3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = ".1234kjhgkdfkgjh"; $result = is_int(substr($str, 0, 2)); var_dump($result);

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)
8.5.30.0080.00921.28
8.5.20.0080.00820.09
8.5.10.0110.00620.27
8.5.00.0130.00919.79
8.4.180.0140.00819.43
8.4.170.0120.01021.95
8.4.160.0130.00923.80
8.4.150.0070.00616.90
8.4.140.0140.00617.75
8.4.130.0090.01119.08
8.4.120.0090.01022.34
8.4.110.0120.00822.58
8.4.100.0090.01117.44
8.4.90.0110.00822.26
8.4.80.0030.00620.70
8.4.70.0080.00317.68
8.4.60.0100.01117.68
8.4.50.0140.00619.18
8.4.40.0180.00019.31
8.4.30.0040.00420.42
8.4.20.0080.00019.72
8.4.10.0000.00923.73
8.3.300.0080.01320.38
8.3.290.0080.01218.26
8.3.280.0150.00518.31
8.3.270.0140.00716.24
8.3.260.0110.00816.47
8.3.250.0100.00917.14
8.3.240.0070.01116.42
8.3.230.0020.00716.20
8.3.220.0140.00420.42
8.3.210.0120.00616.45
8.3.200.0130.00716.43
8.3.190.0130.00616.48
8.3.180.0110.00718.33
8.3.170.0060.00318.93
8.3.160.0100.00717.05
8.3.150.0120.00616.48
8.3.140.0000.00816.95
8.3.130.0080.01116.39
8.3.120.0120.00618.91
8.3.110.0110.00720.94
8.3.100.0040.01118.43
8.3.90.0110.00716.73
8.3.80.0030.00618.18
8.3.70.0070.00716.37
8.3.60.0100.00718.56
8.3.50.0100.01016.73
8.3.40.0140.00323.78
8.3.30.0140.00318.46
8.3.20.0050.00324.18
8.3.10.0000.00824.66
8.3.00.0100.00326.16
8.2.300.0080.01017.79
8.2.290.0150.00520.41
8.2.280.0060.00218.16
8.2.270.0140.00418.76
8.2.260.0060.00318.23
8.2.250.0000.01016.72
8.2.240.0110.00417.27
8.2.230.0040.00422.58
8.2.220.0080.00024.06
8.2.210.0040.00426.77
8.2.200.0060.00316.63
8.2.190.0040.01116.58
8.2.180.0070.01416.61
8.2.170.0110.00418.75
8.2.160.0090.00622.96
8.2.150.0040.00425.66
8.2.140.0110.00724.66
8.2.130.0080.00026.16
8.2.120.0040.00426.16
8.2.110.0090.00021.99
8.2.100.0110.00019.57
8.2.90.0040.00417.75
8.2.80.0060.00618.61
8.2.70.0000.00817.38
8.2.60.0000.00819.10
8.2.50.0040.00417.50
8.2.40.0080.00019.22
8.2.30.0000.00817.70
8.2.20.0060.00617.71
8.2.10.0150.00017.68
8.2.00.0100.00517.56
8.1.340.0120.00717.57
8.1.330.0070.01221.61
8.1.320.0110.01116.23
8.1.310.0040.00418.35
8.1.300.0050.00518.50
8.1.290.0060.00318.88
8.1.280.0140.00725.92
8.1.270.0030.00624.66
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0070.00322.14
8.1.230.0090.00317.57
8.1.220.0000.00817.79
8.1.210.0050.00318.77
8.1.200.0060.00317.00
8.1.190.0030.00717.11
8.1.180.0000.00918.10
8.1.170.0050.00218.87
8.1.160.0050.00517.42
8.1.150.0040.01117.29
8.1.140.0110.00417.54
8.1.130.0090.00617.25
8.1.120.0100.00517.48
8.1.110.0110.00417.48
8.1.100.0090.00617.34
8.1.90.0110.00417.35
8.1.80.0080.00817.39
8.1.70.0050.00817.29
8.1.60.0000.01317.56
8.1.50.0210.00017.41
8.1.40.0100.00317.63
8.1.30.0100.00417.52
8.1.20.0130.00317.68
8.1.10.0150.00417.29
8.1.00.0130.00317.36
8.0.300.0070.00018.77
8.0.290.0000.00816.63
8.0.280.0090.00416.73
8.0.270.0030.01016.73
8.0.260.0100.00516.73
8.0.250.0050.01016.73
8.0.240.0160.00016.80
8.0.230.0160.00016.79
8.0.220.0000.01616.73
8.0.210.0190.00016.73
8.0.200.0120.00416.84
8.0.190.0050.01116.73
8.0.180.0100.00616.73
8.0.170.0120.00416.77
8.0.160.0070.00716.73
8.0.150.0090.00416.73
8.0.140.0110.00416.73
8.0.130.0160.00016.73
8.0.120.0060.00616.73
8.0.110.0060.00616.73
8.0.100.0130.00016.73
8.0.90.0120.00016.73
8.0.80.0140.00016.73
8.0.70.0120.00016.73
8.0.60.0140.00016.73
8.0.50.0130.00016.73
8.0.30.0070.00716.73
8.0.20.0160.00016.78
8.0.10.0130.00016.75

preferences:
94.3 ms | 1095 KiB | 5 Q