3v4l.org

run code in 300+ PHP versions simultaneously
<?php $sub = substr('abcdef', 4, -4); if ($sub === false) { echo 'fail'; } else { echo 'do somthing with $sub'; }

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)
8.3.60.0160.00618.43
8.3.50.0140.00716.51
8.3.40.0060.00918.70
8.3.30.0090.00618.33
8.3.20.0050.00324.18
8.3.10.0040.00424.66
8.3.00.0000.00726.16
8.2.180.0100.01325.92
8.2.170.0140.00018.95
8.2.160.0100.00722.96
8.2.150.0040.00425.66
8.2.140.0040.00424.66
8.2.130.0050.00326.16
8.2.120.0040.00426.35
8.2.110.0060.00320.28
8.2.100.0080.00417.84
8.2.90.0080.00018.28
8.2.80.0060.00318.09
8.2.70.0040.00417.38
8.2.60.0040.00417.25
8.2.50.0040.00417.63
8.2.40.0080.00019.34
8.2.30.0040.00419.06
8.2.20.0070.00017.98
8.2.10.0040.00419.06
8.2.00.0040.00419.23
8.1.280.0090.00925.92
8.1.270.0030.00623.99
8.1.260.0000.00828.09
8.1.250.0110.00428.09
8.1.240.0050.00519.26
8.1.230.0040.00720.84
8.1.220.0060.00317.74
8.1.210.0060.00318.77
8.1.200.0030.00517.35
8.1.190.0060.00317.23
8.1.180.0000.01218.10
8.1.170.0000.00817.62
8.1.160.0070.00018.93
8.1.150.0000.00918.80
8.1.140.0070.00018.82
8.1.130.0000.00820.06
8.1.120.0000.00817.41
8.1.110.0000.00717.35
8.1.100.0000.00817.43
8.1.90.0040.00417.35
8.1.80.0030.00617.32
8.1.70.0000.00817.40
8.1.60.0000.00717.47
8.1.50.0000.00817.50
8.1.40.0030.00617.49
8.1.30.0000.00817.62
8.1.20.0060.00317.48
8.1.10.0000.00817.52
8.1.00.0000.00817.44
8.0.300.0030.00319.77
8.0.290.0030.00516.63
8.0.280.0000.00718.52
8.0.270.0030.00316.82
8.0.260.0000.00718.44
8.0.250.0050.00216.77
8.0.240.0000.00916.88
8.0.230.0070.00016.76
8.0.220.0070.00016.73
8.0.210.0000.00616.79
8.0.200.0050.00316.86
8.0.190.0030.00516.95
8.0.180.0030.00516.91
8.0.170.0040.00716.82
8.0.160.0040.00416.80
8.0.150.0040.00416.71
8.0.140.0040.00416.70
8.0.130.0030.00313.19
8.0.120.0000.00716.79
8.0.110.0000.00716.66
8.0.100.0040.00416.72
8.0.90.0000.00816.63
8.0.80.0090.00916.80
8.0.70.0030.00516.78
8.0.60.0000.00716.82
8.0.50.0040.00416.88
8.0.30.0100.00716.97
8.0.20.0130.01317.15
8.0.10.0150.00317.01
8.0.00.0090.01117.03
7.4.330.0000.00515.55
7.4.320.0030.00316.40
7.4.300.0030.00316.40
7.4.290.0050.00216.54
7.4.280.0030.00516.50
7.4.270.0030.00316.45
7.4.260.0000.00613.26
7.4.250.0000.00716.54
7.4.240.0000.00716.50
7.4.230.0000.00716.67
7.4.220.0000.00716.45
7.4.210.0070.00816.54
7.4.200.0000.00716.55
7.4.140.0110.00716.43
7.4.130.0120.00716.39
7.4.120.0100.00916.46
7.4.110.0100.00916.47
7.4.100.0070.01116.37
7.4.90.0120.00616.38
7.4.80.0100.00816.32
7.4.70.0120.00816.25
7.4.60.0140.00716.46
7.4.50.0150.00316.36
7.4.40.0090.01216.25
7.4.30.0140.00616.37
7.4.20.0070.01116.41
7.4.10.0100.01016.41
7.4.00.0110.00916.43
7.3.330.0040.00416.15
7.3.320.0060.00013.13
7.3.310.0040.00416.29
7.3.300.0060.00016.19
7.3.290.0100.00916.18
7.3.260.0090.01016.27
7.3.250.0110.00916.31
7.3.240.0150.00216.21
7.3.230.0090.01116.18
7.3.220.0100.00816.31
7.3.210.0110.00816.29
7.3.200.0120.00816.29
7.3.190.0090.00916.10
7.3.180.0110.00916.29
7.3.170.0100.01016.21
7.3.160.0130.00716.26
7.3.150.0100.01016.46
7.3.140.0130.00616.34
7.3.130.0100.00916.45
7.3.120.0100.00816.33
7.3.110.0100.00716.29
7.3.100.0080.00916.36
7.3.90.0090.01016.32
7.3.80.0100.00916.30
7.3.70.0180.00416.33
7.3.60.0070.01016.23
7.3.50.0080.01016.27
7.3.40.0140.00516.30
7.3.30.0120.00716.24
7.3.20.0090.01016.25
7.3.10.0560.00816.27
7.3.00.0120.00816.31

preferences:
63.64 ms | 401 KiB | 5 Q