3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo /*strtoupper(substr('index', 0, 1)) .*/ strtolower(substr('index', 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)
8.3.40.0150.00318.85
8.3.30.0140.00018.58
8.3.20.0080.00018.73
8.3.10.0030.00618.68
8.3.00.0030.00519.26
8.2.170.0090.00622.96
8.2.160.0080.00818.47
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0080.00026.16
8.2.120.0040.00420.63
8.2.110.0030.00621.10
8.2.100.0030.00917.53
8.2.90.0060.00618.97
8.2.80.0080.00017.97
8.2.70.0000.00817.46
8.2.60.0060.00317.80
8.2.50.0030.00517.80
8.2.40.0000.00719.94
8.2.30.0030.00617.68
8.2.20.0070.00717.43
8.2.10.0000.00717.45
8.2.00.0040.00817.46
8.1.270.0040.00423.99
8.1.260.0040.00426.35
8.1.250.0070.00028.09
8.1.240.0100.00023.80
8.1.230.0110.00017.77
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0000.00917.10
8.1.190.0040.00417.22
8.1.180.0030.00518.10
8.1.170.0000.00717.62
8.1.160.0000.00818.95
8.1.150.0050.00218.46
8.1.140.0050.00217.34
8.1.130.0030.00317.66
8.1.120.0080.00017.37
8.1.110.0020.00517.29
8.1.100.0000.00717.37
8.1.90.0040.00417.21
8.1.80.0030.00517.34
8.1.70.0070.00017.30
8.1.60.0030.00617.43
8.1.50.0040.00417.24
8.1.40.0050.00217.25
8.1.30.0000.00917.47
8.1.20.0070.00317.49
8.1.10.0070.00017.46
8.1.00.0070.00017.34
8.0.300.0040.00418.77
8.0.290.0070.00416.75
8.0.280.0070.00018.61
8.0.270.0000.00717.06
8.0.260.0000.00716.80
8.0.250.0000.00716.79
8.0.240.0040.00416.89
8.0.230.0080.00016.80
8.0.220.0030.00316.79
8.0.210.0030.00416.75
8.0.200.0020.00516.68
8.0.190.0040.00416.86
8.0.180.0000.01116.68
8.0.170.0040.00416.62
8.0.160.0000.00716.79
8.0.150.0080.00016.82
8.0.140.0000.01116.61
8.0.130.0030.00313.27
8.0.120.0000.00916.62
8.0.110.0000.00816.74
8.0.100.0030.00616.66
8.0.90.0050.00316.55
8.0.80.0070.01516.67
8.0.70.0000.00716.80
8.0.60.0040.00416.57
8.0.50.0080.00016.78
8.0.30.0110.00417.11
8.0.20.0120.00716.99
8.0.10.0040.00416.74
8.0.00.0140.00916.55
7.4.330.0050.00012.91
7.4.320.0060.00016.39
7.4.300.0000.00616.39
7.4.290.0000.00616.46
7.4.280.0060.00316.45
7.4.270.0000.00616.52
7.4.260.0030.00313.15
7.4.250.0080.00016.38
7.4.240.0000.00816.48
7.4.230.0070.00016.37
7.4.220.0150.00916.35
7.4.210.0060.00916.46
7.4.200.0070.00016.32
7.4.190.0030.00316.37
7.4.160.0120.00316.56
7.4.150.0110.00616.25
7.4.140.0110.00716.34
7.4.130.0090.00916.35
7.4.120.0060.01316.50
7.4.110.0070.01016.25
7.4.100.0090.00916.49
7.4.90.0090.00916.20
7.4.80.0100.00719.39
7.4.70.0070.01016.53
7.4.60.0130.00316.24
7.4.50.0060.00016.34
7.4.40.0070.00516.39
7.4.30.0090.00716.21
7.4.00.0000.01214.80
7.3.330.0000.00713.05
7.3.320.0030.00312.95
7.3.310.0000.00716.08
7.3.300.0030.00316.12
7.3.290.0040.00916.15
7.3.280.0120.00816.15
7.3.270.0090.01016.27
7.3.260.0210.01316.21
7.3.250.0080.01016.25
7.3.240.0030.01316.28
7.3.230.0130.00916.53
7.3.210.0140.00516.43
7.3.200.0120.00616.29
7.3.190.0090.01316.17
7.3.180.0120.00316.28
7.3.170.0070.01316.29
7.3.160.0000.01616.14
7.3.120.0040.01214.70
7.2.330.0080.00816.36
7.2.320.0150.00616.52
7.2.310.0070.01116.41
7.2.300.0070.01016.23
7.2.290.0040.01116.23
7.2.60.0070.00716.48
7.2.50.0030.01316.98
7.2.00.0060.00619.14
7.1.200.0030.00615.65
7.1.70.0060.00317.06
7.1.60.0100.01619.30
7.1.50.0100.01416.47
7.1.00.0030.03322.36
7.0.200.0060.00616.67
7.0.140.0030.07321.95
7.0.120.0030.07722.01
7.0.60.0330.07020.02
7.0.50.0030.05017.87
7.0.40.0300.07720.40
7.0.30.0400.07019.96
7.0.20.0230.04320.04
7.0.10.0300.07719.96
7.0.00.0230.04020.20
5.6.280.0030.07320.81
5.6.210.0030.03720.75
5.6.200.0130.06718.13
5.6.190.0370.07020.60
5.6.180.0370.07020.33
5.6.170.0270.08320.27
5.6.160.0270.03720.63
5.6.150.0300.08320.46
5.6.140.0230.05320.13
5.6.130.0230.05020.11
5.6.120.0330.07720.11
5.6.110.0270.04020.46
5.6.100.0300.05020.13
5.6.90.0330.04020.09
5.6.80.0470.05719.82
5.6.70.0370.06719.77
5.6.60.0270.05319.55
5.6.50.0230.04019.84
5.6.40.0200.05719.79
5.6.30.0300.05019.65
5.6.20.0300.08019.76
5.6.10.0230.07019.82
5.6.00.0370.05719.68
5.5.350.0100.08020.42
5.5.340.0170.07017.89
5.5.330.0300.06020.25
5.5.320.0300.05020.25
5.5.310.0230.04320.58
5.5.300.0270.05320.23
5.5.290.0300.04019.89
5.5.280.0230.04719.97
5.5.270.0270.05320.23
5.5.260.0300.05020.23
5.5.250.0230.06320.07
5.5.240.0330.07319.37
5.5.230.0330.05019.55
5.5.220.0300.05019.62
5.5.210.0270.04719.61
5.5.200.0230.05019.56
5.5.190.0300.04319.59
5.5.180.0270.04019.38
5.5.160.0330.06719.25
5.5.150.0300.06319.49
5.5.140.0300.06019.33
5.5.130.0200.04319.60
5.5.120.0200.04719.55
5.5.110.0270.07319.46
5.5.100.0300.04319.33
5.5.90.0330.07019.37
5.5.80.0270.04719.51
5.5.70.0270.04319.15
5.5.60.0300.06719.47
5.5.50.0330.07019.14
5.5.40.0270.07719.55
5.5.30.0330.07019.43
5.5.20.0330.07319.44
5.5.10.0300.07019.54
5.5.00.0330.07319.42
5.4.450.0370.05719.51
5.4.440.0230.04019.48
5.4.430.0270.03719.24
5.4.420.0300.07719.44
5.4.410.0300.06719.34
5.4.400.0330.06718.92
5.4.390.0400.06319.03
5.4.380.0300.07019.14
5.4.370.0300.07318.79
5.4.360.0330.05718.93
5.4.350.0330.06719.00
5.4.340.0300.04319.14
5.4.320.0400.05019.18
5.4.310.0270.03719.09
5.4.300.0370.05319.22
5.4.290.0230.04019.08
5.4.280.0300.04319.14
5.4.270.0270.03718.79
5.4.260.0300.05719.08
5.4.250.0270.04719.14
5.4.240.0200.05019.14
5.4.230.0370.05319.11
5.4.220.0270.07719.18
5.4.210.0330.07319.07
5.4.200.0470.03019.19
5.4.190.0330.07319.13
5.4.180.0330.06319.07
5.4.170.0300.07319.08
5.4.160.0330.07018.89
5.4.150.0270.04019.06
5.4.140.0270.05716.37
5.4.130.0330.06016.36
5.4.120.0400.05716.27
5.4.110.0370.06016.23
5.4.100.0230.03716.15
5.4.90.0270.07016.46
5.4.80.0300.07016.39
5.4.70.0270.04316.33
5.4.60.0270.04316.23
5.4.50.0230.05016.34
5.4.40.0400.06016.32
5.4.30.0300.04016.32
5.4.20.0270.04016.30
5.4.10.0330.06016.36
5.4.00.0230.04315.73
5.3.290.0270.03714.61
5.3.280.0300.05014.41
5.3.270.0330.05314.61
5.3.260.0270.04014.54
5.3.250.0200.04014.53
5.3.240.0300.07014.52
5.3.230.0300.07314.53
5.3.220.0230.04314.44
5.3.210.0170.04314.51
5.3.200.0430.05714.54
5.3.190.0300.04314.48
5.3.180.0370.05714.44
5.3.170.0270.07014.50
5.3.160.0300.05714.52
5.3.150.0300.06714.50
5.3.140.0330.06714.43
5.3.130.0400.06014.46
5.3.120.0300.07314.47
5.3.110.0230.07714.47
5.3.100.0400.06713.95
5.3.90.0200.04013.94
5.3.80.0300.03313.95
5.3.70.0300.06713.94
5.3.60.0270.06713.92
5.3.50.0400.06313.76
5.3.40.0530.03313.73
5.3.30.0330.06313.87
5.3.20.0300.04313.52
5.3.10.0200.05013.57
5.3.00.0200.04313.73
5.2.170.0230.03312.66
5.2.160.0400.03712.66
5.2.150.0300.05712.66
5.2.140.0200.05012.66
5.2.130.0270.05312.66
5.2.120.0230.04712.66
5.2.110.0230.06012.66
5.2.100.0270.06012.66
5.2.90.0170.04712.66
5.2.80.0270.05312.66
5.2.70.0270.03712.66
5.2.60.0300.05712.66
5.2.50.0270.05712.66
5.2.40.0330.04712.66
5.2.30.0200.04312.66
5.2.20.0270.02712.66
5.2.10.0230.05312.66
5.2.00.0330.05712.66
5.1.60.0170.02712.66
5.1.50.0130.03312.66
5.1.40.0230.02312.66
5.1.30.0170.02712.66
5.1.20.0170.05712.66
5.1.10.0170.05712.66
5.1.00.0170.03712.66
5.0.50.0130.02312.66
5.0.40.0070.02012.66
5.0.30.0170.03312.66
5.0.20.0300.01012.66
5.0.10.0170.02312.66
5.0.00.0130.05312.66
4.4.90.0100.01712.66
4.4.80.0070.01712.66
4.4.70.0100.01312.66
4.4.60.0130.01312.66
4.4.50.0100.01712.66
4.4.40.0070.02712.66
4.4.30.0030.02012.66
4.4.20.0130.02312.66
4.4.10.0070.02712.66
4.4.00.0030.03012.66
4.3.110.0070.01712.66
4.3.100.0170.01312.66
4.3.90.0130.03012.66
4.3.80.0100.02712.66
4.3.70.0070.02012.66
4.3.60.0070.02012.66
4.3.50.0100.02012.66
4.3.40.0170.02312.66
4.3.30.0070.02012.66
4.3.20.0030.02712.66
4.3.10.0100.02312.66
4.3.00.0100.02712.66

preferences:
48.76 ms | 400 KiB | 5 Q