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)
8.3.60.0090.00616.37
8.3.50.0110.00420.07
8.3.40.0090.01218.67
8.3.30.0090.00519.09
8.3.20.0080.00020.16
8.3.10.0040.00421.65
8.3.00.0080.00019.79
8.2.180.0070.00718.30
8.2.170.0100.00722.96
8.2.160.0070.00720.38
8.2.150.0050.00324.18
8.2.140.0050.00324.66
8.2.130.0080.00026.16
8.2.120.0070.00417.50
8.2.110.0000.01319.02
8.2.100.0090.00317.91
8.2.90.0000.00819.23
8.2.80.0000.00819.40
8.2.70.0030.00517.25
8.2.60.0060.00318.04
8.2.50.0030.00618.07
8.2.40.0040.00418.15
8.2.30.0040.00419.48
8.2.20.0060.00317.61
8.2.10.0070.00018.16
8.2.00.0070.00017.67
8.1.270.0040.00423.84
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0100.00022.20
8.1.230.0040.00722.63
8.1.220.0080.00017.79
8.1.210.0000.00818.77
8.1.200.0050.00517.35
8.1.190.0000.00917.53
8.1.180.0050.00318.10
8.1.170.0000.00818.51
8.1.160.0070.00018.95
8.1.150.0040.00419.02
8.1.140.0030.00617.51
8.1.130.0040.00417.89
8.1.120.0000.00717.55
8.1.110.0000.00717.45
8.1.100.0030.00317.46
8.1.90.0070.00017.36
8.1.80.0000.00717.45
8.1.70.0030.00317.38
8.1.60.0000.00917.56
8.1.50.0000.00817.50
8.1.40.0000.00817.46
8.1.30.0060.00317.62
8.1.20.0040.00417.64
8.1.10.0080.00017.53
8.1.00.0000.00817.48
8.0.300.0040.00418.77
8.0.290.0000.00716.93
8.0.280.0000.00718.42
8.0.270.0000.00716.92
8.0.260.0080.00017.31
8.0.250.0070.00017.00
8.0.240.0070.00016.97
8.0.230.0070.00017.08
8.0.220.0040.00416.89
8.0.210.0000.00717.02
8.0.200.0030.00316.89
8.0.190.0040.00416.96
8.0.180.0040.00416.80
8.0.170.0040.00416.91
8.0.160.0030.00316.93
8.0.150.0040.00416.87
8.0.140.0070.00016.97
8.0.130.0000.00513.30
8.0.120.0080.00016.91
8.0.110.0030.00516.92
8.0.100.0000.00716.99
8.0.90.0000.00716.72
8.0.80.0110.01116.99
8.0.70.0040.00416.80
8.0.60.0070.00016.94
8.0.50.0050.00316.92
8.0.30.0040.01717.07
8.0.20.0110.00717.40
8.0.10.0070.00017.00
8.0.00.0140.00516.77
7.4.330.0030.00315.12
7.4.320.0030.00316.52
7.4.300.0030.00316.54
7.4.290.0030.00316.49
7.4.280.0040.00416.58
7.4.270.0070.00016.50
7.4.260.0030.00616.49
7.4.250.0050.00216.37
7.4.240.0040.00416.53
7.4.230.0070.00016.57
7.4.220.0120.00616.46
7.4.210.0070.00716.55
7.4.200.0030.00316.48
7.4.160.0090.00616.48
7.4.150.0110.00617.40
7.4.140.0050.01817.86
7.4.130.0100.01116.51
7.4.120.0120.00816.53
7.4.110.0080.01816.36
7.4.100.0160.00616.43
7.4.90.0140.00316.47
7.4.80.0100.01119.39
7.4.70.0030.01316.61
7.4.60.0060.01016.68
7.4.50.0060.00316.57
7.4.40.0110.00616.46
7.4.30.0060.01116.46
7.4.00.0100.00514.94
7.3.330.0000.00613.05
7.3.320.0030.00313.05
7.3.310.0050.00316.25
7.3.300.0030.00316.34
7.3.290.0090.00716.32
7.3.280.0070.01016.30
7.3.270.0170.00017.40
7.3.260.0160.00616.43
7.3.250.0090.00816.40
7.3.240.0100.00716.36
7.3.230.0130.00316.47
7.3.210.0130.00316.26
7.3.200.0090.01019.39
7.3.190.0130.00316.22
7.3.180.0120.00316.57
7.3.170.0070.01016.46
7.3.160.0070.01016.22
7.3.120.0070.01014.86
7.3.110.0000.01815.11
7.3.100.0030.00614.68
7.3.90.0100.00314.48
7.3.80.0090.00614.69
7.3.70.0110.00314.96
7.3.60.0030.01014.81
7.3.50.0000.01014.88
7.3.40.0070.00714.50
7.3.30.0060.01214.74
7.3.20.0040.00716.75
7.3.10.0060.00316.95
7.3.00.0060.00616.86
7.2.330.0030.01316.62
7.2.320.0000.01616.63
7.2.310.0090.01216.51
7.2.300.0100.00716.64
7.2.290.0070.01116.65
7.2.250.0070.01014.95
7.2.240.0080.00615.06
7.2.230.0070.00714.78
7.2.220.0030.01314.97
7.2.210.0050.00515.19
7.2.200.0040.01114.65
7.2.190.0070.00714.77
7.2.180.0070.01015.06
7.2.170.0060.00915.11
7.2.00.0000.01919.66
7.1.330.0080.00416.07
7.1.320.0030.00715.87
7.1.310.0070.01016.03
7.1.300.0060.00315.91
7.1.290.0000.01715.80
7.1.280.0070.01115.83
7.1.270.0100.00715.87
7.1.260.0040.01115.96
7.1.200.0070.00315.60
7.1.100.0060.00618.13
7.1.70.0050.00317.41
7.1.60.0120.01219.34
7.1.50.0110.01417.14
7.1.00.0070.07322.51
7.0.200.0040.00416.72
7.0.140.0070.07322.00
7.0.60.0130.07319.91
7.0.50.0070.08317.84
7.0.40.0000.09720.20
7.0.30.0300.06720.30
7.0.20.0270.07320.05
7.0.10.0100.08020.16
7.0.00.0100.04020.17
5.6.280.0000.08020.77
5.6.210.0100.07720.46
5.6.200.0100.06018.12
5.6.190.0070.08720.77
5.6.180.0230.03020.60
5.6.170.0230.06720.41
5.6.160.0130.06320.49
5.6.150.0100.06018.12
5.6.140.0100.05018.12
5.6.130.0070.07318.07
5.6.120.0200.06320.93
5.6.110.0070.08021.00
5.6.100.0100.08021.08
5.6.90.0100.07721.07
5.6.80.0030.06320.41
5.5.350.0170.07320.40
5.5.340.0030.04017.99
5.5.330.0100.04020.23
5.5.320.0330.03720.20
5.5.310.0200.05720.21
5.5.300.0070.04717.91
5.5.290.0030.04017.89
5.5.280.0130.07720.88
5.5.270.0070.04320.94
5.5.260.0030.04020.83
5.5.250.0030.08020.54
5.5.240.0270.06020.34
5.4.450.0370.03719.59
5.4.440.0200.03319.56
5.4.430.0270.03319.46
5.4.420.0170.05319.46
5.4.410.0070.05718.96
5.4.400.0200.05718.51
5.4.390.0100.05318.56
5.4.380.0100.06018.68
5.4.370.0070.05718.70
5.4.360.0130.04718.70
5.4.350.0100.03313.72
5.4.340.0100.04013.80
5.4.320.0070.04014.31
5.4.310.0070.04014.21
5.4.300.0100.03714.17
5.4.290.0170.04014.13
5.4.280.0100.04714.04
5.4.270.0130.03314.00
5.4.260.0130.04013.98
5.4.250.0130.03714.04
5.4.240.0170.03014.08
5.4.230.0130.03714.03
5.4.220.0030.04314.09
5.4.210.0070.04314.07
5.4.200.0070.04313.99
5.4.190.0070.04714.04
5.4.180.0100.04314.02
5.4.170.0130.04714.18
5.4.160.0030.04314.06
5.4.150.0070.04013.99
5.4.140.0100.03713.74
5.4.130.0230.02713.84
5.4.120.0130.04013.71
5.4.110.0100.03713.62
5.4.100.0100.03713.70
5.4.90.0070.04313.70
5.4.80.0070.04013.71
5.4.70.0170.03313.68
5.4.60.0100.03313.61
5.4.50.0070.03713.87
5.4.40.0030.04013.69
5.4.30.0100.03713.70
5.4.20.0130.03313.71
5.4.10.0130.03313.63
5.4.00.0030.04313.26
5.3.290.0170.03714.55
5.3.280.0070.04014.61
5.3.270.0100.04014.47
5.3.260.0130.03714.65
5.3.250.0030.04314.48
5.3.240.0170.03314.49
5.3.230.0130.03714.44
5.3.220.0130.04014.62
5.3.210.0130.03714.38
5.3.200.0130.03714.44
5.3.190.0100.04014.39
5.3.180.0170.03314.58
5.3.170.0100.03714.39
5.3.160.0130.03314.61
5.3.150.0030.04314.43
5.3.140.0070.04314.46
5.3.130.0200.03314.45
5.3.120.0200.05014.56
5.3.110.0070.04714.39
5.3.100.0100.04713.99
5.3.90.0200.02713.92
5.3.80.0130.03713.90
5.3.70.0100.04313.87
5.3.60.0130.03713.91
5.3.50.0070.04013.85
5.3.40.0130.03313.83
5.3.30.0070.03713.93
5.3.20.0070.04013.68
5.3.10.0070.03713.55
5.3.00.0100.03713.47
5.2.170.0000.03711.10
5.2.160.0070.03011.09
5.2.150.0170.02311.03
5.2.140.0070.03311.11
5.2.130.0030.03711.00
5.2.120.0130.02310.99
5.2.110.0070.03010.95
5.2.100.0100.03011.00
5.2.90.0070.03311.15
5.2.80.0030.03310.97
5.2.70.0200.02710.97
5.2.60.0100.03010.84
5.2.50.0070.03010.85
5.2.40.0100.02710.95
5.2.30.0030.03310.85
5.2.20.0070.03010.85
5.2.10.0000.03310.82
5.2.00.0070.03310.62
5.1.60.0000.03010.05
5.1.50.0100.0339.94
5.1.40.0070.0279.91
5.1.30.0170.02010.23
5.1.20.0030.03010.30
5.1.10.0100.0279.98
5.1.00.0100.02310.02
5.0.50.0030.0238.42
5.0.40.0000.0238.46
5.0.30.0030.0378.14
5.0.20.0000.0238.14
5.0.10.0100.0138.16
5.0.00.0100.0278.19
4.4.90.0000.0175.88
4.4.80.0030.0135.83
4.4.70.0030.0175.81
4.4.60.0030.0175.83
4.4.50.0070.0135.81
4.4.40.0070.0235.87
4.4.30.0100.0105.85
4.4.20.0100.0105.91
4.4.10.0000.0205.93
4.4.00.0030.0235.89
4.3.110.0070.0135.75
4.3.100.0030.0135.77
4.3.90.0070.0135.71
4.3.80.0030.0235.73
4.3.70.0000.0175.83
4.3.60.0070.0135.72
4.3.50.0030.0175.84
4.3.40.0070.0275.75
4.3.30.0000.0234.53
4.3.20.0000.0204.45
4.3.10.0030.0174.46
4.3.00.0030.01316.65

preferences:
71.94 ms | 400 KiB | 5 Q