3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( substr('abc', 3, 0) , substr('abc', 2, 0) );

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)
8.3.60.0150.00018.43
8.3.50.0170.00721.02
8.3.40.0070.00718.45
8.3.30.0100.00320.17
8.3.20.0070.00020.16
8.3.10.0040.00421.98
8.3.00.0080.00022.50
8.2.180.0070.01116.32
8.2.170.0090.01222.96
8.2.160.0040.01121.99
8.2.150.0050.00324.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0040.00420.75
8.2.110.0030.00620.36
8.2.100.0120.00017.78
8.2.90.0030.00618.97
8.2.80.0040.00419.39
8.2.70.0030.00617.50
8.2.60.0000.00917.68
8.2.50.0000.00818.07
8.2.40.0000.00918.21
8.2.30.0000.00719.49
8.2.20.0000.00717.44
8.2.10.0000.00717.43
8.2.00.0040.00417.45
8.1.280.0090.00925.92
8.1.270.0040.00423.99
8.1.260.0090.00026.35
8.1.250.0050.00328.09
8.1.240.0070.00322.01
8.1.230.0070.00420.88
8.1.220.0060.00317.74
8.1.210.0000.00918.77
8.1.200.0040.00417.10
8.1.190.0000.00817.28
8.1.180.0040.00418.10
8.1.170.0000.00818.34
8.1.160.0000.00718.70
8.1.150.0000.00818.49
8.1.140.0030.00517.30
8.1.130.0000.00717.76
8.1.120.0000.00717.32
8.1.110.0040.00417.24
8.1.100.0000.00817.36
8.1.90.0080.00017.28
8.1.80.0000.00717.24
8.1.70.0030.00317.20
8.1.60.0040.00417.46
8.1.50.0040.00417.25
8.1.40.0030.00617.35
8.1.30.0040.00417.39
8.1.20.0060.00317.42
8.1.10.0000.00817.39
8.1.00.0050.00217.30
8.0.300.0070.00018.77
8.0.290.0000.00716.92
8.0.280.0000.00718.32
8.0.270.0000.00717.10
8.0.260.0050.00316.58
8.0.250.0070.00016.71
8.0.240.0000.00716.89
8.0.230.0030.00316.84
8.0.220.0000.00716.70
8.0.210.0040.00416.65
8.0.200.0050.00216.67
8.0.190.0080.00016.74
8.0.180.0000.00716.73
8.0.170.0040.00416.63
8.0.160.0000.00716.67
8.0.150.0000.00716.62
8.0.140.0040.00416.75
8.0.130.0000.00713.21
8.0.120.0070.00016.61
8.0.110.0070.00016.64
8.0.100.0040.00416.81
8.0.90.0050.00216.60
8.0.80.0140.00316.70
8.0.70.0000.00716.80
8.0.60.0030.00516.64
8.0.50.0000.00816.78
8.0.30.0140.00616.74
8.0.20.0090.00917.40
8.0.10.0040.00416.89
8.0.00.0080.01016.60
7.4.330.0030.00316.84
7.4.320.0000.00716.36
7.4.300.0060.00016.44
7.4.290.0050.00216.40
7.4.280.0030.00316.35
7.4.270.0000.00716.43
7.4.260.0000.00613.11
7.4.250.0050.00316.42
7.4.240.0000.00716.33
7.4.230.0000.00716.25
7.4.220.0030.01416.49
7.4.210.0100.00716.38
7.4.200.0030.00316.34
7.4.190.0070.00016.63
7.4.160.0090.00916.24
7.4.150.0120.00417.40
7.4.140.0110.00517.86
7.4.130.0100.00816.31
7.4.120.0110.00516.35
7.4.110.0110.00516.34
7.4.100.0140.00316.40
7.4.90.0100.00716.36
7.4.80.0090.00919.39
7.4.70.0110.00516.46
7.4.60.0150.00616.24
7.4.50.0060.00316.40
7.4.40.0030.00822.77
7.4.30.0060.01316.43
7.4.00.0060.00914.63
7.3.330.0030.00312.86
7.3.320.0000.00513.06
7.3.310.0030.00316.12
7.3.300.0030.00315.99
7.3.290.0030.01316.07
7.3.280.0090.00716.15
7.3.270.0100.00717.40
7.3.260.0120.01218.24
7.3.250.0080.00816.08
7.3.240.0090.00616.36
7.3.230.0030.02016.42
7.3.210.0100.00616.21
7.3.200.0030.01519.39
7.3.190.0060.01116.28
7.3.180.0090.01216.19
7.3.170.0120.00316.27
7.3.160.0090.01216.37
7.3.120.0090.00614.67
7.2.330.0060.01216.27
7.2.320.0060.01216.28
7.2.310.0030.01516.26
7.2.300.0060.00916.47
7.2.290.0060.01016.23
7.2.60.0060.00616.74
7.1.200.0060.00915.68
7.1.70.0090.00617.17
7.1.60.0070.01419.17
7.1.50.0070.01016.76
7.1.00.0100.07022.28
7.0.200.0000.00816.76
7.0.140.0030.06722.21
7.0.100.0630.07019.93
7.0.90.0300.08320.00
7.0.80.0630.07319.81
7.0.70.0530.07719.83
7.0.60.0600.07319.94
7.0.50.0570.08320.22
7.0.40.0030.08019.99
7.0.30.0170.07020.11
7.0.20.0100.07720.00
7.0.10.0100.06020.18
7.0.00.0170.08020.02
5.6.280.0030.07320.85
5.6.250.0100.07720.59
5.6.240.0230.06720.72
5.6.230.0030.08320.58
5.6.220.0000.08320.59
5.6.210.0100.08020.74
5.6.200.0030.08320.95
5.6.190.0100.08320.98
5.6.180.0130.07321.03
5.6.170.0070.08321.02
5.6.160.0070.08021.07
5.6.150.0100.04321.05
5.6.140.0100.07721.09
5.6.130.0130.06721.07
5.6.120.0100.08021.03
5.6.110.0070.07720.99
5.6.100.0100.08021.00
5.6.90.0030.04321.02
5.6.80.0030.03720.48
5.6.70.0000.04720.46
5.6.60.0070.03320.30
5.6.50.0070.03720.41
5.6.40.0070.04320.52
5.6.30.0070.07320.32
5.6.20.0000.04020.31
5.6.10.0100.07320.38
5.6.00.0070.07720.45
5.5.380.0100.07720.35
5.5.370.0130.08020.49
5.5.360.0030.09020.40
5.5.350.0100.07020.44
5.5.340.0070.08320.80
5.5.330.0130.07720.79
5.5.320.0200.07020.80
5.5.310.0230.06320.89
5.5.300.0100.07020.89
5.5.290.0070.08320.77
5.5.280.0030.08320.63
5.5.270.0170.07320.81
5.5.260.0070.08320.75
5.5.250.0030.08020.61
5.5.240.0070.03720.20
5.5.230.0130.04720.29
5.5.220.0000.04720.10
5.5.210.0000.04320.20
5.5.200.0000.04720.28
5.5.190.0070.07320.20
5.5.180.0070.07720.22
5.5.160.0030.07020.12
5.5.150.0000.04020.07
5.5.140.0000.04020.14
5.5.130.0030.04020.15
5.5.120.0030.03719.97
5.5.110.0070.04320.24
5.5.100.0070.04720.04
5.5.90.0070.03320.11
5.5.80.0030.04319.97
5.5.70.0030.04320.05
5.5.60.0030.08020.03
5.5.50.0000.04020.04
5.5.40.0030.03720.14
5.5.30.0000.04320.04
5.5.20.0070.05020.13
5.5.10.0000.04320.09
5.5.00.0070.03720.04
5.4.450.0070.07719.36
5.4.440.0070.08319.36
5.4.430.0100.06319.55
5.4.420.0130.07319.29
5.4.410.0030.07019.23
5.4.400.0000.04318.79
5.4.390.0070.03018.97
5.4.380.0030.03719.07
5.4.370.0070.04319.03
5.4.360.0030.04319.06
5.4.350.0030.05318.91
5.4.340.0030.08019.03
5.4.320.0070.03719.13
5.4.310.0000.06019.07
5.4.300.0100.03019.09
5.4.290.0000.05019.03
5.4.280.0030.03718.97
5.4.270.0000.04718.96
5.4.260.0000.07719.08
5.4.250.0030.05318.80
5.4.240.0030.03718.80
5.4.230.0100.03318.80
5.4.220.0030.03718.91
5.4.210.0000.04319.02
5.4.200.0000.04019.11
5.4.190.0100.03019.21
5.4.180.0070.04018.77
5.4.170.0000.04019.14
5.4.160.0000.04018.95
5.4.150.0030.03718.89
5.4.140.0070.04716.32
5.4.130.0000.04016.27
5.4.120.0000.03716.07
5.4.110.0070.03316.34
5.4.100.0000.04016.44
5.4.90.0000.03716.20
5.4.80.0030.04316.29
5.4.70.0030.03316.34
5.4.60.0070.03316.32
5.4.50.0100.07016.41
5.4.40.0100.06716.43
5.4.30.0100.07316.18
5.4.20.0070.07716.41
5.4.10.0130.07316.30
5.4.00.0130.06715.77
5.3.290.0070.03314.51
5.3.280.0070.05714.45
5.3.270.0030.03314.42
5.3.260.0100.04314.59
5.3.250.0070.03314.61
5.3.240.0100.04014.51
5.3.230.0100.03014.58
5.3.220.0000.04014.50
5.3.210.0000.04014.54
5.3.200.0000.04014.55
5.3.190.0070.03314.41
5.3.180.0030.05014.41
5.3.170.0030.03314.38
5.3.160.0100.07014.54
5.3.150.0130.07014.50
5.3.140.0070.04314.49
5.3.130.0000.05714.41
5.3.120.0130.07314.46
5.3.110.0030.05014.54
5.3.100.0030.04714.04
5.3.90.0130.06313.99
5.3.80.0100.04013.92
5.3.70.0030.07713.87
5.3.60.0030.07014.00
5.3.50.0070.06313.93
5.3.40.0100.06713.95
5.3.30.0030.07313.91
5.3.20.0000.08313.60
5.3.10.0000.07013.50
5.3.00.0070.07013.49
5.2.170.0070.05711.00
5.2.160.0070.05711.13
5.2.150.0070.04711.21
5.2.140.0030.06311.13
5.2.130.0030.06310.94
5.2.120.0000.07010.94
5.2.110.0070.06011.08
5.2.100.0100.03710.89
5.2.90.0070.06311.14
5.2.80.0100.05710.95
5.2.70.0100.06010.93
5.2.60.0070.06011.04
5.2.50.0030.03711.01
5.2.40.0070.04710.86
5.2.30.0100.05710.79
5.2.20.0130.05010.92
5.2.10.0030.06310.93
5.2.00.0100.03010.75
5.1.60.0100.04710.01
5.1.50.0070.0509.99
5.1.40.0170.04010.02
5.1.30.0030.05310.40
5.1.20.0070.05710.39
5.1.10.0070.05310.12
5.1.00.0070.04010.06
5.0.50.0070.0438.96
5.0.40.0030.0438.96
5.0.30.0030.0678.96
5.0.20.0030.0438.96
5.0.10.0030.0378.96
5.0.00.0030.0608.96
4.4.90.0070.0278.96
4.4.80.0100.0308.96
4.4.70.0030.0338.96
4.4.60.0100.0108.96
4.4.50.0030.0308.96
4.4.40.0030.0438.96
4.4.30.0030.0378.96
4.4.20.0030.0338.96
4.4.10.0030.0378.96
4.4.00.0030.0508.96
4.3.110.0000.0338.96
4.3.100.0070.0308.96
4.3.90.0070.0278.96
4.3.80.0070.0508.96
4.3.70.0100.0278.96
4.3.60.0000.0408.96
4.3.50.0030.0278.96
4.3.40.0030.0478.96
4.3.30.0070.0308.96
4.3.20.0030.0338.96
4.3.10.0030.0338.96
4.3.00.0000.0378.96

preferences:
38.45 ms | 401 KiB | 5 Q