3v4l.org

run code in 300+ PHP versions simultaneously
<?php $heading = 'h2'; echo ++$heading; echo $heading

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)
5.4.310.0060.03712.46
5.4.300.0100.03312.47
5.4.290.0030.04012.46
5.4.280.0080.03312.36
5.4.270.0040.03712.36
5.4.260.0030.04012.36
5.4.250.0030.04112.36
5.4.240.0060.03512.36
5.4.230.0030.04012.35
5.4.220.0060.03612.35
5.4.210.0060.03612.36
5.4.200.0050.03912.35
5.4.190.0050.03612.35
5.4.180.0060.03512.35
5.4.170.0040.03812.36
5.4.160.0050.03712.35
5.4.150.0090.03212.35
5.4.140.0030.03912.04
5.4.130.0050.03612.02
5.4.120.0020.03811.99
5.4.110.0050.03711.98
5.4.100.0090.03211.98
5.4.90.0060.03811.98
5.4.80.0060.03711.98
5.4.70.0070.03211.98
5.4.60.0040.04611.98
5.4.50.0050.04611.98
5.4.40.0010.03811.97
5.4.30.0040.03611.96
5.4.20.0060.03411.96
5.4.10.0050.03511.96
5.4.00.0070.03411.46
5.3.280.0070.03612.71
5.3.270.0070.03712.72
5.3.260.0080.03512.72
5.3.250.0050.03712.72
5.3.240.0100.03612.72
5.3.230.0080.04712.71
5.3.220.0050.05312.68
5.3.210.0070.05312.68
5.3.200.0040.05312.68
5.3.190.0080.04812.68
5.3.180.0080.04912.67
5.3.170.0050.05112.67
5.3.160.0080.05012.67
5.3.150.0070.05012.67
5.3.140.0040.03712.66
5.3.130.0010.04612.66
5.3.120.0090.04712.66
5.3.110.0070.03912.66
5.3.100.0060.04612.11
5.3.90.0030.03912.09
5.3.80.0080.03512.07
5.3.70.0060.04012.08
5.3.60.0080.03912.07
5.3.50.0060.03512.00
5.3.40.0060.03512.00
5.3.30.0060.03411.95
5.3.20.0050.03511.73
5.3.10.0030.03711.70
5.3.00.0040.03811.68
5.2.170.0020.0359.18
5.2.160.0050.0389.18
5.2.150.0070.0369.18
5.2.140.0060.0389.18
5.2.130.0060.0379.14
5.2.120.0080.0339.13
5.2.110.0050.0339.15
5.2.100.0110.0319.14
5.2.90.0050.0329.14
5.2.80.0040.0369.14
5.2.70.0100.0319.14
5.2.60.0040.0339.09
5.2.50.0050.0299.06
5.2.40.0030.0309.04
5.2.30.0030.0319.02
5.2.20.0030.0309.00
5.2.10.0050.0278.93
5.2.00.0060.0278.78
5.1.60.0070.0208.07
5.1.50.0050.0238.06
5.1.40.0040.0248.05
5.1.30.0040.0288.40
5.1.20.0070.0278.42
5.1.10.0060.0278.14
5.1.00.0070.0238.14
5.0.50.0060.0186.62
5.0.40.0030.0196.48
5.0.30.0030.0316.29
5.0.20.0040.0196.26
5.0.10.0040.0216.24
5.0.00.0020.0366.23
4.4.90.0030.0154.78
4.4.80.0040.0144.75
4.4.70.0050.0144.75
4.4.60.0050.0154.76
4.4.50.0030.0204.77
4.4.40.0010.0274.71
4.4.30.0020.0174.76
4.4.20.0050.0164.85
4.4.10.0020.0164.85
4.4.00.0050.0274.76
4.3.110.0040.0154.67
4.3.100.0030.0184.67
4.3.90.0030.0154.63
4.3.80.0030.0264.58
4.3.70.0010.0224.63
4.3.60.0010.0154.63
4.3.50.0020.0224.63
4.3.40.0010.0284.54
4.3.30.0010.0173.29
4.3.20.0040.0153.27
4.3.10.0030.0153.21
4.3.00.0030.0207.12

preferences:
140.34 ms | 1394 KiB | 7 Q