3v4l.org

run code in 300+ PHP versions simultaneously
<?php $header = array('test'); if (isset($header[0]['class']) key_exists('class', $header[0])) { echo 'set'; } else { echo 'not set'; }

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)
5.4.320.0070.03912.50
5.4.310.0080.04612.50
5.4.300.0060.05112.50
5.4.290.0080.05112.50
5.4.280.0140.04112.39
5.4.270.0050.04012.39
5.4.260.0050.04312.39
5.4.250.0050.03912.39
5.4.240.0020.04012.39
5.4.230.0040.04112.38
5.4.220.0040.03712.38
5.4.210.0080.03512.38
5.4.200.0050.04012.38
5.4.190.0070.03712.38
5.4.180.0090.04312.38
5.4.170.0060.03912.38
5.4.160.0090.03512.38
5.4.150.0060.03812.38
5.4.140.0050.03912.07
5.4.130.0060.03612.05
5.4.120.0070.03412.02
5.4.110.0050.03612.02
5.4.100.0070.03412.01
5.4.90.0090.03312.01
5.4.80.0050.03712.01
5.4.70.0040.05012.00
5.4.60.0020.04012.01
5.4.50.0070.04212.01
5.4.40.0070.03411.99
5.4.30.0060.04312.00
5.4.20.0060.03811.98
5.4.10.0070.03211.99
5.4.00.0070.04711.49
5.3.290.0090.04112.80
5.3.280.0070.03912.71
5.3.270.0070.04312.72
5.3.260.0040.04012.71
5.3.250.0070.03512.72
5.3.240.0050.03812.72
5.3.230.0100.03512.71
5.3.220.0040.03812.68
5.3.210.0100.03612.68
5.3.200.0080.03512.68
5.3.190.0120.03312.68
5.3.180.0060.03612.67
5.3.170.0090.03412.67
5.3.160.0050.03812.67
5.3.150.0080.03512.67
5.3.140.0060.03612.66
5.3.130.0060.04112.66
5.3.120.0070.03812.66
5.3.110.0060.04312.66
5.3.100.0030.04012.12
5.3.90.0060.03812.09
5.3.80.0040.03912.08
5.3.70.0030.04012.08
5.3.60.0060.03612.06
5.3.50.0080.03312.00
5.3.40.0050.03712.00
5.3.30.0050.03811.95
5.3.20.0080.03611.72
5.3.10.0090.03211.70
5.3.00.0080.03411.69
5.2.170.0020.0339.18
5.2.160.0040.0309.19
5.2.150.0040.0309.18
5.2.140.0030.0369.19
5.2.130.0050.0309.14
5.2.120.0050.0289.14
5.2.110.0040.0359.15
5.2.100.0060.0269.14
5.2.90.0050.0289.14
5.2.80.0040.0309.14
5.2.70.0090.0269.14
5.2.60.0050.0309.09
5.2.50.0060.0299.06
5.2.40.0040.0299.04
5.2.30.0040.0319.02
5.2.20.0060.0269.00
5.2.10.0050.0278.93
5.2.00.0030.0308.78
5.1.60.0050.0248.07
5.1.50.0030.0268.06
5.1.40.0050.0248.05
5.1.30.0030.0278.40
5.1.20.0040.0278.42
5.1.10.0050.0258.14
5.1.00.0060.0248.14
5.0.50.0030.0216.62
5.0.40.0020.0206.48
5.0.30.0030.0316.29
5.0.20.0040.0196.27
5.0.10.0030.0206.24
5.0.00.0040.0386.23
4.4.90.0020.0164.78
4.4.80.0030.0144.76
4.4.70.0040.0144.75
4.4.60.0030.0194.75
4.4.50.0040.0154.77
4.4.40.0070.0234.71
4.4.30.0020.0164.76
4.4.20.0020.0164.84
4.4.10.0040.0144.84
4.4.00.0040.0244.76
4.3.110.0060.0284.67
4.3.100.0010.0184.66
4.3.90.0050.0134.64
4.3.80.0030.0284.59
4.3.70.0050.0114.63
4.3.60.0050.0154.63
4.3.50.0030.0154.62
4.3.40.0040.0224.54
4.3.30.0030.0153.28
4.3.20.0020.0173.26
4.3.10.0000.0193.22
4.3.00.0030.01313.60

preferences:
133.77 ms | 1398 KiB | 7 Q