3v4l.org

run code in 500+ PHP versions simultaneously
<?php $string = 'Čovjek'; echo substr(strtolower($string), 0, 1);

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)
8.5.30.0090.00920.27
8.5.20.0090.00820.05
8.5.10.0110.00920.27
8.5.00.0120.00921.59
8.4.180.0110.01020.66
8.4.170.0110.01121.88
8.4.160.0110.01122.10
8.4.150.0070.00516.79
8.4.140.0130.00817.63
8.4.130.0130.00719.02
8.4.120.0090.01019.36
8.4.110.0110.00922.34
8.4.100.0110.00817.67
8.4.90.0140.00520.51
8.4.80.0150.00518.66
8.4.70.0150.00519.45
8.4.60.0170.00318.70
8.4.50.0150.00718.56
8.4.40.0130.00619.50
8.4.30.0000.01917.71
8.4.20.0100.01019.38
8.4.10.0180.00419.29
8.3.300.0070.00518.27
8.3.290.0090.01220.80
8.3.280.0120.00818.21
8.3.270.0130.01216.51
8.3.260.0030.00516.35
8.3.250.0100.00816.25
8.3.240.0050.00516.39
8.3.230.0060.00316.72
8.3.220.0100.00818.92
8.3.210.0090.01116.45
8.3.200.0050.00416.63
8.3.190.0120.00716.91
8.3.180.0160.00317.27
8.3.170.0150.00320.48
8.3.160.0120.00917.17
8.3.150.0110.00716.96
8.3.140.0090.00918.43
8.3.130.0060.00316.64
8.3.120.0040.01118.57
8.3.110.0090.00616.57
8.3.100.0070.00724.06
8.3.90.0080.00026.77
8.3.80.0090.00017.97
8.3.70.0180.00018.18
8.3.60.0060.00918.26
8.3.50.0130.00521.89
8.3.40.0120.00618.71
8.3.30.0100.00318.42
8.3.20.0030.00518.65
8.3.10.0050.00321.74
8.3.00.0080.00021.77
8.2.300.0110.00920.13
8.2.290.0070.01016.38
8.2.280.0060.00218.41
8.2.270.0140.00619.05
8.2.260.0040.01516.58
8.2.250.0000.00818.33
8.2.240.0070.01117.32
8.2.230.0030.01320.94
8.2.220.0110.00037.54
8.2.210.0090.00626.77
8.2.200.0040.00416.75
8.2.190.0120.00316.63
8.2.180.0070.01118.41
8.2.170.0150.00022.96
8.2.160.0040.01220.44
8.2.150.0040.00424.18
8.2.140.0000.00724.66
8.2.130.0080.00022.16
8.2.120.0040.00426.35
8.2.110.0060.00619.45
8.2.100.0040.00818.05
8.2.90.0040.00817.50
8.2.80.0030.00617.97
8.2.70.0070.00318.04
8.2.60.0100.00319.07
8.2.50.0060.00318.10
8.2.40.0020.00520.60
8.2.30.0040.00421.08
8.2.20.0070.00018.12
8.2.10.0070.00018.09
8.2.00.0050.00217.61
8.1.340.0100.01120.30
8.1.330.0110.00715.89
8.1.320.0090.01016.05
8.1.310.0150.00316.66
8.1.300.0040.00418.29
8.1.290.0030.00630.84
8.1.280.0110.00425.92
8.1.270.0030.00523.71
8.1.260.0050.00328.09
8.1.250.0000.00728.09
8.1.240.0060.00617.36
8.1.230.0070.00317.70
8.1.220.0000.00817.74
8.1.210.0050.00318.77
8.1.200.0000.01017.23
8.1.190.0090.00317.09
8.1.180.0080.00318.45
8.1.170.0000.00718.52
8.1.160.0040.00423.95
8.1.150.0070.00018.72
8.1.140.0040.00419.45
8.1.130.0030.00317.57
8.1.120.0000.00717.33
8.1.110.0000.00817.37
8.1.100.0040.00417.30
8.1.90.0000.00717.35
8.1.80.0000.00717.42
8.1.70.0000.00717.27
8.1.60.0000.00717.43
8.1.50.0060.00317.50
8.1.40.0100.00017.47
8.1.30.0040.00417.54
8.1.20.0040.00417.50
8.1.10.0050.00317.37
8.1.00.0050.00317.41
8.0.300.0070.00318.77
8.0.290.0080.00016.75
8.0.280.0000.00718.43
8.0.270.0000.00717.09
8.0.260.0080.00017.28
8.0.250.0070.00016.92
8.0.240.0040.00416.96
8.0.230.0020.00516.86
8.0.220.0070.00016.84
8.0.210.0000.00616.70
8.0.200.0000.00716.96
8.0.190.0040.00416.91
8.0.180.0080.00016.84
8.0.170.0060.00316.73
8.0.160.0070.00016.84
8.0.150.0050.00316.76
8.0.140.0000.00716.83
8.0.130.0000.00713.19
8.0.120.0030.00516.72
8.0.110.0070.00016.68
8.0.100.0040.00416.86
8.0.90.0000.00716.70
8.0.80.0100.01016.72
8.0.70.0000.00816.86
8.0.60.0030.00516.83
8.0.50.0000.00816.61
8.0.30.0050.01517.11
8.0.20.0100.00917.40
8.0.10.0000.00716.84
8.0.00.0160.00816.77
7.4.330.0050.00315.55
7.4.320.0030.00316.52
7.4.300.0000.00616.52
7.4.290.0070.00016.43
7.4.280.0000.00716.50
7.4.270.0030.00316.38
7.4.260.0000.00716.43
7.4.250.0000.00816.38
7.4.240.0070.00016.45
7.4.230.0030.00316.41
7.4.220.0130.01016.41
7.4.210.0070.00716.46
7.4.200.0030.00316.17
7.4.160.0110.00616.57
7.4.150.0130.01017.40
7.4.140.0090.00817.86
7.4.130.0090.00916.41
7.4.120.0130.00516.42
7.4.110.0160.00716.57
7.4.100.0110.00716.33
7.4.90.0030.01516.47
7.4.80.0070.01016.27
7.4.70.0070.01116.41
7.4.60.0120.00316.41
7.4.50.0030.01016.25
7.4.40.0110.00616.29
7.4.30.0110.01116.30
7.4.00.0110.00414.62
7.3.330.0030.00312.98
7.3.320.0050.00012.93
7.3.310.0000.00816.00
7.3.300.0040.00416.04
7.3.290.0110.00616.16
7.3.280.0090.00916.10
7.3.270.0100.00617.40
7.3.260.0120.00516.13
7.3.250.0110.00616.38
7.3.240.0060.01316.21
7.3.230.0170.00316.39
7.3.210.0120.00916.20
7.3.200.0110.00619.39
7.3.190.0080.00816.29
7.3.180.0060.01116.44
7.3.170.0060.01216.16
7.3.160.0100.01016.10
7.2.330.0030.01416.39
7.2.320.0100.00616.51
7.2.310.0100.01016.49
7.2.300.0060.01516.30
7.2.290.0130.00816.59
7.2.00.0040.01119.29
7.1.70.0050.00316.75
7.1.60.0090.00317.21
7.1.00.0070.07322.35
7.0.200.0110.00814.91
7.0.120.2270.05720.24
7.0.110.1630.06020.24
7.0.100.0500.07720.26
7.0.90.0370.05320.28
7.0.80.0270.06320.27
7.0.70.0470.05720.38
7.0.60.0400.06720.35
7.0.50.0200.07320.36
7.0.40.0200.06320.35
7.0.30.0230.06020.24
7.0.20.0370.05020.34
7.0.10.0270.05720.29
7.0.00.0400.04320.25
5.6.270.0130.05321.03
5.6.260.0130.05721.05
5.6.250.0130.06720.88
5.6.240.0100.06020.93
5.6.230.0170.07321.02
5.6.220.0170.07020.83
5.6.210.0230.06320.93
5.6.200.0100.08721.02
5.6.190.0230.05020.85
5.6.180.0170.05321.06
5.6.170.0030.06320.75
5.6.160.0200.05020.92
5.6.150.0100.07720.91
5.6.140.0270.06020.79
5.6.130.0070.06720.95
5.6.120.0130.06721.07
5.6.110.0200.08321.02
5.6.100.0100.07020.97
5.6.90.0170.05321.04
5.6.80.0130.06020.46
5.6.70.0100.07020.22
5.6.60.0100.07320.22
5.6.50.0170.06320.30
5.6.40.0030.07720.26
5.6.30.0300.05320.36
5.6.20.0130.06720.29
5.6.10.0100.06320.18
5.6.00.0070.06020.34

preferences:
46.57 ms | 1485 KiB | 5 Q