3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = array('key' => null, 'foo' => 0); var_dump(isset($data['key'])); // unsafe var_dump(isset($data['foo'])); // unsafe var_dump(array_key_exists('key', $data)); // better, but still unsafe var_dump(array_key_exists('key', $data) && $data['key']); // safe

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)
5.4.310.0200.04718.87
5.4.300.0130.06019.09
5.4.290.0200.07719.09
5.4.280.0130.07318.85
5.4.270.0200.06718.87
5.4.260.0300.05719.24
5.4.250.0200.07318.87
5.4.240.0200.05019.19
5.4.230.0170.04718.85
5.4.220.0200.07318.96
5.4.210.0230.05718.91
5.4.200.0130.05719.14
5.4.190.0270.06719.15
5.4.180.0230.03719.30
5.4.170.0170.03719.05
5.4.160.0230.07318.96
5.4.150.0200.05319.29
5.4.140.0200.07316.42
5.4.130.0270.06016.66
5.4.120.0200.07316.32
5.4.110.0170.04016.29
5.4.100.0200.05316.37
5.4.90.0200.03016.53
5.4.80.0200.05316.24
5.4.70.0130.07716.17
5.4.60.0070.05016.34
5.4.50.0200.07316.43
5.4.40.0100.07316.43
5.4.30.0230.06316.57
5.4.20.0170.07316.65
5.4.10.0270.06716.53
5.4.00.0170.06015.91
5.3.280.0200.07014.45
5.3.270.0130.04314.48
5.3.260.0170.08014.46
5.3.250.0270.04314.45
5.3.240.0130.05314.65
5.3.230.0130.08014.44
5.3.220.0200.06714.52
5.3.210.0130.08014.42
5.3.200.0230.06314.41
5.3.190.0070.08314.44
5.3.180.0170.07314.42
5.3.170.0200.03314.39
5.3.160.0130.06714.47
5.3.150.0170.07714.40
5.3.140.0170.05014.40
5.3.130.0130.06314.59
5.3.120.0100.05714.44
5.3.110.0200.03014.45
5.3.100.0100.04013.88
5.3.90.0170.07314.00
5.3.80.0100.06013.79
5.3.70.0130.07713.96
5.3.60.0170.04313.88
5.3.50.0130.03713.80
5.3.40.0230.05013.85
5.3.30.0230.05313.88
5.3.20.0200.07013.64
5.3.10.0200.06713.61
5.3.00.0200.07313.72
5.2.170.0130.02712.08
5.2.160.0130.06012.08
5.2.150.0230.05312.08
5.2.140.0100.03312.08
5.2.130.0130.06312.08
5.2.120.0200.05312.08
5.2.110.0100.05712.08
5.2.100.0170.05712.08
5.2.90.0300.02712.08
5.2.80.0130.04712.08
5.2.70.0170.02712.08
5.2.60.0170.05712.08
5.2.50.0130.05712.08
5.2.40.0130.04712.08
5.2.30.0100.03312.08
5.2.20.0100.03312.08
5.2.10.0100.06012.08
5.2.00.0170.05712.08
5.1.60.0130.04312.08
5.1.50.0130.03312.08
5.1.40.0170.04712.08
5.1.30.0100.03712.08
5.1.20.0070.06012.08
5.1.10.0100.05312.08
5.1.00.0170.02712.08
5.0.50.0030.03012.08
5.0.40.0030.02712.08
5.0.30.0070.03312.08
5.0.20.0130.02012.08
5.0.10.0030.02712.08
5.0.00.0100.06012.08
4.4.90.0000.02312.08
4.4.80.0030.03712.08
4.4.70.0030.02012.08
4.4.60.0030.01712.08
4.4.50.0100.03012.08
4.4.40.0130.04012.08
4.4.30.0130.02012.08
4.4.20.0070.03012.08
4.4.10.0100.03012.08
4.4.00.0030.05712.08
4.3.110.0000.02312.08
4.3.100.0100.03312.08
4.3.90.0130.02712.08
4.3.80.0130.04312.08
4.3.70.0100.02012.08
4.3.60.0070.01712.08
4.3.50.0070.01712.08
4.3.40.0030.05712.08
4.3.30.0030.02312.08
4.3.20.0030.03712.08
4.3.10.0000.04012.08
4.3.00.0000.03012.08

preferences:
140.28 ms | 1394 KiB | 7 Q