3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = 'u4F60u597Du4E16u754C'; $string = json_decode('"' . $string . '"'); $valid = mb_check_encoding($string, 'UTF-8'); echo ($valid) ? 'valid' : 'invalid'; ?>

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)
8.3.70.0080.00816.63
8.3.60.0120.00918.43
8.3.50.0150.00521.16
8.3.40.0110.00318.58
8.3.30.0060.00918.40
8.3.20.0040.00420.16
8.3.10.0080.00023.42
8.3.00.0090.00019.54
8.2.190.0120.00316.58
8.2.180.0090.00918.41
8.2.170.0100.00322.96
8.2.160.0160.00320.37
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0120.00626.16
8.2.120.0050.00517.50
8.2.110.0040.00422.06
8.2.100.0000.01219.36
8.2.90.0050.00318.98
8.2.80.0000.00817.97
8.2.70.0040.00417.63
8.2.60.0030.00618.03
8.2.50.0080.00018.07
8.2.40.0030.00519.33
8.2.30.0040.00419.82
8.2.20.0020.00517.67
8.2.10.0040.00418.04
8.2.00.0040.00418.11
8.1.280.0070.01125.92
8.1.270.0110.00720.38
8.1.260.0060.00326.35
8.1.250.0070.00428.09
8.1.240.0000.00822.53
8.1.230.0080.00417.42
8.1.220.0050.00217.74
8.1.210.0040.00418.77
8.1.200.0050.00517.23
8.1.190.0050.00317.23
8.1.180.0040.00418.10
8.1.170.0040.00418.59
8.1.160.0070.00022.13
8.1.150.0000.00718.86
8.1.140.0110.00017.38
8.1.130.0080.00017.76
8.1.120.0070.00017.43
8.1.110.0050.00317.50
8.1.100.0000.00717.44
8.1.90.0070.00017.42
8.1.80.0000.00717.51
8.1.70.0070.00017.37
8.1.60.0030.00617.70
8.1.50.0050.00317.50
8.1.40.0040.00417.54
8.1.30.0030.00617.62
8.1.20.0080.00017.54
8.1.10.0070.00017.59
8.1.00.0050.00317.57
8.0.300.0040.00418.77
8.0.290.0040.00416.63
8.0.280.0000.00718.52
8.0.270.0030.00517.22
8.0.260.0080.00017.29
8.0.250.0060.00317.08
8.0.240.0000.00716.95
8.0.230.0000.00716.91
8.0.220.0000.00716.82
8.0.210.0070.00016.97
8.0.200.0040.00416.97
8.0.190.0050.00317.07
8.0.180.0050.00316.93
8.0.170.0030.00516.89
8.0.160.0000.00717.01
8.0.150.0030.00316.99
8.0.140.0040.00416.93
8.0.130.0050.00013.34
8.0.120.0050.00316.95
8.0.110.0040.00416.94
8.0.100.0040.00416.84
8.0.90.0040.00416.77
8.0.80.0100.00716.90
8.0.70.0000.00716.80
8.0.60.0070.00016.91
8.0.50.0000.00716.68
8.0.30.0120.00816.96
8.0.20.0140.00917.40
8.0.10.0000.00717.06
8.0.00.0100.01016.68
7.4.330.0000.00615.09
7.4.320.0070.00016.63
7.4.300.0030.00316.60
7.4.290.0030.00316.49
7.4.280.0050.00216.59
7.4.270.0060.00016.51
7.4.260.0040.00416.61
7.4.250.0040.00416.39
7.4.240.0070.00016.55
7.4.230.0070.00016.30
7.4.220.0120.00616.60
7.4.210.0080.00516.45
7.4.200.0070.00016.62
7.4.160.0130.00316.59
7.4.150.0090.00917.40
7.4.140.0070.01417.86
7.4.130.0130.00416.54
7.4.120.0120.00516.50
7.4.110.0130.01016.41
7.4.100.0100.01316.56
7.4.90.0100.00616.59
7.4.80.0070.01019.39
7.4.70.0120.00416.42
7.4.60.0060.01016.52
7.4.50.0000.00816.29
7.4.40.0070.01716.48
7.4.30.0120.00916.37
7.4.00.0070.01015.07
7.3.330.0000.00713.18
7.3.320.0050.00013.06
7.3.310.0040.00416.27
7.3.300.0030.00316.34
7.3.290.0090.00616.33
7.3.280.0100.00816.41
7.3.270.0110.01117.40
7.3.260.0140.00316.48
7.3.250.0090.00816.34
7.3.240.0060.01116.63
7.3.230.0060.01216.39
7.3.210.0090.00916.54
7.3.200.0110.00716.24
7.3.190.0060.01016.48
7.3.180.0060.00916.61
7.3.170.0090.00616.27
7.3.160.0100.01316.37
7.2.330.0030.01816.51
7.2.320.0130.00616.79
7.2.310.0030.01316.36
7.2.300.0040.01216.55
7.2.290.0090.01616.66
7.2.60.0000.01416.66
7.2.00.0030.01219.44
7.1.200.0060.00815.95
7.1.100.0100.00318.18
7.1.70.0060.00317.32
7.1.60.0130.00919.12
7.1.50.0060.01016.90
7.1.00.0070.07322.54
7.0.200.0070.01016.92
7.0.60.0130.08320.01
7.0.50.0170.07017.88
7.0.40.0130.05019.96
7.0.30.0300.06320.17
7.0.20.0300.06720.23
7.0.10.0030.09020.16
7.0.00.0030.09020.30
5.6.280.0070.05720.85
5.6.210.0130.07720.54
5.6.200.0100.07718.09
5.6.190.0070.05020.35
5.6.180.0230.04020.48
5.6.170.0270.04020.71
5.6.160.0100.07320.61
5.6.150.0100.03718.20
5.6.140.0000.08718.18
5.6.130.0070.08718.18
5.6.120.0170.08021.13
5.6.110.0030.08721.01
5.6.100.0030.09020.97
5.6.90.0130.06721.08
5.6.80.0100.07720.53
5.6.70.3730.04020.36
5.5.350.4270.04020.51
5.5.340.0030.04017.97
5.5.330.0170.07320.20
5.5.320.0130.04020.13
5.5.310.0300.07020.43
5.5.300.0030.06717.91
5.5.290.0030.04717.98
5.5.280.0130.08020.97
5.5.270.0100.03320.72
5.5.260.0100.07020.80
5.5.250.0070.08320.77
5.5.240.0230.07720.18
5.4.450.0700.06319.49
5.4.440.0830.07319.13
5.4.430.0700.05319.09
5.4.420.0730.07019.27
5.4.410.0730.06019.14
5.4.400.0830.07019.12
5.4.390.0800.07018.99
5.4.380.0700.05719.27
5.4.370.0830.04719.18
5.4.360.1130.06019.16
5.4.350.0770.06319.12
5.4.340.0770.06319.30
5.4.320.0600.06019.12
5.4.310.0130.06019.16
5.4.300.0230.05018.95
5.4.290.0700.06719.14
5.4.280.0770.08318.91
5.4.270.0800.07019.30
5.4.260.0730.06719.23
5.4.250.0470.07318.91
5.4.240.0130.07019.07
5.4.230.0100.06019.14
5.4.220.0600.06719.18
5.4.210.0530.07018.94
5.4.200.0430.06319.11
5.4.190.0200.06319.15
5.4.180.0070.07318.80
5.4.170.0670.06019.20
5.4.160.0600.06319.09
5.4.150.0670.07019.27
5.4.140.0730.06316.36
5.4.130.0870.06016.37
5.4.120.0830.06716.26
5.4.110.0830.06716.47
5.4.100.0730.06016.42
5.4.90.0770.07316.29
5.4.80.0900.05716.50
5.4.70.0270.06716.48
5.4.60.0230.06016.19
5.4.50.0030.03316.45
5.4.40.0000.03716.04
5.4.30.0030.07716.43
5.4.20.0030.07316.18

preferences:
45.65 ms | 401 KiB | 5 Q