3v4l.org

run code in 300+ PHP versions simultaneously
<?php $nullvar = array( 0 => array('a' => array('r' => null)), 1 => array('a' => array('r' => null)), ); if (isset($nullvar[0]['a'])) { echo "set"; } else { echo "not set"; } if (is_null($nullvar[0]['a'])) { echo "\nnull"; } else { echo "\nnot 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)
8.3.60.0180.00416.50
8.3.50.0170.00217.25
8.3.40.0060.00918.88
8.3.30.0090.00618.81
8.3.20.0100.00618.58
8.3.10.0040.00418.79
8.3.00.0060.00319.25
8.2.180.0100.00316.50
8.2.170.0070.01022.96
8.2.160.0100.00320.52
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0000.00820.88
8.2.110.0060.00321.10
8.2.100.0080.00417.97
8.2.90.0050.00319.21
8.2.80.0040.00419.38
8.2.70.0030.00517.63
8.2.60.0000.00818.05
8.2.50.0040.00418.07
8.2.40.0000.00718.16
8.2.30.0040.00417.91
8.2.20.0070.00317.54
8.2.10.0000.00717.67
8.2.00.0000.00917.57
8.1.280.0060.00925.92
8.1.270.0040.00424.66
8.1.260.0090.00026.35
8.1.250.0040.00428.09
8.1.240.0030.00921.84
8.1.230.0080.00320.90
8.1.220.0030.00518.77
8.1.210.0060.00319.09
8.1.200.0100.00017.23
8.1.190.0040.00417.16
8.1.180.0100.00018.10
8.1.170.0030.00618.90
8.1.160.0050.00218.69
8.1.150.0000.00718.44
8.1.140.0040.00417.23
8.1.130.0030.00317.73
8.1.120.0030.00717.30
8.1.110.0020.00517.28
8.1.100.0030.00317.43
8.1.90.0000.00817.39
8.1.80.0050.00317.30
8.1.70.0030.00317.27
8.1.60.0090.00317.39
8.1.50.0090.00017.41
8.1.40.0040.00417.34
8.1.30.0000.00817.55
8.1.20.0000.00817.57
8.1.10.0040.00417.61
8.1.00.0000.00717.46
8.0.300.0090.00020.00
8.0.290.0040.00416.75
8.0.280.0030.00518.48
8.0.270.0040.00417.22
8.0.260.0000.00716.82
8.0.250.0050.00216.90
8.0.240.0080.00016.86
8.0.230.0000.00716.93
8.0.220.0070.00016.81
8.0.210.0000.00716.88
8.0.200.0060.00016.87
8.0.190.0040.00416.87
8.0.180.0040.00416.80
8.0.170.0070.00316.78
8.0.160.0030.00516.82
8.0.150.0040.00416.62
8.0.140.0030.00616.77
8.0.130.0060.00013.24
8.0.120.0000.00816.68
8.0.110.0030.00516.83
8.0.100.0030.00516.61
8.0.90.0000.00716.91
8.0.80.0070.00716.80
8.0.70.0080.00016.81
8.0.60.0030.00516.67
8.0.50.0000.00716.84
8.0.30.0160.00316.99
8.0.20.0100.00717.19
8.0.10.0000.00716.99
8.0.00.0080.01016.72
7.4.330.0030.00312.91
7.4.320.0030.00316.44
7.4.300.0030.00316.43
7.4.290.0030.00316.52
7.4.280.0000.00716.48
7.4.270.0040.00416.44
7.4.260.0000.00513.20
7.4.250.0060.00316.37
7.4.240.0040.00416.53
7.4.230.0000.00716.47
7.4.220.0170.01116.41
7.4.210.0070.01016.50
7.4.200.0000.00916.37
7.4.190.0000.00716.57
7.4.160.0120.00416.39
7.4.150.0070.01116.48
7.4.140.0080.00816.52
7.4.130.0080.00816.44
7.4.120.0050.01416.58
7.4.110.0100.00716.54
7.4.100.0100.00916.57
7.4.90.0090.01216.28
7.4.80.0080.00819.39
7.4.70.0030.01916.34
7.4.60.0070.01016.45
7.4.50.0060.00316.38
7.4.40.0070.00716.53
7.4.30.0130.01016.44
7.4.00.0070.01214.85
7.3.330.0000.00613.18
7.3.320.0060.00013.05
7.3.310.0000.00716.15
7.3.300.0030.00316.16
7.3.290.0060.00916.30
7.3.280.0070.00916.32
7.3.270.0120.00616.19
7.3.260.0100.00716.23
7.3.250.0120.00616.34
7.3.240.0060.00916.53
7.3.230.0070.01016.50
7.3.210.0150.00616.26
7.3.200.0070.01016.51
7.3.190.0130.00316.49
7.3.180.0060.00916.27
7.3.170.0070.01316.43
7.3.160.0130.01016.41
7.3.120.0030.01514.63
7.3.110.0030.01014.77
7.3.100.0090.00914.73
7.3.90.0060.00914.88
7.3.80.0060.00614.91
7.3.70.0030.00614.92
7.3.60.0090.00314.89
7.3.50.0030.01014.80
7.3.40.0080.00814.67
7.3.30.0100.00314.91
7.3.20.0000.01416.78
7.3.10.0090.00016.59
7.3.00.0100.00316.60
7.2.330.0170.00716.68
7.2.320.0090.00916.58
7.2.310.0060.01216.36
7.2.300.0100.00616.44
7.2.290.0070.01016.50
7.2.250.0000.01414.59
7.2.240.0100.01014.94
7.2.230.0100.00714.97
7.2.220.0100.00715.10
7.2.210.0130.00314.84
7.2.200.0060.00614.82
7.2.190.0080.00414.84
7.2.180.0090.00614.82
7.2.170.0000.01115.04
7.2.60.0030.01016.82
7.2.00.0040.01119.17
7.1.330.0070.00715.62
7.1.320.0060.01015.82
7.1.310.0060.00315.79
7.1.300.0000.01415.53
7.1.290.0120.00315.61
7.1.280.0000.01215.72
7.1.270.0030.01015.76
7.1.260.0110.00415.69
7.1.200.0000.00815.50
7.1.70.0000.00917.18
7.1.60.0090.01619.40
7.1.50.0100.01016.99
7.1.00.0030.03322.31
7.0.200.0170.00714.86
7.0.140.0030.07022.07
7.0.120.0070.07022.08
7.0.60.0070.04720.02
7.0.50.0030.04017.85
7.0.40.0030.04017.73
7.0.30.0070.03717.74
7.0.20.0070.03717.69
7.0.10.0030.04017.73
7.0.00.0000.05317.70
5.6.210.0100.08020.47
5.6.200.0030.04018.22
5.6.190.0030.04018.18
5.6.180.0000.05018.11
5.6.170.0070.03718.15
5.6.160.0030.04018.12
5.6.150.0030.04018.09
5.6.140.0030.04018.21
5.6.130.0070.03718.18
5.6.120.0030.04318.20
5.6.110.0070.09018.11
5.6.100.0070.07718.15
5.6.90.0100.03718.08
5.6.80.0030.04717.48
5.6.70.0100.03317.49
5.6.60.0100.07717.54
5.6.50.0100.06317.49
5.6.40.0030.07017.54
5.6.30.0030.07317.53
5.6.20.0000.06317.56
5.6.10.0030.04317.48
5.6.00.0130.07017.53
5.5.350.0370.06320.44
5.5.340.0000.04318.02
5.5.330.0070.03718.02
5.5.320.0030.04017.88
5.5.310.0000.04017.89
5.5.300.0000.04317.90
5.5.290.0100.03317.95
5.5.280.0030.08718.02
5.5.270.0070.07017.97
5.5.260.0130.08017.88
5.5.250.0070.08317.81
5.5.240.0000.04317.28
5.5.230.0100.03717.39
5.5.220.0070.07317.32
5.5.210.0030.05017.36
5.5.200.0030.08017.31
5.5.190.0030.08017.33
5.5.180.0030.08017.35
5.5.160.0130.07317.30
5.5.150.0070.07717.27
5.5.140.0070.07317.36
5.5.130.0000.08717.36
5.5.120.0000.04317.38
5.5.110.0070.07317.26
5.5.100.0070.07017.27
5.5.90.0030.07017.25
5.5.80.0130.07017.13
5.5.70.0070.04317.11
5.5.60.0070.07317.15
5.5.50.0100.04017.12
5.5.40.0070.04717.26
5.5.30.0070.08017.13
5.5.20.0130.06717.10
5.5.10.0000.04717.22
5.5.00.0030.08317.14
5.4.450.0000.04319.22
5.4.440.0170.07319.36
5.4.430.0130.07719.43
5.4.420.0170.07019.35
5.4.410.0230.03319.19
5.4.400.0030.07719.08
5.4.390.0000.04319.12
5.4.380.0100.07718.82
5.4.370.0070.05019.01
5.4.360.0170.03718.97
5.4.350.0070.07718.98
5.4.340.0030.06318.82
5.4.320.0070.05018.99
5.4.310.0200.06718.98
5.4.300.0030.07319.09
5.4.290.0070.07718.99
5.4.280.0000.04319.12
5.4.270.0170.06018.99
5.4.260.0130.06719.00
5.4.250.0070.05718.98
5.4.240.0170.05318.94
5.4.230.0000.04319.02
5.4.220.0100.07319.11
5.4.210.0030.07719.09
5.4.200.0030.07018.95
5.4.190.0070.07318.98
5.4.180.0100.04019.03
5.4.170.0070.04318.96
5.4.160.0030.03719.01
5.4.150.0070.04018.97
5.4.140.0100.06716.34
5.4.130.0130.06716.17
5.4.120.0000.07316.47
5.4.110.0000.05016.17
5.4.100.0100.07316.45
5.4.90.0070.05716.34
5.4.80.0070.07016.35
5.4.70.0100.03716.51
5.4.60.0030.04316.36
5.4.50.0070.03716.25
5.4.40.0030.04316.38
5.4.30.0130.06716.49
5.4.20.0070.06316.23
5.4.10.0100.06716.34
5.4.00.0070.07015.79
5.3.290.0070.08314.61
5.3.280.0130.05014.52
5.3.270.0100.07014.55
5.3.260.0070.04014.57
5.3.250.0000.04714.42
5.3.240.0070.05714.43
5.3.230.0030.07714.45
5.3.220.0070.07314.38
5.3.210.0070.07014.53
5.3.200.0130.06714.54
5.3.190.0100.07314.48
5.3.180.0070.07314.54
5.3.170.0100.04314.52
5.3.160.0000.04014.52
5.3.150.0070.03714.49
5.3.140.0070.03714.38
5.3.130.0100.06014.51
5.3.120.0030.07314.62
5.3.110.0030.08014.47
5.3.100.0070.05714.02
5.3.90.0130.06713.84
5.3.80.0030.03713.77
5.3.70.0070.07713.95
5.3.60.0030.04013.97
5.3.50.0100.03713.92
5.3.40.0000.05014.02
5.3.30.0030.04313.79
5.3.20.0100.07713.63
5.3.10.0070.06713.62
5.3.00.0070.07013.59
5.2.170.0000.05311.09
5.2.160.0100.04311.17
5.2.150.0030.06011.10
5.2.140.0000.05011.13
5.2.130.0030.06310.92
5.2.120.0070.05311.10
5.2.110.0030.06311.07
5.2.100.0100.05711.07
5.2.90.0100.04011.02
5.2.80.0100.05011.05
5.2.70.0070.03711.09
5.2.60.0030.06711.05
5.2.50.0070.06010.80
5.2.40.0000.05710.96
5.2.30.0030.06010.75
5.2.20.0070.06010.78
5.2.10.0070.03310.86
5.2.00.0000.03010.72
5.1.60.0030.02710.02
5.1.50.0030.0439.96
5.1.40.0100.0539.97
5.1.30.0170.04710.30
5.1.20.0030.05010.38
5.1.10.0070.06010.03
5.1.00.0100.05010.02
5.0.50.0030.0308.52
5.0.40.0070.0378.47
5.0.30.0070.0538.18
5.0.20.0100.0408.15
5.0.10.0070.0378.13
5.0.00.0070.0408.19
4.4.90.0030.0337.70
4.4.80.0070.0237.70
4.4.70.0030.0337.70
4.4.60.0000.0277.70
4.4.50.0030.0177.70
4.4.40.0000.0377.70
4.4.30.0030.0377.70
4.4.20.0000.0377.70
4.4.10.0100.0307.70
4.4.00.0030.0537.70
4.3.110.0000.0377.70
4.3.100.0000.0307.70
4.3.90.0000.0307.70
4.3.80.0000.0377.70
4.3.70.0030.0137.70
4.3.60.0030.0177.70
4.3.50.0030.0337.70
4.3.40.0000.0307.70
4.3.30.0000.0377.70
4.3.20.0030.0377.70
4.3.10.0030.0377.70
4.3.00.0030.0277.70

preferences:
60.46 ms | 401 KiB | 5 Q