3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ['a'=>''] var_dump(empty('')); var_dump(empty(null)); var_dump(empty($a['a'])); var_dump(empty($a['b']));

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)
5.4.250.0080.03512.37
5.4.240.0050.03612.37
5.4.230.0030.04012.36
5.4.220.0040.03612.36
5.4.210.0060.03512.36
5.4.200.0070.03912.36
5.4.190.0040.03912.36
5.4.180.0050.03812.36
5.4.170.0040.04112.37
5.4.160.0040.03912.36
5.4.150.0070.04012.36
5.4.140.0050.04212.04
5.4.130.0070.03512.03
5.4.120.0090.03311.99
5.4.110.0050.03611.98
5.4.100.0050.03511.99
5.4.90.0070.03511.99
5.4.80.0050.03811.99
5.4.70.0080.03411.98
5.4.60.0090.03511.98
5.4.50.0060.03611.98
5.4.40.0080.03811.97
5.4.30.0060.03511.97
5.4.20.0050.03511.96
5.4.10.0070.03511.97
5.4.00.0060.04111.46
5.3.280.0070.03912.71
5.3.270.0090.04112.72
5.3.260.0070.04112.72
5.3.250.0040.03812.72
5.3.240.0060.04012.72
5.3.230.0070.04112.71
5.3.220.0070.03512.68
5.3.210.0060.04212.68
5.3.200.0080.03612.68
5.3.190.0050.03712.67
5.3.180.0040.03912.67
5.3.170.0040.04112.67
5.3.160.0090.03412.67
5.3.150.0040.04112.67
5.3.140.0070.03612.66
5.3.130.0070.03912.66
5.3.120.0040.04212.66
5.3.110.0050.03912.66
5.3.100.0050.03612.12
5.3.90.0070.03812.08
5.3.80.0090.03812.07
5.3.70.0060.03512.08
5.3.60.0040.03812.06
5.3.50.0070.03612.00
5.3.40.0050.03612.00
5.3.30.0040.03611.94
5.3.20.0040.03711.71
5.3.10.0030.03811.67
5.3.00.0080.03511.66
5.2.170.0040.0319.16
5.2.160.0040.0309.16
5.2.150.0050.0319.17
5.2.140.0030.0359.16
5.2.130.0070.0329.12
5.2.120.0040.0299.12
5.2.110.0050.0299.13
5.2.100.0040.0329.12
5.2.90.0050.0319.12
5.2.80.0050.0309.11
5.2.70.0050.0349.11
5.2.60.0030.0329.07
5.2.50.0040.0329.04
5.2.40.0040.0299.02
5.2.30.0050.0288.99
5.2.20.0050.0318.98
5.2.10.0050.0278.90
5.2.00.0060.0328.76
5.1.60.0050.0238.05
5.1.50.0040.0258.05
5.1.40.0040.0268.03
5.1.30.0040.0278.38
5.1.20.0040.0258.40
5.1.10.0030.0278.13
5.1.00.0080.0258.13
5.0.50.0050.0196.60
5.0.40.0040.0186.46
5.0.30.0040.0306.28
5.0.20.0040.0186.24
5.0.10.0020.0216.22
5.0.00.0020.0326.21
4.4.90.0030.0184.78
4.4.80.0030.0204.76
4.4.70.0020.0194.75
4.4.60.0020.0184.76
4.4.50.0020.0164.77
4.4.40.0040.0264.71
4.4.30.0040.0164.76
4.4.20.0030.0174.84
4.4.10.0020.0194.85
4.4.00.0030.0254.76
4.3.110.0040.0144.67
4.3.100.0030.0164.67
4.3.90.0040.0164.63
4.3.80.0020.0254.59
4.3.70.0030.0144.63
4.3.60.0030.0144.63
4.3.50.0040.0144.63
4.3.40.0040.0234.54
4.3.30.0020.0153.28
4.3.20.0030.0173.26
4.3.10.0010.0173.21
4.3.00.0000.0277.54

preferences:
130.59 ms | 1394 KiB | 7 Q