3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (isset(!$i1)){ print "\$i1 is assigned a value"; } else { print "\$i1 does not exist or has no value assigned to"; }

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)
5.4.290.0090.05312.50
5.4.280.0080.05112.39
5.4.270.0110.04212.39
5.4.260.0080.03812.39
5.4.250.0050.04012.39
5.4.240.0070.03512.39
5.4.230.0030.04112.38
5.4.220.0070.03712.38
5.4.210.0090.03412.38
5.4.200.0080.03912.38
5.4.190.0050.03912.38
5.4.180.0110.03612.38
5.4.170.0060.05412.39
5.4.160.0080.04412.38
5.4.150.0100.04712.38
5.4.140.0080.03912.07
5.4.130.0060.04012.05
5.4.120.0110.03712.02
5.4.110.0080.03712.01
5.4.100.0080.03712.01
5.4.90.0080.03912.01
5.4.80.0090.03712.01
5.4.70.0030.03812.01
5.4.60.0040.03712.01
5.4.50.0060.03512.01
5.4.40.0070.03612.00
5.4.30.0100.04611.99
5.4.20.0090.04611.99
5.4.10.0080.04911.99
5.4.00.0040.06011.48
5.3.280.0170.05312.71
5.3.270.0070.06012.72
5.3.260.0100.03812.72
5.3.250.0070.03812.72
5.3.240.0040.04112.72
5.3.230.0030.04312.70
5.3.220.0060.04012.68
5.3.210.0090.03912.68
5.3.200.0080.03612.68
5.3.190.0060.03712.68
5.3.180.0050.03712.67
5.3.170.0050.03812.67
5.3.160.0070.03512.68
5.3.150.0090.04212.67
5.3.140.0080.03712.66
5.3.130.0100.03612.65
5.3.120.0040.04212.66
5.3.110.0070.03912.66
5.3.100.0050.04012.12
5.3.90.0030.04212.08
5.3.80.0120.03312.08
5.3.70.0030.04012.07
5.3.60.0080.03812.06
5.3.50.0060.03812.00
5.3.40.0100.03312.00
5.3.30.0040.03811.95
5.3.20.0050.03611.73
5.3.10.0050.03711.70
5.3.00.0060.03611.68
5.2.170.0060.0299.18
5.2.160.0050.0329.18
5.2.150.0060.0309.18
5.2.140.0050.0319.18
5.2.130.0070.0289.14
5.2.120.0050.0289.14
5.2.110.0040.0309.14
5.2.100.0030.0309.14
5.2.90.0060.0289.14
5.2.80.0050.0329.14
5.2.70.0060.0299.14
5.2.60.0030.0329.09
5.2.50.0050.0469.05
5.2.40.0030.0349.04
5.2.30.0060.0329.01
5.2.20.0040.0339.00
5.2.10.0080.0258.92
5.2.00.0030.0338.78
5.1.60.0060.0248.06
5.1.50.0020.0288.06
5.1.40.0050.0238.04
5.1.30.0050.0258.40
5.1.20.0060.0258.42
5.1.10.0040.0268.14
5.1.00.0040.0268.14
5.0.50.0030.0206.63
5.0.40.0050.0196.48
5.0.30.0030.0336.29
5.0.20.0010.0226.27
5.0.10.0070.0176.23
5.0.00.0050.0296.23
4.4.90.0050.0154.78
4.4.80.0020.0164.76
4.4.70.0020.0174.76
4.4.60.0010.0184.75
4.4.50.0050.0184.77
4.4.40.0040.0294.71
4.4.30.0050.0134.76
4.4.20.0020.0184.85
4.4.10.0040.0164.85
4.4.00.0040.0244.76
4.3.110.0020.0164.67
4.3.100.0020.0164.66
4.3.90.0020.0154.63
4.3.80.0030.0254.58
4.3.70.0040.0144.63
4.3.60.0030.0154.63
4.3.50.0050.0174.63
4.3.40.0050.0254.54
4.3.30.0030.0153.29
4.3.20.0010.0183.27
4.3.10.0040.0143.22
4.3.00.0070.0279.40

preferences:
142.39 ms | 1394 KiB | 7 Q