3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "u0xcc0x88"; var_dump($string); var_dump(mb_substr($string, 0, 1));

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)
8.3.60.0070.01418.55
8.3.50.0110.00416.03
8.3.40.0070.01121.76
8.3.30.0100.01018.46
8.3.20.0040.00424.18
8.3.10.0000.00724.66
8.3.00.0000.00826.16
8.2.180.0170.00725.92
8.2.170.0040.01118.86
8.2.160.0100.00322.96
8.2.150.0000.00825.66
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00420.98
8.2.110.0090.00019.36
8.2.100.0080.00417.59
8.2.90.0040.00417.91
8.2.80.0080.00017.97
8.2.70.0000.00818.04
8.2.60.0030.00618.22
8.2.50.0040.00418.10
8.2.40.0040.00419.17
8.2.30.0000.00719.15
8.2.20.0050.00218.11
8.2.10.0040.00421.04
8.2.00.0000.00719.07
8.1.280.0040.01125.92
8.1.270.0040.00423.99
8.1.260.0000.00826.35
8.1.250.0000.00728.09
8.1.240.0090.00023.78
8.1.230.0080.00420.60
8.1.220.0060.00317.74
8.1.210.0030.00618.77
8.1.200.0060.00317.22
8.1.190.0000.00817.13
8.1.180.0030.00518.10
8.1.170.0000.00818.45
8.1.160.0030.00318.90
8.1.150.0000.00818.83
8.1.140.0000.00718.80
8.1.130.0030.00320.03
8.1.120.0000.00717.28
8.1.110.0050.00317.31
8.1.100.0000.00817.40
8.1.90.0000.00817.30
8.1.80.0030.00517.35
8.1.70.0070.00017.24
8.1.60.0000.00717.40
8.1.50.0040.00417.41
8.1.40.0040.00417.50
8.1.30.0060.00617.64
8.1.20.0060.00317.52
8.1.10.0000.00717.48
8.1.00.0080.00017.29
8.0.300.0000.00920.09
8.0.290.0000.00816.75
8.0.280.0070.00018.34
8.0.270.0000.00716.80
8.0.260.0000.00720.11
8.0.250.0000.00716.99
8.0.240.0000.00616.98
8.0.230.0000.00716.99
8.0.220.0000.00716.88
8.0.210.0080.00016.89
8.0.200.0060.00016.94
8.0.190.0040.00416.92
8.0.180.0040.00416.89
8.0.170.0000.00916.78
8.0.160.0040.00416.94
8.0.150.0050.00616.83
8.0.140.0040.00416.85
8.0.130.0000.00513.33
8.0.120.0000.00716.89
8.0.110.0050.00216.74
8.0.100.0000.00816.98
8.0.90.0050.00216.70
8.0.80.0070.01116.80
8.0.70.0040.00416.71
8.0.60.0080.00016.74
8.0.50.0000.00716.74
8.0.30.0100.00716.95
8.0.20.0080.01016.96
8.0.10.0040.00416.92
8.0.00.0170.00316.66
7.4.330.0020.00215.55
7.4.320.0000.00716.43
7.4.300.0000.00616.44
7.4.290.0030.00516.52
7.4.280.0040.00416.43
7.4.270.0000.00716.38
7.4.260.0050.00013.23
7.4.250.0030.00316.45
7.4.240.0030.00316.36
7.4.230.0030.00316.52
7.4.220.0040.00416.34
7.4.210.0090.00716.42
7.4.200.0040.00416.52
7.4.130.0070.01016.34
7.4.120.0090.00816.35
7.4.110.0070.01016.26
7.4.100.0140.00416.15
7.4.90.0070.01016.27
7.4.80.0140.00616.30
7.4.70.0180.00716.34
7.4.60.0070.01316.02
7.4.50.0140.01116.13
7.4.40.0170.00716.15
7.4.30.0120.00616.12
7.4.20.0110.00716.34
7.4.10.0170.00716.14
7.4.00.0090.00916.13
7.3.330.0000.00716.22
7.3.320.0000.00513.03
7.3.310.0040.00416.27
7.3.300.0000.00616.14
7.3.290.0060.01016.12
7.3.260.0070.01716.10
7.3.230.0100.00716.45
7.3.220.0170.00016.09
7.3.210.0080.00815.91
7.3.200.0120.00815.87
7.3.190.0070.01116.15
7.3.180.0100.00716.00
7.3.170.0030.01416.27
7.3.160.0090.00915.80
7.3.150.0060.01316.29
7.3.140.0040.01416.16
7.3.130.0090.00915.99
7.3.120.0100.00716.27
7.3.110.0090.00916.16
7.3.100.0150.00716.00
7.3.90.0180.00416.02
7.3.80.0060.01215.96
7.3.70.0080.00815.84
7.3.60.0060.01315.88
7.3.50.0100.00715.92
7.3.40.0070.01015.79
7.3.30.0090.00916.07
7.3.20.0130.00415.91
7.3.10.0100.00716.00
7.3.00.0090.00915.96
7.2.340.0070.01016.42
7.2.330.0070.01016.39
7.2.320.0130.00816.32
7.2.310.0120.00916.39
7.2.300.0170.00415.98
7.2.290.0100.01516.09
7.2.280.0200.00716.30
7.2.270.0100.00716.17
7.2.260.0120.00916.23
7.2.250.0030.01416.38
7.2.240.0070.01316.04
7.2.230.0170.01015.95
7.2.220.0120.00616.40
7.2.210.0200.00616.23
7.2.200.0060.01316.12
7.2.190.0140.00315.96
7.2.180.0070.01015.93
7.2.170.0110.00715.98
7.2.160.0130.01016.21
7.2.150.0100.01016.45
7.2.140.0050.01316.13
7.2.130.0120.00615.82
7.2.120.0120.00816.13
7.2.110.0100.00716.07
7.2.100.0150.00415.88
7.2.90.0070.01116.02
7.2.80.0040.01316.03
7.2.70.0070.01116.16
7.2.60.0060.01315.85
7.2.50.0070.01115.91
7.2.40.0090.00916.07
7.2.30.0120.00616.18
7.2.20.0130.01016.27
7.2.10.0120.00616.06
7.2.00.0060.01316.07

preferences:
70.52 ms | 400 KiB | 5 Q