3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "abcdefghijklmnopqrstuvwxyz"; echo !mb_check_encoding($string, 'ASCII');

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)
8.3.60.0060.01218.43
8.3.50.0030.01416.36
8.3.40.0150.00618.80
8.3.30.0100.00318.84
8.3.20.0070.00020.21
8.3.10.0040.00423.64
8.3.00.0040.00423.66
8.2.180.0130.01018.51
8.2.170.0110.00422.96
8.2.160.0070.01022.26
8.2.150.0000.00824.18
8.2.140.0070.00024.66
8.2.130.0040.00426.16
8.2.120.0090.00017.38
8.2.110.0160.00321.03
8.2.100.0060.00617.63
8.2.90.0040.00419.05
8.2.80.0050.00317.97
8.2.70.0040.00417.63
8.2.60.0030.00617.80
8.2.50.0040.00418.07
8.2.40.0040.00420.94
8.2.30.0000.00718.10
8.2.20.0070.00017.78
8.2.10.0080.00017.93
8.2.00.0070.00018.04
8.1.280.0070.01125.92
8.1.270.0040.00420.33
8.1.260.0080.00026.35
8.1.250.0050.00228.09
8.1.240.0090.00022.74
8.1.230.0090.00317.42
8.1.220.0000.00717.74
8.1.210.0000.00818.77
8.1.200.0030.00717.36
8.1.190.0060.00317.22
8.1.180.0000.00818.10
8.1.170.0000.00818.52
8.1.160.0040.00422.00
8.1.150.0030.00618.97
8.1.140.0040.00417.39
8.1.130.0000.00717.73
8.1.120.0040.00417.45
8.1.110.0050.00317.48
8.1.100.0070.00017.35
8.1.90.0040.00417.48
8.1.80.0050.00217.46
8.1.70.0050.00217.47
8.1.60.0000.00917.44
8.1.50.0030.00617.41
8.1.40.0040.00417.49
8.1.30.0000.00817.64
8.1.20.0040.00417.58
8.1.10.0000.00717.47
8.1.00.0080.00017.38
8.0.300.0000.00718.77
8.0.290.0070.00016.75
8.0.280.0000.00718.36
8.0.270.0070.00017.16
8.0.260.0030.00317.23
8.0.250.0040.00416.88
8.0.240.0030.00316.96
8.0.230.0040.00417.00
8.0.220.0000.00616.93
8.0.210.0070.00016.89
8.0.200.0000.00616.92
8.0.190.0000.00717.03
8.0.180.0000.00716.93
8.0.170.0040.00416.95
8.0.160.0000.00716.84
8.0.150.0030.00516.98
8.0.140.0050.00316.89
8.0.130.0000.00713.36
8.0.120.0000.00816.90
8.0.110.0050.00216.88
8.0.100.0000.00816.93
8.0.90.0050.00516.89
8.0.80.0030.01416.94
8.0.70.0000.00716.96
8.0.60.0000.00716.82
8.0.50.0070.00016.93
8.0.30.0070.01216.94
8.0.20.0150.00517.40
8.0.10.0000.00717.10
8.0.00.0040.01416.81
7.4.330.0060.00015.08
7.4.320.0000.00616.48
7.4.300.0060.00016.48
7.4.290.0030.00316.64
7.4.280.0030.00616.57
7.4.270.0000.00616.59
7.4.260.0000.00716.54
7.4.250.0080.00016.29
7.4.240.0030.00316.41
7.4.230.0000.00716.61
7.4.220.0100.00716.46
7.4.210.0120.00316.55
7.4.200.0000.00716.63
7.4.160.0190.00016.32
7.4.150.0090.00917.40
7.4.140.0100.00717.86
7.4.130.0120.00616.54
7.4.120.0120.00616.58
7.4.110.0070.01016.49
7.4.100.0120.00616.55
7.4.90.0030.01516.60
7.4.80.0070.01019.39
7.4.70.0090.00916.34
7.4.60.0120.00916.31
7.4.50.0080.00016.27
7.4.40.0130.00316.25
7.4.30.0100.00716.50
7.4.00.0030.01015.15
7.3.330.0000.00513.10
7.3.320.0030.00313.08
7.3.310.0040.00416.15
7.3.300.0040.00416.03
7.3.290.0090.00916.20
7.3.280.0110.00816.25
7.3.270.0050.01117.40
7.3.260.0140.00616.42
7.3.250.0120.00616.34
7.3.240.0040.01416.39
7.3.230.0100.00716.39
7.3.210.0090.01416.36
7.3.200.0090.00616.27
7.3.190.0030.01216.20
7.3.180.0060.00916.41
7.3.170.0090.01216.36
7.3.160.0150.00716.19
7.2.330.0100.00716.36
7.2.320.0070.01116.36
7.2.310.0170.00016.55
7.2.300.0060.00916.36
7.2.290.0070.01116.41
7.2.60.0040.01116.96
7.2.00.0040.00819.14
7.1.200.0030.00615.72
7.1.100.0060.00618.24
7.1.70.0000.01116.77
7.1.60.0130.01019.42
7.1.50.0070.01016.90
7.1.00.0030.07322.36
7.0.200.0040.00714.70
7.0.60.0030.04019.85
7.0.50.0130.07317.91
7.0.40.0100.07720.07
7.0.30.0300.08020.13
7.0.20.0270.04320.12
7.0.10.0130.08020.30
7.0.00.0030.04320.19
5.6.280.0030.06720.98
5.6.210.0070.06020.46
5.6.200.0100.07318.19
5.6.190.0030.06020.61
5.6.180.0270.05020.56
5.6.170.0300.03720.51
5.6.160.0130.07320.61
5.6.150.0030.07718.21
5.6.140.0030.04718.12
5.6.130.0130.08018.07
5.6.120.0000.05021.01
5.6.110.0030.04020.95
5.6.100.0030.08720.87
5.6.90.0130.07021.09
5.6.80.0130.07720.37
5.5.350.0000.08020.41
5.5.340.0100.07718.01
5.5.330.0000.05320.46
5.5.320.0030.07720.28
5.5.310.0230.08320.32
5.5.300.0100.05717.88
5.5.290.0030.05717.97
5.5.280.0070.06720.89
5.5.270.0030.07720.85
5.5.260.0030.04020.71
5.5.250.0000.04720.68
5.5.240.0030.06720.03
5.4.450.0670.06719.10
5.4.440.0570.06319.24
5.4.430.0570.07019.23
5.4.420.0670.05319.51
5.4.410.0700.06719.31
5.4.400.0600.05319.30
5.4.390.0630.06319.12
5.4.380.0870.04319.07
5.4.370.0830.04319.15
5.4.360.0800.05319.25
5.4.350.0730.06018.78
5.4.340.0770.05019.26
5.4.320.0770.05019.26
5.4.310.0570.05719.19
5.4.300.0700.06019.24
5.4.290.0970.04718.91
5.4.280.0770.05318.77
5.4.270.0870.04019.27
5.4.260.0770.05019.29
5.4.250.0530.05718.94
5.4.240.0670.05019.18
5.4.230.0630.04719.21
5.4.220.0770.05319.14
5.4.210.0630.05319.24
5.4.200.0530.04716.98
5.4.190.0030.06019.27
5.4.180.0030.06018.93
5.4.170.0330.05019.22
5.4.160.0800.04318.85
5.4.150.0800.04718.89
5.4.140.0700.06016.43
5.4.130.0670.04016.27
5.4.120.0300.06316.24
5.4.110.0100.05716.44
5.4.100.0170.04716.21
5.4.90.0500.05316.37
5.4.80.0470.06016.23
5.4.70.0200.04016.45
5.4.60.0100.04716.28
5.4.50.0500.04716.22
5.4.40.0500.05016.24
5.4.30.0100.04716.46
5.4.20.0230.03716.13
5.4.10.0300.05316.42
5.4.00.0570.06015.82
5.3.290.0430.06014.60
5.3.280.0530.05314.45
5.3.270.0700.05714.43
5.3.260.0770.05314.61
5.3.250.0700.05314.58
5.3.240.0530.05714.43
5.3.230.0800.05014.45
5.3.220.0630.05314.57
5.3.210.0600.06014.44
5.3.200.0570.05714.39
5.3.190.0600.05714.56
5.3.180.0630.05714.35
5.3.170.0730.04714.40
5.3.160.0700.05314.52
5.3.150.0730.04714.49
5.3.140.0770.06314.56
5.3.130.0930.05314.52
5.3.120.0700.06014.55
5.3.110.0700.06014.33
5.3.100.0830.05014.02
5.3.90.0670.05013.88
5.3.80.0900.03714.00
5.3.70.0830.03713.81
5.3.60.0670.05313.95
5.3.50.0570.06013.78
5.3.40.0670.05313.88
5.3.30.0770.04713.75
5.3.20.0700.05313.68
5.3.10.0870.05013.54
5.3.00.0670.05313.48
5.2.170.0500.05011.22
5.2.160.0770.04010.98
5.2.150.0530.04711.08
5.2.140.0700.04311.16
5.2.130.0600.04311.15
5.2.120.0430.04011.12
5.2.110.0630.03310.94
5.2.100.0630.06011.04
5.2.90.0700.06710.94
5.2.80.0630.04310.95
5.2.70.0700.04011.14
5.2.60.0570.04311.20
5.2.50.0630.04010.85
5.2.40.0430.04710.93
5.2.30.0430.04010.85
5.2.20.0570.05010.84
5.2.10.0470.04710.89
5.2.00.0400.04310.80
5.1.60.0230.04310.07
5.1.50.0470.0479.85
5.1.40.0430.0309.85
5.1.30.0300.04310.41
5.1.20.0470.04010.36
5.1.10.0530.04010.12
5.1.00.0670.0439.95
5.0.50.0370.0308.38
5.0.40.0270.0338.38
5.0.30.0300.0508.24
5.0.20.0270.0378.20
5.0.10.0230.0408.16
5.0.00.0300.0438.04
4.4.90.0170.0275.87
4.4.80.0270.0235.81
4.4.70.0200.0205.73
4.4.60.0170.0275.85
4.4.50.0370.0175.76
4.4.40.0170.0405.80
4.4.30.0100.0275.75
4.4.20.0270.0275.88
4.4.10.0270.0305.89
4.4.00.0100.0475.84
4.3.110.0230.0335.73
4.3.100.0100.0275.66
4.3.90.0230.0205.79
4.3.80.0230.0375.77
4.3.70.0170.0205.66
4.3.60.0230.0235.82
4.3.50.0200.0175.70
4.3.40.0300.0335.66
4.3.30.0130.0274.46
4.3.20.0070.0274.48
4.3.10.0070.0274.40
4.3.00.0100.0237.11

preferences:
63.28 ms | 400 KiB | 5 Q