3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "моя строка"; $encoding = "UTF-8"; $first_letter = mb_strtoupper(mb_substr($str, 0, 1, $encoding), $encoding); $str = $first_letter . mb_substr($str, 1, mb_strlen($str, $encoding), $encoding); echo $str;

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)
8.3.60.0170.00316.50
8.3.50.0050.01422.88
8.3.40.0110.01118.86
8.3.30.0030.01018.76
8.3.20.0090.00620.30
8.3.10.0040.00421.73
8.3.00.0040.00419.66
8.2.180.0110.00416.37
8.2.170.0110.00422.96
8.2.160.0000.01420.53
8.2.150.0030.00524.18
8.2.140.0000.00824.66
8.2.130.0040.00426.16
8.2.120.0040.00719.05
8.2.110.0080.00022.29
8.2.100.0070.00717.49
8.2.90.0000.00819.08
8.2.80.0000.00719.46
8.2.70.0060.00317.63
8.2.60.0080.00017.79
8.2.50.0030.00618.07
8.2.40.0030.00518.05
8.2.30.0070.00019.30
8.2.20.0030.00517.55
8.2.10.0040.00418.04
8.2.00.0000.00717.87
8.1.280.0070.00725.92
8.1.270.0030.00624.01
8.1.260.0000.00726.35
8.1.250.0000.00728.09
8.1.240.0030.00623.79
8.1.230.0000.01119.00
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0000.01017.35
8.1.190.0000.00817.30
8.1.180.0030.00518.10
8.1.170.0060.00318.57
8.1.160.0050.00218.89
8.1.150.0040.00418.82
8.1.140.0040.00417.50
8.1.130.0030.00317.75
8.1.120.0070.00017.37
8.1.110.0000.00717.46
8.1.100.0000.00717.42
8.1.90.0000.00717.27
8.1.80.0070.00017.45
8.1.70.0000.00717.41
8.1.60.0000.00817.47
8.1.50.0040.00417.53
8.1.40.0060.00317.40
8.1.30.0030.00617.64
8.1.20.0050.00217.54
8.1.10.0000.00717.47
8.1.00.0040.00417.46
8.0.300.0030.00518.77
8.0.290.0070.00017.14
8.0.280.0030.00518.45
8.0.270.0030.00317.22
8.0.260.0040.00417.28
8.0.250.0030.00316.98
8.0.240.0060.00017.03
8.0.230.0070.00016.99
8.0.220.0070.00016.93
8.0.210.0030.00316.96
8.0.200.0000.00716.88
8.0.190.0030.00317.00
8.0.180.0000.00716.90
8.0.170.0050.00317.03
8.0.160.0060.00316.91
8.0.150.0000.00716.86
8.0.140.0070.00016.93
8.0.130.0000.00713.36
8.0.120.0000.00816.93
8.0.110.0000.00816.92
8.0.100.0030.00316.74
8.0.90.0000.00816.90
8.0.80.0060.01016.93
8.0.70.0040.00416.73
8.0.60.0000.00716.94
8.0.50.0080.00016.82
8.0.30.0110.00717.17
8.0.20.0110.01017.40
8.0.10.0040.00416.96
8.0.00.0120.00816.81
7.4.330.0020.00215.05
7.4.320.0070.00016.58
7.4.300.0030.00316.47
7.4.290.0050.00216.63
7.4.280.0070.00016.50
7.4.270.0000.00616.58
7.4.260.0000.01016.48
7.4.250.0040.00416.51
7.4.240.0020.00516.60
7.4.230.0000.00716.50
7.4.220.0060.01316.59
7.4.210.0120.00316.46
7.4.200.0000.00716.42
7.4.160.0030.01316.41
7.4.150.0110.00817.40
7.4.140.0100.00817.86
7.4.130.0130.00516.40
7.4.120.0040.01316.50
7.4.110.0100.01016.47
7.4.100.0030.01316.37
7.4.90.0110.00416.64
7.4.80.0130.00319.39
7.4.70.0100.00716.54
7.4.60.0030.01316.49
7.4.50.0030.00616.41
7.4.40.0100.00716.57
7.4.30.0110.00516.45
7.4.00.0000.01314.79
7.3.330.0030.00313.29
7.3.320.0030.00313.16
7.3.310.0000.00816.39
7.3.300.0030.00316.30
7.3.290.0070.01116.30
7.3.280.0100.00616.30
7.3.270.0110.00817.40
7.3.260.0100.01316.42
7.3.250.0120.00516.32
7.3.240.0110.01116.30
7.3.230.0100.00716.39
7.3.210.0100.00716.36
7.3.200.0050.01719.39
7.3.190.0030.01216.42
7.3.180.0120.00416.41
7.3.170.0100.01416.39
7.3.160.0130.00716.53
7.3.10.0000.01316.67
7.3.00.0050.00516.46
7.2.330.0150.00616.75
7.2.320.0070.01016.78
7.2.310.0070.01016.52
7.2.300.0120.00416.66
7.2.290.0160.00716.76
7.2.130.0070.00717.09
7.2.120.0110.00316.98
7.2.110.0030.01016.80
7.2.100.0030.00616.83
7.2.90.0060.00916.93
7.2.80.0100.00716.93
7.2.70.0090.00616.78
7.2.60.0070.00717.06
7.2.50.0090.00616.71
7.2.40.0110.00016.88
7.2.30.0030.00917.09
7.2.20.0110.00416.74
7.2.10.0060.01216.54
7.2.00.0000.01118.13
7.1.250.0030.00715.96
7.1.100.0180.01117.86
7.1.70.0080.00017.36
7.1.60.0100.01319.34
7.1.50.0170.00716.80
7.1.00.0030.07722.57
7.0.200.0050.00516.84
7.0.140.0030.04722.04
7.0.60.0070.07319.96
7.0.50.0100.05017.84
7.0.40.0100.06720.30
7.0.30.0270.04320.16
7.0.20.0200.06020.19
7.0.10.0070.04020.17
7.0.00.0130.07720.12
5.6.280.0030.07720.77
5.6.210.0100.04020.76
5.6.200.0070.03718.08
5.6.190.0030.04320.45
5.6.180.0230.08320.58
5.6.170.0270.07320.48
5.6.160.0000.04320.71
5.6.150.0000.04018.17
5.6.140.0030.08718.21
5.6.130.0000.09318.20
5.6.120.0130.05020.99
5.6.110.0070.07021.08
5.6.100.0030.04321.00
5.6.90.0000.04320.96
5.6.80.0130.07020.50
5.5.350.0000.08020.48
5.5.340.0200.05717.91
5.5.330.0170.05320.40
5.5.320.3970.04320.29
5.5.310.0170.05020.29
5.5.300.0030.04017.89
5.5.290.0100.05717.90
5.5.280.0030.04720.89
5.5.270.0030.08720.77
5.5.260.0070.07320.67
5.5.250.0070.06320.49
5.5.240.0170.03720.25
5.4.450.0200.03319.58
5.4.440.0230.05719.44
5.4.430.0170.07019.25
5.4.420.0130.06319.52
5.4.410.0170.05018.96
5.4.400.0200.05018.77
5.4.390.0070.06018.49
5.4.380.0100.05318.52
5.4.370.0130.06718.77
5.4.360.0170.04718.70
5.4.350.0100.04313.84
5.4.340.0100.04013.69
5.4.320.0130.04014.31
5.4.310.0130.04314.27
5.4.300.0200.03314.10
5.4.290.0130.03714.18
5.4.280.0100.03714.00
5.4.270.0070.04314.00
5.4.260.0130.04314.01
5.4.250.0100.04014.18
5.4.240.0130.03714.17
5.4.230.0100.04714.00
5.4.220.0200.02714.01
5.4.210.0130.03314.10
5.4.200.0100.04314.05
5.4.190.0100.05013.98
5.4.180.0070.06014.05
5.4.170.0170.05014.17
5.4.160.0070.04014.01
5.4.150.0100.04014.01
5.4.140.0070.04713.79
5.4.130.0130.03313.67
5.4.120.0130.03313.67
5.4.110.0130.03313.82
5.4.100.0100.03313.68
5.4.90.0170.03013.70
5.4.80.0070.04013.64
5.4.70.0000.04313.87
5.4.60.0130.03713.68
5.4.50.0070.05013.68
5.4.40.0270.02713.59
5.4.30.0170.03313.86
5.4.20.0070.04013.65
5.4.10.0030.04013.70
5.4.00.0100.04713.16
5.3.290.0070.04714.48
5.3.280.0070.04314.49
5.3.270.0130.04314.56
5.3.260.0100.04014.51
5.3.250.0100.04014.45
5.3.240.0170.03714.65
5.3.230.0200.03014.48
5.3.220.0100.03714.58
5.3.210.0030.04714.49
5.3.200.0070.04714.56
5.3.190.0100.04014.45
5.3.180.0100.04014.45
5.3.170.0100.03714.61
5.3.160.0170.03714.45
5.3.150.0100.04014.38
5.3.140.0170.03014.57
5.3.130.0170.03314.45
5.3.120.0100.04714.56
5.3.110.0100.04014.41
5.3.100.0200.03013.94
5.3.90.0030.05014.07
5.3.80.0200.03313.86
5.3.70.0100.04713.94
5.3.60.0130.03713.88
5.3.50.0170.03313.93
5.3.40.0130.03313.93
5.3.30.0170.03013.93
5.3.20.0130.04013.72
5.3.10.0170.03013.47
5.3.00.0100.03713.47
5.2.170.0070.04011.02
5.2.160.0100.02711.09
5.2.150.0000.03711.01
5.2.140.0030.04011.20
5.2.130.0100.03011.18
5.2.120.0070.03010.97
5.2.110.0100.03010.95
5.2.100.0100.03011.06
5.2.90.0070.03711.20
5.2.80.0030.03710.98
5.2.70.0030.03710.97
5.2.60.0100.03311.01
5.2.50.0000.03710.96
5.2.40.0130.02310.91
5.2.30.0070.03310.93
5.2.20.0070.03310.93
5.2.10.0070.03010.84
5.2.00.0070.03310.65
5.1.60.0030.0339.95
5.1.50.0030.0379.94
5.1.40.0070.0309.95
5.1.30.0070.03010.39
5.1.20.0030.03010.24
5.1.10.0100.02710.06
5.1.00.0070.02710.02
5.0.50.0030.0238.50
5.0.40.0030.0208.41
5.0.30.0130.0338.13
5.0.20.0000.0278.25
5.0.10.0000.0238.11
5.0.00.0030.0308.22
4.4.90.0000.0205.85
4.4.80.0000.0205.75
4.4.70.0030.0175.83
4.4.60.0030.0175.84
4.4.50.0000.0205.76
4.4.40.0070.0275.80
4.4.30.0130.0105.84
4.4.20.0030.0175.93
4.4.10.0000.0275.91
4.4.00.0070.0275.83
4.3.110.0030.0175.78
4.3.100.0030.0175.77
4.3.90.0000.0175.76
4.3.80.0070.0275.71
4.3.70.0030.0205.70
4.3.60.0030.0235.71
4.3.50.0030.0205.83
4.3.40.0070.0235.69
4.3.30.0030.0134.61
4.3.20.0070.0174.52
4.3.10.0030.0174.49
4.3.00.0030.01716.65

preferences:
36.11 ms | 401 KiB | 5 Q