3v4l.org

run code in 300+ PHP versions simultaneously
<?php $nullvar[0]['a']['r']= null; if (isset($nullvar[0]['a']['r'])) { echo "set"; } else { echo "not set"; } if (is_null($nullvar[0]['a']['r'])) { 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)
8.3.40.0030.01218.88
8.3.30.0100.00718.83
8.3.20.0030.00618.73
8.3.10.0000.00818.90
8.3.00.0080.00019.51
8.2.170.0080.00822.96
8.2.160.0080.00818.96
8.2.150.0000.00924.18
8.2.140.0050.00524.66
8.2.130.0000.00726.16
8.2.120.0080.00020.88
8.2.110.0030.00722.08
8.2.100.0040.00817.89
8.2.90.0040.00418.14
8.2.80.0000.00817.97
8.2.70.0000.00917.62
8.2.60.0040.00417.80
8.2.50.0040.00419.47
8.2.40.0040.00418.28
8.2.30.0060.00617.95
8.2.20.0040.00417.70
8.2.10.0000.00717.74
8.2.00.0070.00317.66
8.1.270.0040.00424.66
8.1.260.0080.00026.35
8.1.250.0070.00028.09
8.1.240.0030.00622.71
8.1.230.0110.00020.96
8.1.220.0050.00317.74
8.1.210.0090.00018.87
8.1.200.0030.00617.34
8.1.190.0040.00417.54
8.1.180.0000.00818.10
8.1.170.0080.00018.75
8.1.160.0000.00918.73
8.1.150.0000.00718.48
8.1.140.0000.00817.34
8.1.130.0030.00317.92
8.1.120.0000.00817.38
8.1.110.0080.00017.32
8.1.100.0040.00417.39
8.1.90.0040.00417.43
8.1.80.0000.00717.41
8.1.70.0000.00717.27
8.1.60.0080.00017.49
8.1.50.0080.00017.41
8.1.40.0040.00417.36
8.1.30.0040.00417.58
8.1.20.0070.00017.50
8.1.10.0040.00417.50
8.1.00.0040.00417.52
8.0.300.0000.00719.86
8.0.290.0000.00716.75
8.0.280.0000.00718.44
8.0.270.0000.00717.17
8.0.260.0030.00316.81
8.0.250.0040.00416.97
8.0.240.0000.00716.89
8.0.230.0030.00316.88
8.0.220.0000.00716.80
8.0.210.0070.00016.70
8.0.200.0050.00216.77
8.0.190.0000.00716.89
8.0.180.0040.00416.86
8.0.170.0060.00316.73
8.0.160.0030.00416.80
8.0.150.0030.00516.74
8.0.140.0030.00616.69
8.0.130.0060.00013.20
8.0.120.0040.00416.79
8.0.110.0040.00316.88
8.0.100.0070.00016.62
8.0.90.0070.00016.79
8.0.80.0060.00916.83
8.0.70.0000.00716.89
8.0.60.0000.00716.81
8.0.50.0000.00816.64
8.0.30.0140.00416.73
8.0.20.0120.00917.12
8.0.10.0040.00416.82
8.0.00.0140.00816.47
7.4.330.0000.00613.03
7.4.320.0070.00016.36
7.4.300.0040.00416.54
7.4.290.0070.00016.56
7.4.280.0000.00816.46
7.4.270.0040.00416.42
7.4.260.0030.00313.27
7.4.250.0040.00416.40
7.4.240.0000.00716.53
7.4.230.0070.00016.33
7.4.220.0130.01316.58
7.4.210.0060.01016.54
7.4.200.0030.00316.57
7.4.190.0000.00716.63
7.4.160.0070.01316.54
7.4.150.0030.01816.66
7.4.140.0090.00916.43
7.4.130.0080.01116.41
7.4.120.0050.01216.33
7.4.110.0120.01216.55
7.4.100.0100.00716.41
7.4.90.0090.01216.33
7.4.80.0070.01019.39
7.4.70.0070.01016.57
7.4.60.0070.01016.55
7.4.50.0060.00316.47
7.4.40.0080.00316.38
7.4.30.0060.01016.32
7.4.00.0060.00614.76
7.3.330.0030.00313.24
7.3.320.0020.00213.00
7.3.310.0020.00516.23
7.3.300.0070.00016.16
7.3.290.0030.01316.24
7.3.280.0110.00716.38
7.3.270.0090.00916.32
7.3.260.0140.00716.59
7.3.250.0080.01116.41
7.3.240.0030.01316.16
7.3.230.0070.01316.31
7.3.210.0100.00716.32
7.3.200.0060.01516.38
7.3.190.0060.01016.22
7.3.180.0120.00316.23
7.3.170.0060.01616.55
7.3.160.0080.01316.39
7.3.120.0060.00314.57
7.2.330.0000.01816.35
7.2.320.0130.01016.70
7.2.310.0080.00816.47
7.2.300.0080.00816.58
7.2.290.0090.00916.37
7.2.00.0080.00319.45
7.1.200.0040.01015.54
7.1.100.0190.00417.82
7.1.70.0000.00717.29
7.1.60.0100.01319.40
7.1.50.0090.01216.96
7.1.00.0070.05022.54
7.0.200.0100.00714.81
7.0.140.0070.07022.01
7.0.120.0100.06722.01
7.0.60.0100.08019.86
7.0.50.0030.07717.88
7.0.40.0100.04019.90
7.0.30.0200.06720.19
7.0.20.0400.07719.99
7.0.10.0100.07720.00
7.0.00.0070.05719.99
5.6.210.0130.08020.46
5.6.200.0070.03718.18
5.6.190.0030.04320.27
5.6.180.0330.07020.48
5.6.170.0200.07020.49
5.6.160.0170.08020.33
5.6.150.0070.08318.18
5.6.140.0130.05318.15
5.6.130.0000.04718.16
5.6.120.0000.04720.98
5.6.110.0070.09020.98
5.6.100.0130.05721.10
5.6.90.0070.04021.09
5.6.80.0270.07020.35
5.5.350.0370.07320.41
5.5.340.0000.09317.88
5.5.330.0030.04720.12
5.5.320.0000.06720.30
5.5.310.0400.06720.30
5.5.300.0030.04018.01
5.5.290.0100.03318.02
5.5.280.0070.07720.77
5.5.270.0030.05720.89
5.5.260.0030.08020.97
5.5.250.0130.07720.77
5.5.240.0270.07320.36
5.4.450.3200.04719.24
5.4.440.3030.04719.39
5.4.430.3800.03719.11
5.4.420.4670.04319.26
5.4.410.4230.04019.39
5.4.400.3970.03719.06
5.4.390.3670.04018.88
5.4.380.4530.04019.21
5.4.370.3700.02719.25
5.4.360.4370.04719.08
5.4.350.3930.04019.24
5.4.340.4070.04018.81
5.4.320.4000.03318.79
5.4.310.4230.03719.08
5.4.300.4800.03319.08
5.4.290.3930.04319.08
5.4.280.4030.03719.05
5.4.270.4170.04019.24
5.4.260.3500.03319.09
5.4.250.3700.03319.05
5.4.240.3600.04018.94
5.4.230.3830.03319.27
5.4.220.4030.04019.07
5.4.210.4100.03719.15
5.4.200.3900.03719.09
5.4.190.3970.04018.90
5.4.180.3830.03019.21
5.4.170.3730.03719.14
5.4.160.3770.03319.21
5.4.150.3870.04719.10
5.4.140.4030.03716.33
5.4.130.3970.04016.22
5.4.120.4400.03316.28
5.4.110.3900.03716.54
5.4.100.4570.03716.22
5.4.90.4470.04316.39
5.4.80.3670.03716.48
5.4.70.3800.03716.21
5.4.60.3730.03716.43
5.4.50.3830.02016.41
5.4.40.3730.03016.41
5.4.30.3870.04016.03
5.4.20.3800.03316.45
5.4.10.3770.03016.38
5.4.00.3600.03715.77
5.3.290.4100.03714.61
5.3.280.4700.04014.45
5.3.270.3200.03314.59
5.3.260.3900.04014.46
5.3.250.3470.03714.45
5.3.240.4430.03314.51
5.3.230.3730.03714.44
5.3.220.4170.03714.51
5.3.210.4400.03014.55
5.3.200.5000.03314.54
5.3.190.4600.04314.50
5.3.180.4670.04314.54
5.3.170.4100.04314.50
5.3.160.3670.04014.41
5.3.150.3670.04014.46
5.3.140.3570.03014.48
5.3.130.3770.03714.39
5.3.120.3770.03314.38
5.3.110.3570.04314.40
5.3.100.3800.04014.06
5.3.90.3630.03314.00
5.3.80.4000.03013.96
5.3.70.4100.02713.89
5.3.60.4030.03713.95
5.3.50.3270.04313.82
5.3.40.3870.03313.89
5.3.30.3900.03313.86
5.3.20.3530.03313.47
5.3.10.3700.03313.60
5.3.00.3970.02713.48
5.2.170.3270.03311.16
5.2.160.3130.02311.07
5.2.150.3370.03011.00
5.2.140.2900.02710.98
5.2.130.3500.03010.95
5.2.120.3430.02311.17
5.2.110.3230.03010.93
5.2.100.3070.02311.12
5.2.90.3030.03010.96
5.2.80.3670.03011.14
5.2.70.3470.03311.00
5.2.60.2700.02711.05
5.2.50.3270.02711.03
5.2.40.2800.02710.88
5.2.30.2630.02710.81
5.2.20.2730.02710.89
5.2.10.1800.03710.82
5.2.00.3230.03310.61
5.1.60.2670.02710.48
5.1.50.2530.02310.48
5.1.40.2800.02010.48
5.1.30.2870.02310.48
5.1.20.2470.02310.48
5.1.10.2830.03010.48
5.1.00.2530.03010.48
5.0.50.1470.02310.48
5.0.40.1270.01310.48
5.0.30.1670.03710.48
5.0.20.1730.02310.48
5.0.10.1770.01310.48
5.0.00.1770.03310.48
4.4.90.1470.01710.48
4.4.80.1300.01310.48
4.4.70.1530.01310.48
4.4.60.1570.01010.48
4.4.50.1500.02310.48
4.4.40.1570.02310.48
4.4.30.1570.01310.48
4.4.20.1470.02010.48
4.4.10.1530.01010.48
4.4.00.1470.03010.48
4.3.110.1300.01010.48
4.3.100.1770.01710.48
4.3.90.1800.02010.48
4.3.80.1670.02310.48
4.3.70.1600.02010.48
4.3.60.1500.01710.48
4.3.50.1400.01710.48
4.3.40.1370.02010.48
4.3.30.0630.01310.48
4.3.20.0830.02010.48
4.3.10.0700.01710.48
4.3.00.0830.02310.48

preferences:
43.77 ms | 400 KiB | 5 Q