3v4l.org

run code in 300+ PHP versions simultaneously
<?php $content = "<?"; $tokensOldContentLength = 0; $possibleOpenContent = substr($content, $tokensOldContentLength, 5); var_dump($possibleOpenContent); var_dump(substr('a', 2, 2));

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)
8.3.60.0160.00318.06
8.3.50.0100.01020.23
8.3.40.0140.00018.58
8.3.30.0110.00419.09
8.3.20.0040.00424.18
8.3.10.0050.00224.66
8.3.00.0040.00426.16
8.2.180.0080.00825.92
8.2.170.0070.00718.83
8.2.160.0100.00322.96
8.2.150.0040.00425.66
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00426.16
8.2.110.0000.00820.39
8.2.100.0080.00417.91
8.2.90.0040.00420.32
8.2.80.0040.00418.64
8.2.70.0030.00517.25
8.2.60.0080.00017.80
8.2.50.0000.00918.07
8.2.40.0080.00019.82
8.2.30.0040.00417.93
8.2.20.0040.00420.41
8.2.10.0040.00417.97
8.2.00.0000.00819.28
8.1.280.0070.00725.92
8.1.270.0070.00023.99
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0090.00020.38
8.1.230.0070.00417.83
8.1.220.0090.00017.74
8.1.210.0040.00418.77
8.1.200.0030.00617.23
8.1.190.0000.00717.23
8.1.180.0080.00018.10
8.1.170.0030.00518.45
8.1.160.0070.00018.82
8.1.150.0000.01018.50
8.1.140.0040.00417.29
8.1.130.0040.00418.80
8.1.120.0030.00317.43
8.1.110.0040.00417.37
8.1.100.0000.00717.39
8.1.90.0070.00017.31
8.1.80.0050.00217.41
8.1.70.0000.00717.39
8.1.60.0130.00317.48
8.1.50.0150.01017.30
8.1.40.0230.00017.32
8.1.30.0210.00317.50
8.1.20.0160.00417.54
8.1.10.0150.00917.41
8.1.00.0180.00717.25
8.0.300.0040.00418.77
8.0.290.0060.00316.63
8.0.280.0000.00718.31
8.0.270.0000.00716.66
8.0.260.0040.00418.32
8.0.250.0060.00316.84
8.0.240.0030.00316.81
8.0.230.0030.00516.95
8.0.220.0030.00316.81
8.0.210.0000.00716.86
8.0.200.0070.00016.92
8.0.190.0160.00316.78
8.0.180.0150.00516.80
8.0.170.0150.00316.64
8.0.160.0160.00416.75
8.0.150.0150.00516.77
8.0.140.0100.01016.79
8.0.130.0170.00616.70
8.0.120.0160.00416.77
8.0.110.0110.00716.81
8.0.100.0180.00316.71
8.0.90.0150.00516.70
8.0.80.0120.00816.82
8.0.70.0200.00016.61
8.0.60.0150.00516.71
8.0.50.0130.00516.80
8.0.30.0150.00416.82
8.0.20.0150.00516.83
8.0.10.0060.01216.91
7.4.330.0030.00215.55
7.4.320.0000.00716.51
7.4.300.0070.00016.45
7.4.290.0100.00716.44
7.4.280.0190.00316.38
7.4.270.0190.00016.33
7.4.260.0190.00316.38
7.4.250.0180.00316.47
7.4.240.0110.00816.38
7.4.230.0070.00716.34
7.4.220.0150.00316.46
7.4.210.0170.00016.53
7.4.200.0100.00316.48
7.4.190.0050.00516.48
7.4.180.0070.00216.34
7.4.160.0120.00616.53
7.4.150.0110.00716.37
7.4.140.0100.01016.35
7.4.130.0140.00216.32
7.4.120.0190.00016.17
7.4.110.0090.00616.27
7.4.100.0140.00316.34
7.4.90.0170.00316.33
7.4.80.0160.00316.27
7.4.70.0160.00316.39
7.4.60.0080.00816.36
7.4.50.0080.00816.24
7.4.40.0070.01116.32
7.4.30.0120.00616.34
7.4.20.0180.00016.35
7.4.10.0140.00416.24
7.4.00.0170.00016.38

preferences:
47.75 ms | 401 KiB | 5 Q