3v4l.org

run code in 300+ PHP versions simultaneously
<?php $cl = `substring('clgt',1,2)`; echo $cl

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)
5.4.320.0090.03312.46
5.4.310.0070.03712.47
5.4.300.0050.03812.46
5.4.290.0080.03712.46
5.4.280.0090.03412.36
5.4.270.0070.03512.36
5.4.260.0060.03712.36
5.4.250.0060.04112.36
5.4.240.0090.03812.36
5.4.230.0110.03512.36
5.4.220.0050.04012.36
5.4.210.0090.03212.36
5.4.200.0060.03712.36
5.4.190.0090.03212.35
5.4.180.0050.03612.35
5.4.170.0050.03712.36
5.4.160.0020.03912.35
5.4.150.0080.03612.35
5.4.140.0060.03612.04
5.4.130.0070.03612.02
5.4.120.0040.03711.98
5.4.110.0060.03511.98
5.4.100.0070.03511.98
5.4.90.0080.03511.98
5.4.80.0070.03611.98
5.4.70.0060.03511.98
5.4.60.0070.03411.98
5.4.50.0070.03411.98
5.4.40.0060.03411.97
5.4.30.0050.03611.96
5.4.20.0070.03811.96
5.4.10.0090.03311.96
5.4.00.0060.03811.46
5.3.290.0100.03812.80
5.3.280.0090.03612.71
5.3.270.0090.03612.72
5.3.260.0050.04312.72
5.3.250.0110.03412.72
5.3.240.0080.03912.72
5.3.230.0110.03612.70
5.3.220.0050.03812.68
5.3.210.0130.03312.68
5.3.200.0080.03512.68
5.3.190.0080.03512.68
5.3.180.0040.03812.68
5.3.170.0060.04712.66
5.3.160.0060.03812.68
5.3.150.0100.03612.67
5.3.140.0050.03912.66
5.3.130.0050.04012.66
5.3.120.0090.03612.66
5.3.110.0090.03712.65
5.3.100.0100.03412.11
5.3.90.0070.03712.08
5.3.80.0070.03612.08
5.3.70.0050.03812.07
5.3.60.0070.03612.06
5.3.50.0040.03712.00
5.3.40.0060.03912.00
5.3.30.0080.03911.95
5.3.20.0070.03611.73
5.3.10.0050.03511.70
5.3.00.0070.03511.68
5.2.170.0030.0329.18
5.2.160.0040.0309.18
5.2.150.0040.0319.18
5.2.140.0030.0329.18
5.2.130.0060.0299.14
5.2.120.0030.0329.14
5.2.110.0050.0299.15
5.2.100.0040.0299.14
5.2.90.0100.0249.14
5.2.80.0070.0289.14
5.2.70.0040.0319.14
5.2.60.0050.0309.09
5.2.50.0050.0309.06
5.2.40.0070.0269.04
5.2.30.0040.0309.02
5.2.20.0040.0299.01
5.2.10.0030.0308.93
5.2.00.0050.0288.78
5.1.60.0040.0248.07
5.1.50.0030.0268.07
5.1.40.0030.0258.05
5.1.30.0060.0248.40
5.1.20.0050.0258.41
5.1.10.0050.0268.14
5.1.00.0050.0248.14
5.0.50.0010.0226.63
5.0.40.0040.0186.48
5.0.30.0050.0306.29
5.0.20.0020.0226.26
5.0.10.0060.0196.24
5.0.00.0040.0316.23
4.4.90.0010.0194.78
4.4.80.0020.0164.76
4.4.70.0030.0154.75
4.4.60.0020.0164.75
4.4.50.0030.0154.77
4.4.40.0030.0244.71
4.4.30.0040.0154.75
4.4.20.0010.0174.84
4.4.10.0010.0174.85
4.4.00.0010.0264.76
4.3.110.0030.0154.66
4.3.100.0020.0174.66
4.3.90.0010.0164.63
4.3.80.0030.0234.59
4.3.70.0030.0144.63
4.3.60.0020.0154.63
4.3.50.0030.0204.63
4.3.40.0020.0254.53
4.3.30.0010.0173.29
4.3.20.0020.0163.27
4.3.10.0020.0153.22
4.3.00.0000.0237.10

preferences:
136.66 ms | 1394 KiB | 7 Q