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)
8.3.60.0090.00918.54
8.3.50.0260.00221.92
8.3.40.0140.00418.70
8.3.30.0120.00319.04
8.3.20.0070.00320.35
8.3.10.0030.00622.05
8.3.00.0030.00622.46
8.2.180.0160.00616.50
8.2.170.0140.00022.96
8.2.160.0130.00619.20
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0140.00326.16
8.2.120.0000.00917.63
8.2.110.0070.00322.00
8.2.100.0060.00617.72
8.2.90.0050.00517.50
8.2.80.0040.00417.97
8.2.70.0000.00817.93
8.2.60.0040.00418.04
8.2.50.0030.00518.10
8.2.40.0050.00220.59
8.2.30.0040.00417.98
8.2.20.0050.00217.64
8.2.10.0040.00417.75
8.2.00.0000.00817.71
8.1.280.0000.01425.92
8.1.270.0090.00022.18
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0060.00323.96
8.1.230.0040.01119.16
8.1.220.0000.00817.79
8.1.210.0080.00018.77
8.1.200.0040.00417.35
8.1.190.0050.00317.10
8.1.180.0050.00318.10
8.1.170.0000.00818.59
8.1.160.0070.00022.01
8.1.150.0050.00318.71
8.1.140.0040.00417.41
8.1.130.0000.00717.77
8.1.120.0000.00717.45
8.1.110.0030.00517.52
8.1.100.0030.00317.55
8.1.90.0000.00717.39
8.1.80.0050.00217.50
8.1.70.0030.00517.45
8.1.60.0000.00817.63
8.1.50.0040.00417.52
8.1.40.0050.00217.51
8.1.30.0050.00317.69
8.1.20.0040.00417.58
8.1.10.0000.00717.58
8.1.00.0000.00717.39
8.0.300.0000.00719.80
8.0.290.0040.00416.63
8.0.280.0000.00818.50
8.0.270.0030.00517.27
8.0.260.0000.00616.81
8.0.250.0050.00316.92
8.0.240.0030.00517.04
8.0.230.0000.00717.05
8.0.220.0040.00416.97
8.0.210.0000.00716.84
8.0.200.0000.00716.89
8.0.190.0080.00016.93
8.0.180.0030.00316.86
8.0.170.0080.00016.98
8.0.160.0000.00716.93
8.0.150.0060.00316.79
8.0.140.0000.00716.93
8.0.130.0030.00313.36
8.0.120.0000.00716.91
8.0.110.0000.00716.96
8.0.100.0050.00317.01
8.0.90.0040.00417.02
8.0.80.0100.01016.86
8.0.70.0040.00416.79
8.0.60.0040.00416.83
8.0.50.0000.00816.70
8.0.30.0140.00717.10
8.0.20.0090.01017.40
8.0.10.0030.00316.91
8.0.00.0050.01216.69
7.4.330.0050.00015.14
7.4.320.0030.00316.53
7.4.300.0030.00316.40
7.4.290.0030.00316.52
7.4.280.0030.00316.41
7.4.270.0000.00716.48
7.4.260.0030.00316.49
7.4.250.0040.00416.46
7.4.240.0030.00416.57
7.4.230.0070.00016.34
7.4.220.0110.00716.54
7.4.210.0060.00916.54
7.4.200.0080.00016.35
7.4.190.0000.00716.61
7.4.160.0040.01116.28
7.4.150.0100.00717.40
7.4.140.0090.01217.86
7.4.130.0090.00916.46
7.4.120.0110.00616.56
7.4.110.0130.00316.30
7.4.100.0150.00916.42
7.4.90.0140.00716.49
7.4.80.0130.00919.39
7.4.70.0110.00716.35
7.4.60.0070.01016.55
7.4.50.0000.00416.44
7.4.40.0030.01022.77
7.4.30.0040.01416.54
7.4.00.0090.00614.95
7.3.330.0050.00013.17
7.3.320.0050.00013.18
7.3.310.0040.00416.21
7.3.300.0030.00316.34
7.3.290.0060.00916.29
7.3.280.0090.00916.29
7.3.270.0000.01717.40
7.3.260.0100.00616.35
7.3.250.0140.00616.40
7.3.240.0100.01016.44
7.3.230.0090.00916.39
7.3.210.0060.01116.57
7.3.200.0120.00619.39
7.3.190.0120.00916.41
7.3.180.0070.00716.23
7.3.170.0070.01316.27
7.3.160.0000.01516.65
7.3.120.0080.00814.54
7.2.330.0080.00816.79
7.2.320.0070.01416.52
7.2.310.0030.01316.48
7.2.300.0070.01016.71
7.2.290.0090.00916.64
7.2.00.0030.01319.73
7.1.100.0030.01018.23
7.1.70.0060.01317.15
7.1.60.0040.01819.82
7.1.50.0040.02117.20
7.1.00.0030.07722.45
7.0.200.0000.00916.64
7.0.140.0000.08022.10
7.0.60.0030.04019.87
7.0.50.0100.08317.81
7.0.40.0070.04320.07
7.0.30.0370.06720.21
7.0.20.0200.04020.18
7.0.10.0030.06320.12
7.0.00.0130.08019.99
5.6.280.0100.06721.10
5.6.210.0130.07320.56
5.6.200.0070.04718.10
5.6.190.0100.04020.61
5.6.180.0070.08320.60
5.6.170.0330.07320.50
5.6.160.0070.07720.49
5.6.150.0030.05318.09
5.6.140.0030.04718.11
5.6.130.0100.05718.22
5.6.120.0070.06721.14
5.6.110.0000.09320.88
5.6.100.0100.07321.10
5.6.90.0070.07721.11
5.6.80.0100.07720.53
5.5.350.0030.08020.32
5.5.340.0070.07717.96
5.5.330.0070.08320.42
5.5.320.0100.08320.43
5.5.310.0200.06320.50
5.5.300.0100.07717.94
5.5.290.0070.08017.92
5.5.280.0030.05720.67
5.5.270.0030.08320.73
5.5.260.0030.05020.75
5.5.250.0030.04020.69
5.5.240.0230.06720.25
5.4.450.0470.04319.55
5.4.440.0800.06319.55
5.4.430.0130.05319.52
5.4.420.0100.05319.42
5.4.410.0170.05319.25
5.4.400.0070.05719.00
5.4.390.0130.04718.96
5.4.380.0100.06318.53
5.4.370.0070.05318.70
5.4.360.0330.04318.66
5.4.350.0050.03911.97
5.4.340.0050.03511.97
5.4.320.0040.03812.46
5.4.310.0050.04012.45
5.4.300.0030.04012.45
5.4.290.0070.03712.45
5.4.280.0070.04312.35
5.4.270.0070.04012.35
5.4.260.0030.05718.62
5.4.250.0130.04718.77
5.4.240.0130.05018.70
5.4.230.0070.05718.66
5.4.220.0070.06018.61
5.4.210.0070.07318.71
5.4.200.0070.05318.98
5.4.190.0130.07018.71
5.4.180.0130.07018.70
5.4.170.0130.06718.66
5.4.160.0100.06318.84
5.4.150.0000.06018.79
5.4.140.0070.05716.25
5.4.130.0070.06316.40
5.4.120.0070.05016.19
5.4.110.0170.04016.47
5.4.100.0000.07716.34
5.4.90.0070.05316.33
5.4.80.0000.07716.40
5.4.70.0000.05716.39
5.4.60.0130.06016.37
5.4.50.0070.05316.25
5.4.40.0170.04016.34
5.4.30.0130.04016.24
5.4.20.0130.04316.38
5.4.10.0070.05016.16
5.4.00.0070.07015.65
5.3.290.0100.05612.80
5.3.280.0030.07714.69
5.3.270.0070.05314.49
5.3.260.0070.07714.52
5.3.250.0070.05314.65
5.3.240.0070.05314.62
5.3.230.0030.05714.29
5.3.220.0130.04714.44
5.3.210.0000.06014.43
5.3.200.0200.04714.59
5.3.190.0070.05014.42
5.3.180.0070.05014.66
5.3.170.0170.06014.59
5.3.160.0130.05014.33
5.3.150.0070.05014.71
5.3.140.0100.04714.56
5.3.130.0070.05714.56
5.3.120.0030.06314.70
5.3.110.0030.06014.38
5.3.100.0130.04313.91
5.3.90.0070.06713.93
5.3.80.0130.06314.01
5.3.70.0070.06013.91
5.3.60.0100.04713.71
5.3.50.0030.05314.04
5.3.40.0070.05013.83
5.3.30.0070.05013.78
5.3.20.0070.04713.63
5.3.10.0030.05013.53
5.3.00.0070.05313.52
5.2.170.0130.05011.29
5.2.160.0030.05711.13
5.2.150.0030.05311.24
5.2.140.0030.06011.05
5.2.130.0000.04311.19
5.2.120.0030.05311.01
5.2.110.0070.04011.05
5.2.100.0030.04011.19
5.2.90.0000.04311.06
5.2.80.0130.04710.93
5.2.70.0100.03710.99
5.2.60.0030.04311.14
5.2.50.0130.03311.02
5.2.40.0130.03311.02
5.2.30.0070.03710.80
5.2.20.0030.04710.89
5.2.10.0070.04010.94
5.2.00.0070.03710.93
5.1.60.0070.03010.05
5.1.50.0030.0339.90
5.1.40.0070.04710.04
5.1.30.0070.03310.41
5.1.20.0070.03310.25
5.1.10.0100.03710.09
5.1.00.0070.03010.13
5.0.50.0000.0338.63
5.0.40.0100.0308.47
5.0.30.0030.0438.45
5.0.20.0100.0338.24
5.0.10.0100.0278.36
5.0.00.0070.0438.20
4.4.90.0030.0236.08
4.4.80.0030.0206.08
4.4.70.0030.0236.08
4.4.60.0030.0236.08
4.4.50.0000.0236.08
4.4.40.0030.0336.08
4.4.30.0030.0206.08
4.4.20.0030.0206.08
4.4.10.0070.0306.08
4.4.00.0100.0276.08
4.3.110.0100.0136.08
4.3.100.0030.0206.08
4.3.90.0070.0176.08
4.3.80.0000.0406.08
4.3.70.0030.0236.08
4.3.60.0030.0176.08
4.3.50.0030.0206.08
4.3.40.0000.0336.08
4.3.30.0030.0206.08
4.3.20.0000.0236.08
4.3.10.0030.0206.08
4.3.00.0070.01013.05

preferences:
43.2 ms | 401 KiB | 5 Q