3v4l.org

run code in 300+ PHP versions simultaneously
<?php $nullvar = array(0 => 'a', 'a' => array('b')); $nullvar[0]['a'] = null; if (isset($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)
8.3.60.0040.01516.63
8.3.50.0110.00917.61
8.3.40.0090.00618.88
8.3.30.0000.01818.89
8.3.20.0040.00418.86
8.3.10.0040.00420.83
8.3.00.0040.00417.63
8.2.180.0170.00318.29
8.2.170.0060.00922.96
8.2.160.0100.00322.13
8.2.150.0090.00024.18
8.2.140.0040.00424.66
8.2.130.0000.00826.16
8.2.120.0040.00419.64
8.2.110.0070.00320.94
8.2.100.0040.00817.84
8.2.90.0090.00019.40
8.2.80.0000.00817.90
8.2.70.0090.00017.75
8.2.60.0080.00017.93
8.2.50.0050.00318.07
8.2.40.0040.00418.00
8.2.30.0040.00418.00
8.2.20.0020.00517.89
8.2.10.0070.00017.68
8.2.00.0040.00417.87
8.1.280.0120.00625.92
8.1.270.0040.00423.99
8.1.260.0000.00726.35
8.1.250.0040.00428.09
8.1.240.0100.00720.79
8.1.230.0060.00620.95
8.1.220.0040.00417.74
8.1.210.0040.00418.91
8.1.200.0060.00317.35
8.1.190.0000.00817.66
8.1.180.0030.00618.10
8.1.170.0030.00618.93
8.1.160.0040.00418.83
8.1.150.0030.00518.51
8.1.140.0000.00717.39
8.1.130.0000.00717.77
8.1.120.0040.00417.41
8.1.110.0050.00417.36
8.1.100.0070.00017.48
8.1.90.0070.00017.45
8.1.80.0040.00417.38
8.1.70.0000.00717.41
8.1.60.0040.00417.47
8.1.50.0000.00817.51
8.1.40.0050.00317.55
8.1.30.0050.00317.54
8.1.20.0040.00417.59
8.1.10.0070.00017.52
8.1.00.0020.00517.37
8.0.300.0050.00219.90
8.0.290.0040.00416.63
8.0.280.0030.00318.38
8.0.270.0000.00717.11
8.0.260.0030.00318.63
8.0.250.0030.00516.92
8.0.240.0000.01017.03
8.0.230.0030.00317.05
8.0.220.0070.00016.92
8.0.210.0000.00716.86
8.0.200.0000.00717.06
8.0.190.0000.00717.02
8.0.180.0000.00816.95
8.0.170.0090.00016.99
8.0.160.0090.00017.00
8.0.150.0000.00816.96
8.0.140.0040.00416.95
8.0.130.0000.00513.36
8.0.120.0040.00716.95
8.0.110.0030.00316.91
8.0.100.0000.00716.82
8.0.90.0050.00317.02
8.0.80.0030.01016.95
8.0.70.0040.00416.95
8.0.60.0070.00016.96
8.0.50.0000.00716.85
8.0.30.0130.00917.28
8.0.20.0100.00717.21
8.0.10.0000.00817.14
8.0.00.0030.01716.75
7.4.330.0060.00014.68
7.4.320.0030.00316.50
7.4.300.0030.00316.51
7.4.290.0030.00316.60
7.4.280.0030.00616.61
7.4.270.0030.00316.53
7.4.260.0030.00313.29
7.4.250.0060.00316.54
7.4.240.0040.00416.53
7.4.230.0040.00416.65
7.4.220.0090.00916.59
7.4.210.0050.01016.62
7.4.200.0040.00416.48
7.4.190.0030.00316.69
7.4.160.0100.00516.43
7.4.150.0140.00317.07
7.4.140.0130.00617.24
7.4.130.0100.00816.47
7.4.120.0120.00616.51
7.4.110.0100.00716.43
7.4.100.0130.00316.68
7.4.90.0090.01316.44
7.4.80.0060.01318.80
7.4.70.0070.01116.57
7.4.60.0030.01516.38
7.4.50.0030.00616.43
7.4.40.0060.00922.27
7.4.30.0110.00716.46
7.4.00.0050.00814.75
7.3.330.0060.00013.27
7.3.320.0000.00613.19
7.3.310.0030.00316.46
7.3.300.0030.00316.42
7.3.290.0090.00516.34
7.3.280.0050.01316.41
7.3.270.0090.00917.07
7.3.260.0100.00718.24
7.3.250.0180.00816.45
7.3.240.0150.00016.43
7.3.230.0070.01316.42
7.3.210.0130.00316.34
7.3.200.0080.01419.39
7.3.190.0070.01016.59
7.3.180.0040.01116.18
7.3.170.0090.01016.36
7.3.160.0100.00816.27
7.3.120.0040.00714.84
7.3.10.0150.00016.54
7.3.00.0030.01016.75
7.2.330.0090.01516.40
7.2.320.0170.00016.59
7.2.310.0080.01516.73
7.2.300.0100.00716.81
7.2.290.0100.00716.80
7.2.130.0080.00416.96
7.2.120.0100.00016.82
7.2.110.0060.01016.98
7.2.100.0060.00916.83
7.2.90.0040.00716.70
7.2.80.0090.00416.72
7.2.70.0080.00416.97
7.2.60.0060.00616.95
7.2.50.0000.01317.01
7.2.40.0060.00317.01
7.2.30.0040.00717.01
7.2.20.0070.00716.68
7.2.10.0030.00917.01
7.2.00.0090.00418.31
7.1.250.0070.00315.80
7.1.200.0060.00315.46
7.1.100.0170.00017.77
7.1.70.0060.00317.21
7.1.60.0090.01519.40
7.1.50.0030.01916.96
7.1.00.0070.05722.46
7.0.200.0030.00616.93
7.0.140.0070.07021.99
7.0.60.0100.06719.93
7.0.50.0130.07317.77
7.0.40.0000.06717.69
7.0.30.0130.03317.76
7.0.20.0030.05717.73
7.0.10.0130.07017.79
7.0.00.0130.04317.69
5.6.210.0100.08320.51
5.6.200.0130.08018.18
5.6.190.0100.07718.18
5.6.180.0130.07318.15
5.6.170.0030.09018.07
5.6.160.0030.05018.22
5.6.150.0070.04018.22
5.6.140.0070.07718.11
5.6.130.0100.06718.21
5.6.120.0030.06318.11
5.6.110.0000.04718.17
5.6.100.0070.07718.08
5.6.90.0130.07318.20
5.6.80.0070.07717.59
5.6.70.0130.06317.55
5.6.60.0070.04017.53
5.6.50.0070.03317.56
5.6.40.0000.04017.57
5.6.30.0070.03717.43
5.6.20.0030.03717.57
5.6.10.0030.03717.57
5.6.00.0030.04017.44
5.5.350.0200.08020.30
5.5.340.0170.07318.02
5.5.330.0130.06717.95
5.5.320.0000.08318.02
5.5.310.0130.07317.94
5.5.300.0130.07717.94
5.5.290.0130.07718.00
5.5.280.0100.07717.88
5.5.270.0170.09017.95
5.5.260.0030.05017.86
5.5.250.0070.07017.72
5.5.240.0100.07717.31
5.5.230.0030.04317.37
5.5.220.0000.04017.36
5.5.210.0030.04017.32
5.5.200.0000.04017.27
5.5.190.0070.03317.37
5.5.180.0030.03717.31
5.5.160.0000.04017.35
5.5.150.0070.03317.31
5.5.140.0000.04017.22
5.5.130.0030.04017.26
5.5.120.0070.03317.29
5.5.110.0030.04017.36
5.5.100.0030.03717.23
5.5.90.0030.03317.26
5.5.80.0000.04017.18
5.5.70.0000.04017.22
5.5.60.0030.03717.20
5.5.50.0070.03717.20
5.5.40.0000.04017.15
5.5.30.0000.04017.25
5.5.20.0070.03317.18
5.5.10.0030.03717.25
5.5.00.0100.03017.22
5.4.450.0070.04319.42
5.4.440.0070.08019.36
5.4.430.0030.06319.39
5.4.420.0030.07719.52
5.4.410.0100.04319.29
5.4.400.0100.04718.82
5.4.390.0030.05018.90
5.4.380.0170.06019.03
5.4.370.0030.03719.20
5.4.360.0070.03719.25
5.4.350.0000.04018.98
5.4.340.0100.03318.98
5.4.320.0030.03719.20
5.4.310.0000.04018.98
5.4.300.0100.03018.92
5.4.290.0030.03718.98
5.4.280.0030.03719.06
5.4.270.0000.04018.82
5.4.260.0000.04019.13
5.4.250.0000.04019.02
5.4.240.0000.04019.11
5.4.230.0000.04019.08
5.4.220.0030.04318.95
5.4.210.0070.03319.08
5.4.200.0070.03319.09
5.4.190.0030.03319.02
5.4.180.0030.03719.08
5.4.170.0000.04019.11
5.4.160.0000.03718.87
5.4.150.0070.03318.82
5.4.140.0030.03316.32
5.4.130.0000.03716.29
5.4.120.0000.03716.25
5.4.110.0100.06716.35
5.4.100.0070.03316.23
5.4.90.0000.03716.43
5.4.80.0000.04016.26
5.4.70.0030.07016.41
5.4.60.0030.06316.25
5.4.50.0000.07716.32
5.4.40.0000.07016.25
5.4.30.0130.06316.39
5.4.20.0070.07316.32
5.4.10.0030.07316.20
5.4.00.0130.06315.76
5.3.290.0030.03714.58
5.3.280.0030.03714.43
5.3.270.0000.04014.43
5.3.260.0030.03714.54
5.3.250.0100.03014.52
5.3.240.0030.03314.55
5.3.230.0100.03014.43
5.3.220.0000.07714.54
5.3.210.0070.04314.34
5.3.200.0000.04714.52
5.3.190.0070.03714.52
5.3.180.0030.03714.43
5.3.170.0130.03714.38
5.3.160.0030.05314.54
5.3.150.0000.06014.52
5.3.140.0100.05714.46
5.3.130.0070.07714.48
5.3.120.0000.06314.63
5.3.110.0070.07314.38
5.3.100.0070.06014.00
5.3.90.0100.07313.83
5.3.80.0070.07713.98
5.3.70.0130.05313.95
5.3.60.0100.05013.77
5.3.50.0000.04713.93
5.3.40.0100.07713.72
5.3.30.0000.08013.69
5.3.20.0070.06313.64
5.3.10.0100.07013.59
5.3.00.0100.04013.55
5.2.170.0030.06311.14
5.2.160.0100.04011.11
5.2.150.0030.05311.12
5.2.140.0100.06011.11
5.2.130.0100.04310.88
5.2.120.0000.07011.24
5.2.110.0000.06711.13
5.2.100.0030.04310.88
5.2.90.0030.03711.07
5.2.80.0030.03011.00
5.2.70.0000.03310.92
5.2.60.0200.02311.00
5.2.50.0100.05710.98
5.2.40.0070.05710.74
5.2.30.0030.06710.98
5.2.20.0070.04310.88
5.2.10.0070.05310.89
5.2.00.0000.03310.77
5.1.60.0100.0279.97
5.1.50.0030.02310.05
5.1.40.0030.0539.90
5.1.30.0070.05010.36
5.1.20.0030.06010.36
5.1.10.0030.03010.04
5.1.00.0000.05310.14
5.0.50.0030.0278.62
5.0.40.0070.0338.31
5.0.30.0000.0678.14
5.0.20.0000.0238.23
5.0.10.0000.0208.23
5.0.00.0000.0438.22
4.4.90.0000.0237.75
4.4.80.0030.0337.75
4.4.70.0030.0177.75
4.4.60.0030.0337.75
4.4.50.0000.0277.75
4.4.40.0070.0307.75
4.4.30.0100.0177.75
4.4.20.0030.0377.75
4.4.10.0030.0337.75
4.4.00.0030.0537.75
4.3.110.0030.0377.75
4.3.100.0030.0237.75
4.3.90.0000.0207.75
4.3.80.0000.0537.75
4.3.70.0030.0237.75
4.3.60.0030.0337.75
4.3.50.0000.0407.75
4.3.40.0030.0437.75
4.3.30.0000.0307.75
4.3.20.0000.0407.75
4.3.10.0030.0207.75
4.3.00.0000.0237.75

preferences:
41.86 ms | 401 KiB | 5 Q