3v4l.org

run code in 300+ PHP versions simultaneously
<?php $nullvar = array( 0 => array('a' => 1), 1 => array('b' => 1) ); $nullvar[0]['a'] = null; if (isset($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)
8.3.60.0120.00616.75
8.3.50.0120.00517.25
8.3.40.0150.00718.73
8.3.30.0150.00318.60
8.3.20.0030.00518.82
8.3.10.0060.00320.49
8.3.00.0040.00417.34
8.2.180.0080.01216.75
8.2.170.0150.00622.96
8.2.160.0040.01122.13
8.2.150.0040.00424.18
8.2.140.0030.00624.66
8.2.130.0070.00026.16
8.2.120.0000.00719.96
8.2.110.0070.00319.14
8.2.100.0100.00317.84
8.2.90.0000.00819.22
8.2.80.0040.00417.97
8.2.70.0000.00817.63
8.2.60.0040.00417.91
8.2.50.0030.00618.07
8.2.40.0070.00018.16
8.2.30.0000.00717.94
8.2.20.0080.00017.77
8.2.10.0040.00417.60
8.2.00.0050.00317.66
8.1.280.0140.00725.92
8.1.270.0080.00024.66
8.1.260.0040.00426.35
8.1.250.0000.00728.09
8.1.240.0060.00622.44
8.1.230.0080.00420.97
8.1.220.0000.00718.77
8.1.210.0000.00818.85
8.1.200.0030.00617.35
8.1.190.0060.00317.39
8.1.180.0040.00418.10
8.1.170.0050.00218.35
8.1.160.0040.00418.85
8.1.150.0000.00718.56
8.1.140.0000.00817.30
8.1.130.0030.00317.84
8.1.120.0000.00817.43
8.1.110.0030.00617.43
8.1.100.0000.00717.39
8.1.90.0070.00017.41
8.1.80.0040.00417.29
8.1.70.0080.00017.32
8.1.60.0040.00417.48
8.1.50.0040.00417.39
8.1.40.0000.00717.41
8.1.30.0040.00417.45
8.1.20.0030.00617.53
8.1.10.0050.00217.58
8.1.00.0000.00817.50
8.0.300.0000.00719.85
8.0.290.0050.00317.15
8.0.280.0000.00718.35
8.0.270.0030.00317.17
8.0.260.0070.00018.52
8.0.250.0000.00716.76
8.0.240.0050.00516.88
8.0.230.0030.00316.77
8.0.220.0050.00316.82
8.0.210.0070.00016.70
8.0.200.0000.00716.75
8.0.190.0030.00416.91
8.0.180.0000.00716.82
8.0.170.0030.00716.76
8.0.160.0000.00716.95
8.0.150.0050.00216.78
8.0.140.0000.00816.83
8.0.130.0050.00013.21
8.0.120.0030.00616.74
8.0.110.0000.00716.88
8.0.100.0040.00416.82
8.0.90.0040.00416.63
8.0.80.0060.01016.82
8.0.70.0080.00016.73
8.0.60.0000.00716.74
8.0.50.0050.00216.69
8.0.30.0080.01017.12
8.0.20.0090.00917.21
8.0.10.0030.00316.77
8.0.00.0100.01016.90
7.4.330.0050.00014.59
7.4.320.0060.00016.46
7.4.300.0000.00616.45
7.4.290.0030.00316.53
7.4.280.0030.00616.52
7.4.270.0040.00416.45
7.4.260.0000.00613.23
7.4.250.0030.00616.52
7.4.240.0000.00716.59
7.4.230.0030.00316.54
7.4.220.0160.01016.59
7.4.210.0030.01216.47
7.4.200.0040.00416.61
7.4.190.0000.00716.51
7.4.160.0140.00316.20
7.4.150.0060.01217.07
7.4.140.0070.01017.20
7.4.130.0100.00716.53
7.4.120.0080.00816.59
7.4.110.0120.00916.25
7.4.100.0070.01016.61
7.4.90.0070.01016.39
7.4.80.0110.00618.80
7.4.70.0090.00916.32
7.4.60.0070.01016.57
7.4.50.0000.00816.50
7.4.40.0070.00722.27
7.4.30.0040.01216.29
7.4.00.0030.01315.04
7.3.330.0000.00613.11
7.3.320.0030.00313.14
7.3.310.0030.00316.33
7.3.300.0000.00716.25
7.3.290.0100.00316.27
7.3.280.0070.00916.36
7.3.270.0160.00317.07
7.3.260.0120.00618.24
7.3.250.0100.00716.48
7.3.240.0100.00716.52
7.3.230.0030.01316.49
7.3.210.0100.00716.27
7.3.200.0140.00619.39
7.3.190.0130.00916.54
7.3.180.0060.01216.22
7.3.170.0090.01216.52
7.3.160.0100.00616.22
7.3.120.0090.00314.73
7.3.10.0080.01016.59
7.3.00.0070.01116.51
7.2.330.0150.00316.45
7.2.320.0130.01016.78
7.2.310.0090.00916.52
7.2.300.0070.01616.67
7.2.290.0030.01416.54
7.2.130.0080.01016.63
7.2.120.0100.00916.86
7.2.110.0100.00916.77
7.2.100.0080.00716.73
7.2.90.0080.00916.63
7.2.80.0110.00616.73
7.2.70.0080.00816.71
7.2.60.0080.01116.76
7.2.50.0120.00616.82
7.2.40.0110.00416.94
7.2.30.0050.00616.86
7.2.20.0080.00816.86
7.2.10.0040.01016.87
7.2.00.0040.01017.36
7.1.250.0110.00815.68
7.1.240.0050.01115.75
7.1.230.0040.01015.83
7.1.220.0100.00515.74
7.1.210.0110.00515.72
7.1.200.0080.00615.56
7.1.190.0050.01115.62
7.1.180.0070.00815.63
7.1.170.0070.01015.74
7.1.160.0050.00515.57
7.1.150.0040.00815.79
7.1.140.0030.00915.69
7.1.130.0080.00515.67
7.1.120.0020.00915.70
7.1.110.0050.00815.77
7.1.100.0060.00716.21
7.1.90.0040.00615.74
7.1.80.0060.00815.72
7.1.70.0050.00616.13
7.1.60.0070.00916.50
7.1.50.0080.00615.97
7.1.40.0060.00715.93
7.1.30.0040.00815.72
7.1.20.0060.00815.86
7.1.10.0060.00515.72
7.1.00.0050.02317.49
7.0.330.0060.01215.29
7.0.320.0060.00815.17
7.0.310.0050.01015.47
7.0.300.0080.00515.45
7.0.290.0030.01115.32
7.0.280.0050.00815.38
7.0.270.0050.00615.37
7.0.260.0060.00915.35
7.0.250.0090.00415.18
7.0.240.0070.00615.45
7.0.230.0080.00615.34
7.0.220.0080.00715.40
7.0.210.0060.00815.49
7.0.200.0060.00515.71
7.0.190.0070.00315.41
7.0.180.0060.00615.35
7.0.170.0040.00815.31
7.0.160.0050.00615.30
7.0.150.0080.00515.33
7.0.140.0030.02517.06
7.0.130.0050.00715.37
7.0.120.0040.00715.17
7.0.110.0070.00415.36
7.0.100.0000.01315.53
7.0.90.0080.00615.16
7.0.80.0050.00715.19
7.0.70.0050.00615.38
7.0.60.0070.02316.52
7.0.50.0060.02416.00
7.0.40.0070.01514.50
7.0.30.0070.02414.54
7.0.20.0060.02614.56
7.0.10.0080.02214.42
7.0.00.0070.01614.54
5.6.380.0020.01014.56
5.6.370.0090.00714.54
5.6.360.0100.00214.40
5.6.350.0080.00714.37
5.6.340.0080.00614.35
5.6.330.0070.00714.17
5.6.320.0080.00314.54
5.6.310.0070.00814.20
5.6.300.0040.00814.62
5.6.290.0070.00414.56
5.6.280.0030.02515.95
5.6.270.0050.00814.41
5.6.260.0070.00514.37
5.6.250.0080.00714.27
5.6.240.0090.00514.27
5.6.230.0050.00814.42
5.6.220.0080.00514.21
5.6.210.0050.02415.82
5.6.200.0060.02215.43
5.6.190.0060.02515.36
5.6.180.0090.01815.39
5.6.170.0050.03015.35
5.6.160.0060.01615.45
5.6.150.0040.01615.34
5.6.140.0050.02515.29
5.6.130.0060.02515.29
5.6.120.0070.02515.27
5.6.110.0060.02515.29
5.6.100.0080.01315.39
5.6.90.0040.01915.37
5.6.80.0060.02415.22
5.6.70.0060.02115.11
5.6.60.0060.02014.99
5.6.50.0040.01915.04
5.6.40.0070.01215.04
5.6.30.0080.01215.08
5.6.20.0060.02015.01
5.6.10.0080.02315.04
5.6.00.0050.01615.21
5.5.380.0060.00611.26
5.5.370.0060.00511.22
5.5.360.0060.00311.10
5.5.350.0120.02113.49
5.5.340.0030.01812.91
5.5.330.0060.02512.92
5.5.320.0060.01512.79
5.5.310.0020.02712.84
5.5.300.0050.01812.92
5.5.290.0050.01512.91
5.5.280.0080.02212.93
5.5.270.0060.02512.89
5.5.260.0060.01812.81
5.5.250.0070.02012.71
5.5.240.0060.02112.55
5.5.230.0070.02412.62
5.5.220.0050.02312.65
5.5.210.0060.01512.64
5.5.200.0050.01212.61
5.5.190.0100.01412.63
5.5.180.0050.02412.68
5.5.170.0080.00511.93
5.5.160.0050.01512.64
5.5.150.0080.02312.65
5.5.140.0060.01812.61
5.5.130.0060.01812.63
5.5.120.0050.01512.68
5.5.110.0040.01512.64
5.5.100.0040.01812.55
5.5.90.0050.02512.64
5.5.80.0070.01412.62
5.5.70.0090.01912.63
5.5.60.0060.02112.62
5.5.50.0060.01312.56
5.5.40.0060.01912.73
5.5.30.0080.01612.60
5.5.20.0050.02412.60
5.5.10.0090.01812.66
5.5.00.0100.02112.54
5.4.450.0040.02613.21
5.4.440.0030.01813.13
5.4.430.0060.02213.10
5.4.420.0050.01313.19
5.4.410.0040.01513.04
5.4.400.0070.02212.95
5.4.390.0060.02312.93
5.4.380.0050.02013.07
5.4.370.0040.02512.91
5.4.360.0070.01313.10
5.4.350.0030.01612.95
5.4.340.0080.02113.05
5.4.330.0040.00610.99
5.4.320.0080.01112.95
5.4.310.0070.01313.08
5.4.300.0060.01613.01
5.4.290.0040.01613.02
5.4.280.0040.02612.95
5.4.270.0030.01713.04
5.4.260.0060.01413.00
5.4.250.0080.01313.01
5.4.240.0070.01313.07
5.4.230.0090.02113.02
5.4.220.0060.02413.02
5.4.210.0060.01412.92
5.4.200.0060.02412.95
5.4.190.0060.01612.97
5.4.180.0080.01712.96
5.4.170.0030.01712.96
5.4.160.0060.01813.01
5.4.150.0100.01312.95
5.4.140.0110.01612.36
5.4.130.0080.01712.41
5.4.120.0070.02112.32
5.4.110.0050.01212.24
5.4.100.0040.01312.31
5.4.90.0040.01412.38
5.4.80.0070.01012.40
5.4.70.0070.01012.25
5.4.60.0060.01312.41
5.4.50.0060.01212.40
5.4.40.0050.01112.32
5.4.30.0060.01012.26
5.4.20.0060.01212.26
5.4.10.0050.01212.30
5.4.00.0050.01312.19
5.3.290.0050.01411.80
5.3.280.0060.02111.75
5.3.270.0030.01811.69
5.3.260.0060.02511.76
5.3.250.0050.02411.80
5.3.240.0070.01711.74
5.3.230.0060.01311.79
5.3.220.0050.01811.68
5.3.210.0060.02311.66
5.3.200.0040.01511.67
5.3.190.0080.01311.68
5.3.180.0050.01111.70
5.3.170.0050.01311.72
5.3.160.0040.01211.74
5.3.150.0040.01411.74
5.3.140.0050.01011.74
5.3.130.0060.01211.75
5.3.120.0030.01311.68
5.3.110.0060.01211.70
5.3.100.0030.01511.55
5.3.90.0080.01311.61
5.3.80.0050.01411.60
5.3.70.0050.01311.54
5.3.60.0050.01311.59
5.3.50.0070.01511.52
5.3.40.0020.02211.48
5.3.30.0070.01111.58
5.3.20.0060.01211.50
5.3.10.0070.01011.38
5.3.00.0070.01111.44
5.2.170.0060.01010.69
5.2.160.0030.01910.64
5.2.150.0060.00910.68
5.2.140.0040.00910.64
5.2.130.0020.01210.62
5.2.120.0030.01210.65
5.2.110.0040.01110.62
5.2.100.0070.00810.67
5.2.90.0060.00810.56
5.2.80.0030.01310.54
5.2.70.0040.01010.55
5.2.60.0050.00810.58
5.2.50.0020.01410.58
5.2.40.0040.00910.51
5.2.30.0030.00910.57
5.2.20.0040.01010.60
5.2.10.0020.01110.51
5.2.00.0040.01110.50
5.1.60.0060.00610.08
5.1.50.0050.00810.09
5.1.40.0020.01110.14
5.1.30.0020.01110.21
5.1.20.0040.00910.16
5.1.10.0050.00810.18
5.1.00.0040.00710.14
5.0.50.0030.0069.67
5.0.40.0040.0079.67
5.0.30.0060.0079.67
5.0.20.0040.0069.67
5.0.10.0010.0109.67
5.0.00.0030.0099.67
4.4.90.0020.0079.67
4.4.80.0030.0069.67
4.4.70.0020.0069.67
4.4.60.0010.0089.67
4.4.50.0030.0059.67
4.4.40.0020.0089.67
4.4.30.0030.0059.67
4.4.20.0020.0079.67
4.4.10.0040.0049.67
4.4.00.0020.0109.67
4.3.110.0010.0089.67
4.3.100.0030.0059.67
4.3.90.0010.0079.67
4.3.80.0020.0099.67
4.3.70.0030.0069.67
4.3.60.0010.0089.67
4.3.50.0000.0089.67
4.3.40.0020.0119.67
4.3.30.0030.0119.67
4.3.20.0010.0089.67
4.3.10.0020.0079.67
4.3.00.0020.0069.67

preferences:
54.5 ms | 400 KiB | 5 Q