3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'Lorem ipsum'; var_dump($str[0]); var_dump(substr($str, 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)
5.4.310.0080.03612.46
5.4.300.0050.03612.47
5.4.290.0080.03512.46
5.4.280.0080.03312.36
5.4.270.0060.03612.36
5.4.260.0060.03712.36
5.4.250.0050.03812.36
5.4.240.0080.03312.36
5.4.230.0060.03812.35
5.4.220.0050.04312.35
5.4.210.0050.03512.35
5.4.200.0060.04012.35
5.4.190.0060.03512.34
5.4.180.0090.04412.35
5.4.170.0080.04212.36
5.4.160.0060.03612.36
5.4.150.0050.03712.35
5.4.140.0070.03612.04
5.4.130.0030.03912.02
5.4.120.0060.03611.98
5.4.110.0050.03611.98
5.4.100.0050.03611.98
5.4.90.0050.03711.98
5.4.80.0090.03411.98
5.4.70.0030.03511.97
5.4.60.0060.03411.97
5.4.50.0070.03411.97
5.4.40.0080.03111.96
5.4.30.0040.03711.96
5.4.20.0060.03511.95
5.4.10.0080.03211.96
5.4.00.0080.03711.45
5.3.280.0060.03812.71
5.3.270.0040.04112.72
5.3.260.0060.03812.72
5.3.250.0030.03912.72
5.3.240.0120.03112.72
5.3.230.0070.03912.71
5.3.220.0050.04112.68
5.3.210.0070.03812.68
5.3.200.0080.03412.68
5.3.190.0080.03512.67
5.3.180.0050.03712.67
5.3.170.0030.03912.67
5.3.160.0060.03712.67
5.3.150.0070.03612.67
5.3.140.0080.03412.66
5.3.130.0060.03812.66
5.3.120.0070.03812.66
5.3.110.0070.03612.66
5.3.100.0030.03912.12
5.3.90.0050.03712.08
5.3.80.0050.03612.07
5.3.70.0020.04012.08
5.3.60.0050.03712.07
5.3.50.0050.03712.00
5.3.40.0080.03412.00
5.3.30.0070.03311.95
5.3.20.0040.03711.72
5.3.10.0060.03511.70
5.3.00.0100.03211.68
5.2.170.0060.0299.18
5.2.160.0070.0319.19
5.2.150.0090.0389.19
5.2.140.0060.0309.18
5.2.130.0020.0329.14
5.2.120.0080.0259.14
5.2.110.0060.0279.15
5.2.100.0050.0299.14
5.2.90.0070.0309.14
5.2.80.0040.0299.14
5.2.70.0020.0329.14
5.2.60.0070.0279.09
5.2.50.0050.0289.06
5.2.40.0040.0329.04
5.2.30.0030.0319.01
5.2.20.0030.0339.00
5.2.10.0030.0308.93
5.2.00.0050.0408.78
5.1.60.0050.0238.07
5.1.50.0070.0308.07
5.1.40.0040.0358.05
5.1.30.0100.0318.39
5.1.20.0050.0268.42
5.1.10.0050.0268.15
5.1.00.0080.0258.14
5.0.50.0050.0206.63
5.0.40.0070.0236.48
5.0.30.0060.0296.30
5.0.20.0040.0186.26
5.0.10.0040.0196.24
5.0.00.0060.0286.23
4.4.90.0060.0124.78
4.4.80.0020.0164.76
4.4.70.0030.0154.75
4.4.60.0040.0144.76
4.4.50.0020.0164.77
4.4.40.0020.0254.71
4.4.30.0010.0174.76
4.4.20.0040.0144.84
4.4.10.0020.0164.85
4.4.00.0060.0214.76
4.3.110.0030.0154.67
4.3.100.0040.0144.66
4.3.90.0040.0174.64
4.3.80.0030.0254.59
4.3.70.0040.0194.63
4.3.60.0010.0194.63
4.3.50.0030.0154.63
4.3.40.0040.0234.53
4.3.30.0030.0153.28
4.3.20.0020.0163.26
4.3.10.0050.0133.21
4.3.00.0030.01715.27

preferences:
138.16 ms | 1394 KiB | 7 Q