00313.41
8.0.120.0030.00516.91
8.0.110.0000.00816.96
8.0.100.0040.00416.88
8.0.90.0000.00716.77
8.0.80.0110.00716.91
8.0.70.0030.00616.86
8.0.60.0040.00416.78
8.0.50.0020.00516.82
8.0.30.0110.00816.98
8.0.20.0130.00717.40
8.0.10.0030.00517.16
8.0.00.0090.01216.73
7.4.330.0130.00015.00
7.4.320.0050.00316.52
7.4.300.0110.00716.55
7.4.290.0000.00716.50
7.4.280.0070.00016.50
7.4.270.0040.00416.46
7.4.260.0060.00616.53
7.4.250.0000.00816.48
7.4.240.0010.00716.46
7.4.230.0050.00516.46
7.4.220.0190.00916.45
7.4.210.0110.01016.47
7.4.200.0050.00316.48
7.4.190.0030.00516.40
7.4.160.0150.01216.50
7.4.150.0060.01517.40
7.4.140.0250.01317.86
7.4.130.0170.01216.52
7.4.120.0120.01616.55
7.4.110.0060.01216.39
7.4.100.0370.02816.63
7.4.90.0320.01716.59
7.4.80.0170.00319.39
7.4.70.0130.00716.47
7.4.60.0100.01416.50
7.4.50.0220.01516.49
7.4.40.0070.01022.77
7.4.30.0090.00816.43
7.4.00.0070.01014.88
7.3.330.0050.00413.49
7.3.320.0000.00713.49
7.3.310.0000.00916.26
7.3.300.0040.00416.22
7.3.290.0130.01716.25
7.3.280.0090.01216.33
7.3.270.0100.01017.40
7.3.260.0090.01616.54
7.3.250.0340.02316.27
7.3.240.0110.01716.35
7.3.230.0360.01116.39
7.3.210.0070.01416.29
7.3.200.0080.01219.39
7.3.190.0330.03016.58
7.3.180.0060.01216.32
7.3.170.0110.00716.44
7.3.160.0030.01316.57
7.3.120.0100.00714.90
7.2.330.0080.01316.56
7.2.320.0540.01716.90
7.2.310.0680.04116.70
7.2.300.0910.01916.84
7.2.290.0170.00616.83
7.2.60.0060.01316.89
7.1.200.0080.00515.95
7.1.70.0000.00816.92
7.1.60.0110.01419.29
7.1.50.0100.01717.05
7.1.00.0070.07722.23
7.0.200.0060.00616.83
7.0.140.0000.07322.15
7.0.100.0070.03720.05
7.0.90.0070.08319.97
7.0.80.0130.05719.98
7.0.70.0100.03319.97
7.0.60.0200.05720.09
7.0.50.0100.06720.39
7.0.40.0100.08320.14
7.0.30.0070.06719.95
7.0.20.0100.07320.04
7.0.10.0100.05020.12
7.0.00.0200.08020.13
5.6.250.0070.05020.77
5.6.240.0130.07720.65
5.6.230.0030.04320.66
5.6.220.0100.07020.61
5.6.210.0070.04320.46
5.6.200.0070.04321.06
5.6.190.0170.08321.13
5.6.180.0070.05321.02
5.6.170.0070.04721.19
5.6.160.0030.08321.15
5.6.150.0170.06021.13
5.6.140.0100.04720.93
5.6.130.0000.05020.96
5.6.120.0130.03721.06
5.6.110.0070.04321.03
5.6.100.0100.07021.11
5.6.90.0100.04021.02
5.6.80.0070.06320.48
5.6.70.0130.06320.47
5.6.60.0070.07720.33
5.6.50.0030.08720.48
5.6.40.0070.04020.42
5.6.30.0130.06720.43
5.6.20.0070.08020.40
5.6.10.0100.05020.32
5.6.00.0030.04020.41
5.5.380.0230.05320.39
5.5.370.0170.05020.45
5.5.360.0000.06720.43
5.5.350.0170.08020.47
5.5.340.0030.07020.79
5.5.330.0100.05720.73
5.5.320.0170.05020.86
5.5.310.0130.05020.85
5.5.300.0100.05720.95
5.5.290.0170.06020.99
5.5.280.0130.05720.79
5.5.270.0130.05720.72
5.5.260.0200.05320.89
5.5.250.0300.04020.54
5.5.240.0130.06320.27
5.5.230.0200.06720.11
5.5.220.0170.07720.27
5.5.210.0100.06020.35
5.5.200.0130.06720.32
5.5.190.0200.05020.16
5.5.180.0200.07020.30
5.5.160.0130.05720.31
5.5.150.0230.05020.31
5.5.140.0100.07320.29
5.5.130.0100.05320.23
5.5.120.0070.06720.20
5.5.110.0030.06320.29
5.5.100.0170.05020.10
5.5.90.0100.07320.22
5.5.80.0100.07720.15
5.5.70.0130.05320.14
5.5.60.0100.06320.24
5.5.50.0100.08320.13
5.5.40.0270.06320.02
5.5.30.0170.05020.18
5.5.20.0170.06020.05
5.5.10.0270.07320.01
5.5.00.0070.06320.08
5.4.450.0170.06319.39
5.4.440.0130.05719.18
5.4.430.0070.06319.55
5.4.420.0170.05719.40
5.4.410.0030.06319.20
5.4.400.0100.06319.13
5.4.390.0100.05318.86
5.4.380.0100.05319.09
5.4.370.0170.05319.05
5.4.360.0100.05718.93
5.4.350.0200.05319.08
5.4.340.0100.08719.04
5.4.320.0100.08019.08
5.4.310.0030.06319.06
5.4.300.0130.06019.11
5.4.290.0200.04719.06
5.4.280.0070.06019.05
5.4.270.0200.04719.03
5.4.260.0230.06019.06
5.4.250.0070.05719.20
5.4.240.0200.04318.90
5.4.230.0130.05719.07
5.4.220.0170.05319.19
5.4.210.0100.08019.07
5.4.200.0100.05319.07
5.4.190.0230.04018.89
5.4.180.0070.05718.96
5.4.170.0130.05019.07
5.4.160.0130.05319.04
5.4.150.0070.06319.05
5.4.140.0170.04316.54
5.4.130.0070.07716.57
5.4.120.0070.05316.48
5.4.110.0100.05016.50
5.4.100.0370.04316.53
5.4.90.0070.05316.54
5.4.80.0100.05016.41
5.4.70.0170.04316.44
5.4.60.0070.06016.41
5.4.50.0130.04716.23
5.4.40.0070.07716.43
5.4.30.0200.05016.57
5.4.20.0030.05316.32
5.4.10.0130.07016.50
5.4.00.0130.07015.96
5.3.290.0070.08014.72
5.3.280.0000.03714.60
5.3.270.0030.05714.55
5.3.260.0070.03714.67
5.3.250.0100.07314.59
5.3.240.0000.04014.54
5.3.230.0070.04314.62
5.3.220.0030.05714.59
5.3.210.0000.04014.59
5.3.200.0000.04014.63
5.3.190.0000.04014.55
5.3.180.0070.05014.63
5.3.170.0100.03014.63
5.3.160.0030.03714.56
5.3.150.0030.03714.68
5.3.140.0030.03714.52
5.3.130.0100.07714.66
5.3.120.0070.06314.52
5.3.110.0030.03714.57
5.3.100.0100.03314.05
5.3.90.0100.04714.09
5.3.80.0030.07713.94
5.3.70.0070.07314.10
5.3.60.0100.06014.12
5.3.50.0070.04013.87
5.3.40.0100.07314.01
5.3.30.0030.04013.93
5.3.20.0170.06313.75
5.3.10.0030.06313.67
5.3.00.0070.04713.73
5.2.170.0070.06011.14
5.2.160.0030.05711.20
5.2.150.0100.02711.23
5.2.140.0000.06711.04
5.2.130.0070.06311.21
5.2.120.0070.02711.10
5.2.110.0000.03311.00
5.2.100.0070.05311.15
5.2.90.0030.03711.13
5.2.80.0000.04011.20
5.2.70.0030.06011.12
5.2.60.0070.05310.96
5.2.50.0030.03010.96
5.2.40.0070.04311.05
5.2.30.0130.02710.96
5.2.20.0030.06310.98
5.2.10.0070.03710.96
5.2.00.0000.03310.96
5.1.60.0000.05710.96
5.1.50.0030.03710.96
5.1.40.0070.05010.96
5.1.30.0070.02710.96
5.1.20.0130.02010.96
5.1.10.0000.05310.96
5.1.00.0100.04710.96
5.0.50.0000.03710.96
5.0.40.0070.02310.96
5.0.30.0030.03310.96
5.0.20.0130.01310.96
5.0.10.0070.04310.96
5.0.00.0100.05010.96
4.4.90.0000.02310.96
4.4.80.0030.01310.96
4.4.70.0030.03010.96
4.4.60.0000.03710.96
4.4.50.0030.03010.96
4.4.40.0030.04710.96
4.4.30.0030.02010.96
4.4.20.0030.03710.96
4.4.10.0030.03710.96
4.4.00.0070.04710.96
4.3.110.0070.01310.96
4.3.100.0000.01710.96
4.3.90.0000.03310.96
4.3.80.0030.02710.96
4.3.70.0000.03310.96
4.3.60.0000.02010.96
4.3.50.0030.02010.96
4.3.40.0100.04310.96
4.3.30.0000.03710.96
4.3.20.0030.02010.96
4.3.10.0000.02010.96
4.3.00.0070.01310.96

preferences:
41.12 ms | 401 KiB | 5 Q