3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = NULL; echo "print_r of x:\n"; print_r($x); echo "\n\nis_null of x:\n"; print_r(is_null($x)); echo "\n\nisset of x:\n"; print_r(isset($x));

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)
8.3.60.0110.00718.43
8.3.50.0040.01818.21
8.3.40.0130.00618.59
8.3.30.0100.00718.51
8.3.20.0080.00019.05
8.3.10.0040.00421.77
8.3.00.0040.00420.52
8.2.180.0110.00416.50
8.2.170.0070.00722.96
8.2.160.0000.01422.08
8.2.150.0030.00624.18
8.2.140.0040.00424.66
8.2.130.0070.00718.03
8.2.120.0040.00426.35
8.2.110.0070.00319.15
8.2.100.0080.00417.91
8.2.90.0000.00817.75
8.2.80.0050.00317.97
8.2.70.0000.00817.80
8.2.60.0060.00318.09
8.2.50.0040.00418.10
8.2.40.0040.00419.44
8.2.30.0040.00419.06
8.2.20.0070.00017.98
8.2.10.0080.00017.87
8.2.00.0040.00417.63
8.1.280.0060.00925.92
8.1.270.0050.00218.88
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0060.00322.18
8.1.230.0090.00322.13
8.1.220.0060.00317.74
8.1.210.0000.00818.77
8.1.200.0070.00317.13
8.1.190.0050.00317.10
8.1.180.0040.00418.10
8.1.170.0040.00418.50
8.1.160.0040.00418.73
8.1.150.0080.00018.72
8.1.140.0000.00722.00
8.1.130.0030.00320.20
8.1.120.0040.00417.43
8.1.110.0040.00417.26
8.1.100.0040.00417.44
8.1.90.0000.00817.27
8.1.80.0070.00017.39
8.1.70.0090.00017.40
8.1.60.0060.00317.40
8.1.50.0000.00717.32
8.1.40.0040.00417.52
8.1.30.0000.00717.50
8.1.20.0000.00817.50
8.1.10.0040.00417.48
8.1.00.0000.00717.40
8.0.300.0030.00618.77
8.0.290.0040.00416.63
8.0.280.0040.00418.46
8.0.270.0000.00717.28
8.0.260.0030.00318.42
8.0.250.0000.00716.78
8.0.240.0040.00416.85
8.0.230.0070.00016.89
8.0.220.0030.00316.83
8.0.210.0030.00316.82
8.0.200.0070.00016.93
8.0.190.0040.00416.74
8.0.180.0080.00016.88
8.0.170.0000.00816.72
8.0.160.0040.00416.85
8.0.150.0030.00416.69
8.0.140.0040.00416.79
8.0.130.0000.00513.21
8.0.120.0070.00016.67
8.0.110.0040.00416.86
8.0.100.0000.00716.81
8.0.90.0040.00416.76
8.0.80.0110.00416.78
8.0.70.0070.00016.77
8.0.60.0000.00716.68
8.0.50.0030.00516.75
8.0.30.0130.00417.08
8.0.20.0160.00317.40
8.0.10.0000.00716.97
8.0.00.0060.01216.66
7.4.330.0050.00015.55
7.4.320.0070.00016.59
7.4.300.0030.00316.43
7.4.290.0030.00316.42
7.4.280.0040.00416.51
7.4.270.0080.00016.38
7.4.260.0030.00316.48
7.4.250.0000.00716.41
7.4.240.0040.00416.52
7.4.230.0030.00316.51
7.4.220.0000.00816.46
7.4.210.0080.00816.57
7.4.200.0030.00516.36
7.4.160.0110.00716.49
7.4.140.0110.00917.86
7.4.130.0100.00716.32
7.4.120.0090.00916.50
7.4.110.0100.01416.40
7.4.100.0070.01016.35
7.4.90.0040.01416.35
7.4.80.0080.01319.39
7.4.70.0100.00616.52
7.4.60.0100.00616.53
7.4.50.0030.01216.22
7.4.40.0090.01016.42
7.3.330.0060.00012.96
7.3.320.0050.00012.96
7.3.310.0030.00716.08
7.3.300.0000.00616.14
7.3.290.0030.00316.07
7.3.280.0080.00516.15
7.3.260.0120.00616.29
7.3.240.0060.01316.13
7.3.230.0090.00616.35
7.3.210.0100.00616.37
7.3.200.0090.00816.47
7.3.190.0060.01516.25
7.3.180.0140.00316.16
7.3.170.0120.00616.23
7.3.160.0090.00616.43
7.2.330.0090.00816.64
7.2.320.0180.00316.51
7.2.310.0090.00916.32
7.2.300.0100.00616.49
7.2.290.0090.00916.67

preferences:
44.39 ms | 400 KiB | 5 Q