3v4l.org

run code in 300+ PHP versions simultaneously
<?php $exists = isset($a); if($exists) echo "SI" else var_dump("NO");

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)
5.4.320.0040.03912.49
5.4.310.0040.04312.49
5.4.300.0040.03912.49
5.4.290.0070.03912.49
5.4.280.0090.03612.39
5.4.270.0040.04112.39
5.4.260.0050.04012.39
5.4.250.0090.03612.39
5.4.240.0090.03912.39
5.4.230.0050.03912.38
5.4.220.0070.03412.38
5.4.210.0070.03312.38
5.4.200.0080.04312.38
5.4.190.0070.04212.38
5.4.180.0070.03612.38
5.4.170.0100.03512.39
5.4.160.0070.03812.38
5.4.150.0070.03512.38
5.4.140.0060.03612.07
5.4.130.0080.03412.05
5.4.120.0040.03712.01
5.4.110.0090.03212.01
5.4.100.0080.03212.01
5.4.90.0080.03412.01
5.4.80.0030.03912.02
5.4.70.0070.03412.01
5.4.60.0070.03312.01
5.4.50.0060.03912.01
5.4.40.0070.03711.99
5.4.30.0040.03711.99
5.4.20.0050.03611.98
5.4.10.0020.03811.99
5.4.00.0100.03211.49
5.3.290.0050.04112.80
5.3.280.0120.03212.71
5.3.270.0070.03812.73
5.3.260.0050.04012.72
5.3.250.0030.04012.72
5.3.240.0070.03712.72
5.3.230.0080.03812.71
5.3.220.0090.03412.68
5.3.210.0040.04012.68
5.3.200.0050.03812.68
5.3.190.0070.03612.68
5.3.180.0050.03912.68
5.3.170.0060.03712.67
5.3.160.0050.05212.67
5.3.150.0070.05312.67
5.3.140.0070.03612.66
5.3.130.0070.03712.66
5.3.120.0050.04012.66
5.3.110.0110.03412.66
5.3.100.0040.03912.12
5.3.90.0040.03712.09
5.3.80.0050.03612.08
5.3.70.0090.03912.08
5.3.60.0070.03512.06
5.3.50.0050.03612.00
5.3.40.0080.03312.00
5.3.30.0040.03611.95
5.3.20.0060.03511.73
5.3.10.0050.03511.70
5.3.00.0030.03911.69
5.2.170.0080.0279.18
5.2.160.0060.0329.18
5.2.150.0080.0319.18
5.2.140.0040.0329.18
5.2.130.0070.0279.14
5.2.120.0090.0289.14
5.2.110.0080.0259.15
5.2.100.0050.0279.14
5.2.90.0030.0309.14
5.2.80.0070.0289.14
5.2.70.0040.0319.14
5.2.60.0050.0319.09
5.2.50.0050.0319.06
5.2.40.0040.0319.04
5.2.30.0060.0289.01
5.2.20.0060.0279.00
5.2.10.0050.0278.93
5.2.00.0080.0258.78
5.1.60.0090.0218.07
5.1.50.0060.0238.06
5.1.40.0070.0228.05
5.1.30.0060.0238.40
5.1.20.0040.0268.42
5.1.10.0040.0328.14
5.1.00.0060.0288.14
5.0.50.0020.0246.62
5.0.40.0050.0196.48
5.0.30.0030.0326.29
5.0.20.0030.0206.26
5.0.10.0030.0216.24
5.0.00.0060.0326.23
4.4.90.0020.0234.78
4.4.80.0020.0234.76
4.4.70.0030.0184.75
4.4.60.0030.0224.75
4.4.50.0050.0224.77
4.4.40.0040.0334.71
4.4.30.0020.0214.76
4.4.20.0030.0234.85
4.4.10.0060.0174.85
4.4.00.0040.0294.76
4.3.110.0010.0224.67
4.3.100.0040.0214.66
4.3.90.0040.0214.64
4.3.80.0030.0324.58
4.3.70.0070.0184.63
4.3.60.0010.0234.63
4.3.50.0050.0194.63
4.3.40.0020.0274.54
4.3.30.0010.0173.29
4.3.20.0020.0163.27
4.3.10.0010.0163.21
4.3.00.0030.01716.72

preferences:
142.49 ms | 1394 KiB | 7 Q