3v4l.org

run code in 500+ PHP versions simultaneously
<?php class x { private array $config = array(); function __isset($name) { print __METHOD__." ".$name.PHP_EOL; return isset($this->config[$name]); } function __get($name) { print __METHOD__." ".$name.PHP_EOL; return 'a'; } } $x = new x; var_dump(isset($x->a)); var_dump(empty($x->a));

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)
8.5.100.0090.00618.87
8.5.90.0080.00617.80
8.5.80.0050.00317.70
8.5.70.0070.00517.77
8.5.60.0060.00717.80
8.5.50.0060.00717.48
8.5.40.0080.00918.61
8.5.30.0170.00917.57
8.5.20.0210.00717.52
8.5.10.0210.00717.71
8.5.00.0210.00517.49
8.4.250.0080.00321.36
8.4.240.0100.00720.52
8.4.230.0110.00520.41
8.4.220.0110.00623.59
8.4.210.0050.00620.36
8.4.200.0060.00421.38
8.4.190.0090.00921.45
8.4.180.0190.00820.61
8.4.170.0200.00620.52
8.4.160.0180.00820.61
8.4.150.0150.00920.42
8.4.140.0210.00818.53
8.4.130.0220.00618.33
8.4.120.0200.00418.62
8.4.110.0160.00618.74
8.4.100.0140.00618.75
8.4.90.0180.00618.73
8.4.80.0230.00718.68
8.4.70.0160.00818.70
8.4.60.0230.00718.75
8.4.50.0240.00518.63
8.4.40.0220.00818.54
8.4.30.0210.00818.77
8.4.20.0220.00818.71
8.4.10.0220.00818.63
8.3.330.0100.01019.35
8.3.320.0050.00520.24
8.3.310.0080.00219.42
8.3.300.0200.00619.08
8.3.290.0170.00519.05
8.3.280.0170.00619.29
8.3.270.0230.00817.63
8.3.260.0220.00817.54
8.3.250.0220.00717.51
8.3.240.0200.00817.63
8.3.230.0240.00517.58
8.3.220.0220.00417.67
8.3.210.0200.00817.65
8.3.200.0210.00717.47
8.3.190.0210.00717.48
8.3.180.0160.00517.54
8.3.170.0110.00317.51
8.3.160.0120.00317.53
8.3.150.0220.00617.55
8.3.140.0160.00717.55
8.3.130.0170.00417.54
8.3.120.0130.00417.58
8.3.110.0080.00517.63
8.3.100.0110.00417.62
8.3.90.0130.00617.55
8.3.80.0110.00417.55
8.3.70.0200.00517.50
8.3.60.0240.00917.59
8.3.50.0220.00817.58
8.3.40.0250.00618.89
8.3.30.0160.00918.75
8.3.20.0180.00918.82
8.3.10.0150.00818.89
8.3.00.0160.00818.83
8.2.330.0110.00819.90
8.2.320.0120.00718.94
8.2.310.0120.00619.06

preferences:
49.46 ms | 788 KiB | 5 Q