3v4l.org

run code in 300+ PHP versions simultaneously
<?php //test 1 is defined, but has a value of null. isset will return false, use causes no error. $test1 = null; var_dump($test1); var_dump(isset($test1)); echo "\n----------\n\n"; //test2 is defined with a string value. isset will return true $test2 = "test"; var_dump($test2); var_dump(isset($test2)); echo "\n----------\n\n"; //test3 is not defined, isset returns false and use causes error. var_dump($test3); var_dump(isset($test3));

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)
8.4.130.0090.01118.83
8.4.120.0060.01024.20
8.4.110.0100.00922.59
8.4.100.0030.00717.94
8.4.90.0120.00917.68
8.4.80.0110.00817.76
8.4.70.0100.01017.90
8.4.60.0040.00617.69
8.4.50.0110.00920.48
8.4.40.0170.00317.74
8.4.30.0130.00719.46
8.4.20.0080.01120.52
8.4.10.0040.00417.74
8.3.260.0150.00616.94
8.3.250.0090.00918.77
8.3.240.0130.00617.05
8.3.230.0080.00816.39
8.3.220.0100.00816.93
8.3.210.0100.00916.64
8.3.200.0140.00516.23
8.3.190.0100.00516.61
8.3.180.0090.00516.53
8.3.170.0110.00720.70
8.3.160.0100.01016.87
8.3.150.0190.00016.54
8.3.140.0110.00416.91
8.3.130.0040.01118.64
8.3.120.0040.01118.64
8.3.110.0150.00420.94
8.3.100.0190.00024.06
8.3.90.0000.00826.77
8.3.80.0000.00919.36
8.3.70.0000.01816.50
8.3.60.0110.00716.61
8.3.50.0080.00817.16
8.3.40.0110.00418.54
8.3.30.0100.00318.59
8.3.20.0080.00018.49
8.3.10.0040.00419.21
8.3.00.0030.00523.70
8.2.290.0090.00622.04
8.2.280.0110.00718.41
8.2.270.0130.00618.70
8.2.260.0040.00417.16
8.2.250.0030.00718.27
8.2.240.0070.00719.09
8.2.230.0030.00622.58
8.2.220.0030.00637.54
8.2.210.0030.00526.77
8.2.200.0060.00618.88
8.2.190.0140.00316.75
8.2.180.0060.01618.42
8.2.170.0120.00319.08
8.2.160.0070.01022.96
8.2.150.0000.00724.18
8.2.140.0000.00824.66
8.2.130.0080.00019.64
8.2.120.0040.00426.35
8.2.110.0100.00022.25
8.2.100.0090.00317.91
8.2.90.0080.00017.84
8.2.80.0030.00519.16
8.2.70.0030.00517.78
8.2.60.0040.00418.22
8.2.50.0050.00318.10
8.2.40.0070.00019.38
8.2.30.0000.00719.47
8.2.20.0000.00718.04
8.2.10.0040.00418.03
8.2.00.0000.00719.48
8.1.330.0110.00816.52
8.1.320.0090.00916.29
8.1.310.0060.01216.51
8.1.300.0140.00416.28
8.1.290.0060.00330.84
8.1.280.0110.00425.92
8.1.270.0040.00420.21
8.1.260.0060.00326.35
8.1.250.0080.00028.09
8.1.240.0090.00023.96
8.1.230.0030.00722.77
8.1.220.0080.00017.74
8.1.210.0050.00318.77
8.1.200.0060.00317.23
8.1.190.0000.00817.23
8.1.180.0080.00018.10
8.1.170.0030.00618.57
8.1.160.0040.00418.78
8.1.150.0000.00818.77
8.1.140.0000.00817.56
8.1.130.0030.00319.07
8.1.120.0070.00017.46
8.1.110.0040.00817.42
8.1.100.0070.00017.40
8.1.90.0050.00317.30
8.1.80.0000.00717.45
8.1.70.0040.00417.41
8.1.60.0000.01117.39
8.1.50.0030.00717.43
8.1.40.0030.00617.43
8.1.30.0030.00517.45
8.1.20.0070.00017.54
8.1.10.0000.00817.39
8.1.00.0050.00317.36
8.0.300.0080.00022.01
8.0.290.0060.00316.75
8.0.280.0030.00318.44
8.0.270.0050.00217.30
8.0.260.0000.00717.27
8.0.250.0070.00016.94
8.0.240.0030.00316.96
8.0.230.0050.00316.86
8.0.220.0000.00716.89
8.0.210.0040.00416.88
8.0.200.0080.00216.90
8.0.190.0040.00416.84
8.0.180.0040.00316.92
8.0.170.0000.01016.89
8.0.160.0000.00716.90
8.0.150.0040.00416.84
8.0.140.0050.00216.82
8.0.130.0070.00013.40
8.0.120.0050.00316.88
8.0.110.0050.00216.86
8.0.100.0070.00016.79
8.0.90.0040.00416.68
8.0.80.0060.00916.90
8.0.70.0040.00416.93
8.0.60.0000.00716.91
8.0.50.0040.00416.88
8.0.30.0090.00817.07
8.0.20.0080.01117.40
8.0.10.0000.00816.97
8.0.00.0030.01416.62
7.4.330.0000.00515.55
7.4.320.0000.00616.29
7.4.300.0000.00616.30
7.4.290.0020.00716.42
7.4.280.0040.00416.57
7.4.270.0030.00316.42
7.4.260.0030.00316.32
7.4.250.0050.00216.35
7.4.240.0040.00416.44
7.4.230.0050.00216.53
7.4.220.0040.00416.43
7.4.210.0080.01016.50
7.4.200.0020.00516.36
7.4.160.0060.00916.43
7.4.140.0110.01017.86
7.4.130.0030.01416.41
7.4.120.0120.00916.48
7.4.110.0150.00016.30
7.4.100.0090.00916.43
7.4.90.0140.00716.25
7.4.80.0100.01319.39
7.4.70.0110.00816.71
7.4.60.0060.01216.36
7.4.50.0080.00616.48
7.4.40.0080.00816.39
7.4.00.0060.01114.88
7.3.330.0050.00013.18
7.3.320.0060.00012.95
7.3.310.0000.00616.26
7.3.300.0030.00316.30
7.3.290.0040.00416.09
7.3.280.0120.00416.24
7.3.260.0090.01216.33
7.3.240.0060.01116.32
7.3.230.0150.00316.29
7.3.210.0140.00316.36
7.3.200.0090.00916.45
7.3.190.0120.00616.20
7.3.180.0130.00316.50
7.3.170.0070.01016.52
7.3.160.0040.01216.29
7.3.10.0070.00716.25
7.3.00.0130.00316.43
7.2.330.0100.01016.58
7.2.320.0140.00316.65
7.2.310.0100.01016.54
7.2.300.0060.01616.20
7.2.290.0000.01816.46
7.2.130.0090.00316.16
7.2.120.0080.00816.43
7.2.110.0160.00316.63
7.2.100.0090.00616.43
7.2.90.0140.00816.59
7.2.80.0100.00316.34
7.2.70.0060.00616.52
7.2.60.3920.00715.71
7.2.50.3450.00615.38
7.2.40.3320.00615.84
7.2.30.3090.00215.88
7.2.20.2740.01115.59
7.2.10.3250.00615.83
7.2.00.3440.00616.04
7.1.250.0070.01115.38
7.1.200.0060.00615.65
7.1.170.6160.00413.91
7.1.160.6670.00716.71
7.1.150.6100.01016.75
7.1.140.5800.01116.79
7.1.130.6070.00816.25
7.1.120.7080.01016.61
7.1.110.6720.01015.77
7.1.100.6980.00915.52
7.1.90.7960.00815.99
7.1.80.7930.01115.66
7.1.70.8060.00815.30
7.1.61.0430.01233.14
7.1.51.7390.01632.93
7.1.41.0760.01532.38
7.1.31.0180.01832.56
7.1.20.9250.01932.84
7.1.10.6810.01414.63
7.1.00.0280.01114.69

preferences:
125.58 ms | 403 KiB | 5 Q