3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (isset($test) && $test != NULL) { echo '$test set and not null'; } else { echo '$test not set and not null'; } $test = ''; if (isset($test) && $test != NULL) { echo '$test set and not null'; } else { echo '$test not set and not null'; } if (isset($test)) { echo '$test set, even when null'); } $test = "abc"; if (isset($test) && $test != NULL) { echo '$test set and not null'; } else { echo '$test not set and not null'; }

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)
5.4.280.0080.04512.39
5.4.270.0070.04512.39
5.4.260.0080.04412.39
5.4.250.0070.04212.39
5.4.240.0070.04112.39
5.4.230.0070.04212.38
5.4.220.0050.04612.38
5.4.210.0070.04512.38
5.4.200.0070.04712.38
5.4.190.0070.04712.38
5.4.180.0080.04212.38
5.4.170.0070.03912.39
5.4.160.0080.04012.38
5.4.150.0090.04212.38
5.4.140.0060.04612.07
5.4.130.0070.03912.05
5.4.120.0100.04312.02
5.4.110.0070.04312.01
5.4.100.0060.04312.01
5.4.90.0090.04212.01
5.4.80.0090.04012.01
5.4.70.0050.04012.01
5.4.60.0070.03812.01
5.4.50.0090.03712.00
5.4.40.0080.03812.00
5.4.30.0060.04411.99
5.4.20.0080.03911.99
5.4.10.0060.04011.99
5.4.00.0060.04111.48
5.3.280.0080.04312.71
5.3.270.0070.04512.72
5.3.260.0080.04512.72
5.3.250.0070.04412.72
5.3.240.0070.04212.72
5.3.230.0070.04612.71
5.3.220.0070.04712.68
5.3.210.0090.04812.68
5.3.200.0110.04412.68
5.3.190.0070.04712.68
5.3.180.0100.04312.67
5.3.170.0080.04112.67
5.3.160.0090.04512.67
5.3.150.0080.04212.67
5.3.140.0060.04212.66
5.3.130.0080.04012.66
5.3.120.0080.04312.66
5.3.110.0070.04312.66
5.3.100.0100.03912.12
5.3.90.0090.04812.08
5.3.80.0090.04512.08
5.3.70.0080.04712.08
5.3.60.0110.04212.06
5.3.50.0080.04312.00
5.3.40.0080.04412.00
5.3.30.0090.04311.95
5.3.20.0080.04511.73
5.3.10.0080.04511.70
5.3.00.0060.04811.68

preferences:
136.07 ms | 1394 KiB | 7 Q