3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(substr('😀',0 ,1)); var_dump(mb_substr('😀', 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)
8.3.70.0080.00818.18
8.3.60.0070.01418.43
8.3.50.0110.00716.24
8.3.40.0040.01118.62
8.3.30.0060.00918.50
8.3.20.0000.00721.73
8.3.10.0050.00221.60
8.3.00.0040.00419.79
8.2.180.0110.00416.32
8.2.170.0070.01022.96
8.2.160.0100.00720.94
8.2.150.0040.00424.18
8.2.140.0070.00024.66
8.2.130.0040.00426.16
8.2.120.0000.00819.23
8.2.110.0080.00322.08
8.2.100.0040.00817.59
8.2.90.0000.00817.72
8.2.80.0000.01017.97
8.2.70.0040.00417.50
8.2.60.0030.00517.90
8.2.50.0000.00818.10
8.2.40.0080.00022.24
8.2.30.0050.00220.47
8.2.20.0070.00017.84
8.2.10.0000.00717.98
8.2.00.0040.00417.95
8.1.280.0070.00725.92
8.1.270.0070.00024.02
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0090.00022.33
8.1.230.0080.00320.61
8.1.220.0000.00817.74
8.1.210.0030.00618.77
8.1.200.0070.00317.23
8.1.190.0030.00617.23
8.1.180.0060.00318.10
8.1.170.0040.00418.55
8.1.160.0050.00218.66
8.1.150.0000.00720.34
8.1.140.0040.00419.43
8.1.130.0000.00820.50
8.1.120.0040.00417.30
8.1.110.0060.00317.36
8.1.100.0080.00017.35
8.1.90.0060.00317.26
8.1.80.0050.00217.17
8.1.70.0070.00017.30
8.1.60.0080.00417.43
8.1.50.0000.00717.43
8.1.40.0040.00417.49
8.1.30.0080.00017.44
8.1.20.0050.00217.48
8.1.10.0030.00517.44
8.1.00.0070.00017.42
8.0.300.0000.00719.95
8.0.290.0070.00316.58
8.0.280.0000.00718.37
8.0.270.0000.00717.18
8.0.260.0030.00316.75
8.0.250.0030.00316.79
8.0.240.0030.00516.88
8.0.230.0000.00716.92
8.0.220.0000.00716.81
8.0.210.0000.00616.76
8.0.200.0070.00016.80
8.0.190.0000.00916.89
8.0.180.0000.00716.77
8.0.170.0000.00716.76
8.0.160.0030.00616.85
8.0.150.0000.00716.89
8.0.140.0040.00416.66
8.0.130.0040.00413.21
8.0.120.0070.00016.80
8.0.110.0070.00016.82
8.0.100.0000.00716.86
8.0.90.0040.00416.89
8.0.80.0060.01316.84
8.0.70.0050.00316.79
8.0.60.0030.00316.89
8.0.50.0000.00716.74
8.0.30.0190.00417.09
8.0.20.0080.01017.40
8.0.10.0070.00016.95
8.0.00.0090.00916.73
7.4.330.0030.00315.55
7.4.320.0030.00316.48
7.4.300.0060.00016.38
7.4.290.0100.00016.23
7.4.280.0050.00316.36
7.4.270.0000.00716.45
7.4.260.0070.00316.35
7.4.250.0000.00716.25
7.4.240.0040.00416.45
7.4.230.0050.00316.36
7.4.220.0120.01216.20
7.4.210.0070.01316.47
7.4.200.0000.00716.54
7.4.160.0090.01116.30
7.4.150.0150.01017.40
7.4.140.0070.01517.86
7.4.130.0190.00816.27
7.4.120.0100.00916.28
7.4.110.0030.01316.32
7.4.100.0070.01416.30
7.4.90.0090.00916.23
7.4.80.0100.01019.39
7.4.70.0120.00616.45
7.4.60.0100.00616.21
7.4.50.0090.00616.17
7.4.40.0080.00816.44
7.4.30.0120.00616.25
7.4.00.0060.01114.83
7.3.330.0060.00013.07
7.3.320.0020.00212.97
7.3.310.0070.00016.02
7.3.300.0040.00416.07
7.3.290.0120.00516.09
7.3.280.0080.00816.12
7.3.270.0070.01017.40
7.3.260.0110.00616.15
7.3.250.0130.00616.30
7.3.240.0080.00916.13
7.3.230.0090.00916.47
7.3.210.0060.01216.42
7.3.200.0040.01216.48
7.3.190.0130.01016.25
7.3.180.0100.00716.16
7.3.170.0090.00816.03
7.3.160.0120.00316.43
7.2.330.0190.00016.27
7.2.320.0150.00316.44
7.2.310.0060.00916.46
7.2.300.0000.01816.36
7.2.290.0060.01216.33
7.2.60.0060.00616.60
7.2.50.0030.00716.43
7.1.200.0000.01115.72
7.1.70.0000.00716.93
7.1.60.0200.02332.98
7.1.50.3470.02032.57
7.1.40.2130.01732.38
7.1.30.2270.01732.48
7.1.20.2630.01332.65
7.1.10.0030.01014.62
7.1.00.4470.01314.74
7.0.200.2730.01014.69
7.0.190.0100.01314.77
7.0.180.0130.01014.15
7.0.170.1930.01314.49
7.0.160.2400.01714.31
7.0.150.0070.00714.02
7.0.140.4000.01314.21
7.0.130.0070.01014.43
7.0.120.0100.00714.56
7.0.110.0030.01014.27
7.0.100.0030.01014.48
7.0.90.0200.01014.22
7.0.80.2830.00714.27
7.0.70.2630.01014.10
7.0.60.3430.01314.28
7.0.50.0030.01314.25
7.0.40.2400.01014.55
7.0.30.2570.01714.29
7.0.20.0000.01314.48
7.0.10.0070.01014.30
7.0.00.0070.01314.38

preferences:
55.69 ms | 400 KiB | 5 Q