3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a='ddd王多多'; echo mb_substr($a,0,2,'utf-8'); exit;

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)
8.3.40.0180.00318.53
8.3.30.0070.00718.59
8.3.20.0040.00420.17
8.3.10.0080.00023.50
8.3.00.0030.00519.25
8.2.170.0070.01422.96
8.2.160.0030.01720.39
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0000.00726.16
8.2.120.0030.00519.89
8.2.110.0060.00320.46
8.2.100.0060.00617.80
8.2.90.0000.00919.26
8.2.80.0000.00917.97
8.2.70.0090.00017.38
8.2.60.0000.00817.93
8.2.50.0050.00318.07
8.2.40.0000.00720.97
8.2.30.0040.00420.67
8.2.20.0000.00917.61
8.2.10.0040.00417.93
8.2.00.0040.00417.98
8.1.270.0000.00823.79
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0090.00023.84
8.1.230.0040.00818.97
8.1.220.0000.00817.74
8.1.210.0040.00418.77
8.1.200.0030.00617.35
8.1.190.0000.00817.70
8.1.180.0050.00318.10
8.1.170.0000.00818.46
8.1.160.0070.00021.85
8.1.150.0000.00718.81
8.1.140.0080.00019.48
8.1.130.0000.00717.59
8.1.120.0030.00617.29
8.1.110.0070.00017.28
8.1.100.0040.00417.40
8.1.90.0040.00417.28
8.1.80.0000.00717.24
8.1.70.0050.00317.37
8.1.60.0040.00717.47
8.1.50.0050.00517.51
8.1.40.0020.00517.56
8.1.30.0040.00417.61
8.1.20.0000.00717.66
8.1.10.0000.00717.52
8.1.00.0000.00817.50
8.0.300.0000.00718.77
8.0.290.0070.00016.88
8.0.280.0030.00318.60
8.0.270.0030.00317.32
8.0.260.0050.00317.24
8.0.250.0000.00617.03
8.0.240.0070.00017.02
8.0.230.0030.00317.00
8.0.220.0060.00316.89
8.0.210.0030.00516.83
8.0.200.0030.00316.88
8.0.190.0000.00917.00
8.0.180.0000.00716.89
8.0.170.0080.00016.99
8.0.160.0080.00016.86
8.0.150.0070.00016.95
8.0.140.0030.00316.82
8.0.130.0030.00313.41
8.0.120.0030.00616.83
8.0.110.0030.00616.88
8.0.100.0040.00416.95
8.0.90.0000.00716.89
8.0.80.0120.00616.94
8.0.70.0040.00416.78
8.0.60.0000.00716.82
8.0.50.0000.00816.96
8.0.30.0120.00717.24
8.0.20.0110.00717.40
8.0.10.0040.00416.99
8.0.00.0080.01016.93
7.4.330.0050.00016.87
7.4.320.0050.00216.52
7.4.300.0040.00416.32
7.4.290.0030.00316.57
7.4.280.0060.00316.41
7.4.270.0000.00716.44
7.4.260.0030.00616.50
7.4.250.0000.00716.48
7.4.240.0020.00516.45
7.4.230.0030.00316.46
7.4.220.0130.01316.50
7.4.210.0130.00716.40
7.4.200.0000.00716.46
7.4.160.0060.00916.36
7.4.150.0150.00317.40
7.4.140.0100.01317.86
7.4.130.0100.01116.59
7.4.120.0120.00616.47
7.4.110.0140.00316.50
7.4.100.0030.01716.65
7.4.90.0140.00416.45
7.4.80.0090.01219.39
7.4.70.0130.00616.59
7.4.60.0080.00816.49
7.4.50.0070.01116.49
7.4.40.0170.00616.47
7.4.30.0190.00316.45
7.4.00.0050.01015.02
7.3.330.0030.00312.95
7.3.320.0030.00213.08
7.3.310.0030.00416.23
7.3.300.0000.00716.18
7.3.290.0060.00916.15
7.3.280.0110.00616.22
7.3.270.0100.00717.40
7.3.260.0110.00616.17
7.3.250.0090.00816.42
7.3.240.0110.00716.33
7.3.230.0140.00316.41
7.3.210.0090.00816.11
7.3.200.0100.00716.08
7.3.190.0080.00816.36
7.3.180.0090.00916.44
7.3.170.0170.00316.27
7.3.160.0190.00316.19
7.3.120.0070.00714.75
7.3.110.0110.00714.79
7.3.100.0070.01014.66
7.3.90.0120.00314.90
7.3.80.0030.01014.80
7.3.70.0000.01014.66
7.3.60.0100.00314.91
7.3.50.0100.00614.57
7.3.40.0000.01314.38
7.3.30.0030.00714.79
7.3.20.0040.01116.57
7.3.10.0100.00716.43
7.3.00.0120.00616.37
7.2.330.0050.01116.61
7.2.320.0160.00016.48
7.2.310.0130.00416.34
7.2.300.0030.01316.47
7.2.290.0100.00716.28
7.2.250.0060.01315.13
7.2.240.0140.00714.86
7.2.230.0060.00915.00
7.2.220.0070.00715.15
7.2.210.0000.01514.91
7.2.200.0070.00414.80
7.2.190.0000.01614.97
7.2.180.0100.00714.64
7.2.170.0060.00614.46
7.2.130.0090.00616.72
7.2.120.0120.00516.54
7.2.110.0090.00916.54
7.2.100.0110.01116.75
7.2.90.0170.00716.86
7.2.80.0120.00816.39
7.2.70.0100.00816.78
7.2.60.0190.00716.78
7.2.50.0360.00416.63
7.2.40.0060.00716.53
7.2.30.0150.00616.66
7.2.20.0110.00616.42
7.2.10.0260.01016.84
7.2.00.0220.00517.45
7.1.330.0080.00315.50
7.1.320.0080.00415.70
7.1.310.0060.00915.35
7.1.300.0030.00815.75
7.1.290.0090.00915.69
7.1.280.0090.00315.79
7.1.270.0090.00615.38
7.1.260.0040.00815.86
7.1.250.0060.00415.42
7.1.200.0060.00615.52
7.1.100.0760.01616.25
7.1.70.0070.01016.98
7.1.60.0110.01419.36
7.1.50.0120.00816.61
7.1.00.0070.07322.44
7.0.200.0040.00416.79
7.0.60.0070.08719.86
7.0.50.0030.08017.90
7.0.40.0270.06020.23
7.0.30.0330.08020.13
7.0.20.0330.08020.17
7.0.10.0100.05320.16
7.0.00.0000.09020.00
5.6.280.0070.04320.81
5.6.210.0130.05020.46
5.6.200.0070.08318.11
5.6.190.0100.04020.45
5.6.180.0430.07720.41
5.6.170.0230.04720.48
5.6.160.0030.07720.48
5.6.150.0100.07718.18
5.6.140.0000.04318.19
5.6.130.0100.05018.18
5.6.120.0070.04021.14
5.6.110.0200.07320.88
5.6.100.0130.07320.96
5.6.90.0170.07721.15
5.6.80.0030.04020.39
5.5.350.0230.07320.48
5.5.340.0100.07317.89
5.5.330.0100.03720.57
5.5.320.0070.08320.32
5.5.310.0270.04020.30
5.5.300.0130.07717.91
5.5.290.0130.06717.98
5.5.280.0070.08020.80
5.5.270.0070.05320.75
5.5.260.0270.07020.82
5.5.250.0100.04720.68
5.5.240.0270.06720.26

preferences:
52.73 ms | 400 KiB | 5 Q