3v4l.org

run code in 300+ PHP versions simultaneously
<?php $test = ['a' => 1, 'b' => null]; echo "array_key_exists:\n"; echo array_key_exists('a', $test) ? "a: found\n" : "a: not found\n"; echo array_key_exists('b', $test) ? "b: found\n" : "b: not found\n"; echo "\n\nisset:\n"; echo isset($test['a']) ? "a: found\n" : "a: not found\n"; echo isset($test['b']) ? "b: found\n" : "b: not found\n"; echo "\n\nempty:\n"; echo empty($test['a']) ? "a: found\n" : "a: not found\n"; echo empty($test['b']) ? "b: found\n" : "b: not found\n";

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)
8.4.130.0100.01017.25
8.4.120.0040.00420.73
8.4.110.0050.00522.23
8.4.100.0110.01017.98
8.4.90.0060.00317.80
8.4.80.0100.01017.70
8.4.70.0120.00719.67
8.4.60.0080.00319.00
8.4.50.0100.01020.35
8.4.40.0170.00319.31
8.4.30.0070.01317.78
8.4.20.0100.01017.71
8.4.10.0030.00617.81
8.3.250.0110.00818.71
8.3.240.0120.00716.50
8.3.230.0120.00716.81
8.3.220.0080.01016.82
8.3.210.0130.00116.62
8.3.200.0040.00416.71
8.3.190.0050.00417.15
8.3.180.0100.01018.32
8.3.170.0060.01217.06
8.3.160.0140.00418.82
8.3.150.0120.00616.92
8.3.140.0070.00416.57
8.3.130.0040.00818.27
8.3.120.0130.00720.51
8.3.110.0040.01216.50
8.3.100.0090.00024.06
8.3.90.0110.00426.77
8.3.80.0090.00019.36
8.3.70.0030.01316.63
8.3.60.0150.00616.50
8.3.50.0120.00921.20
8.3.40.0110.00418.84
8.3.30.0070.00718.89
8.3.20.0000.00818.54
8.3.10.0080.00021.86
8.3.00.0030.00617.78
8.2.290.0080.00720.43
8.2.280.0060.00218.39
8.2.270.0060.00316.99
8.2.260.0090.00919.07
8.2.250.0080.00016.73
8.2.240.0070.00417.53
8.2.230.0090.00320.94
8.2.220.0080.00037.54
8.2.210.0100.00326.77
8.2.200.0040.00418.88
8.2.190.0080.00816.78
8.2.180.0070.00716.63
8.2.170.0130.01018.91
8.2.160.0140.00719.16
8.2.150.0040.00424.18
8.2.140.0030.00524.66
8.2.130.0040.00421.10
8.2.120.0070.00026.35
8.2.110.0070.00322.21
8.2.100.0060.00617.84
8.2.90.0060.00317.84
8.2.80.0000.00819.23
8.2.70.0040.00417.75
8.2.60.0000.00817.75
8.2.50.0050.00318.16
8.2.40.0040.00419.45
8.2.30.0070.00020.57
8.2.20.0030.00617.75
8.2.10.0040.00417.93
8.2.00.0000.00818.01
8.1.330.0110.00821.72
8.1.320.0040.00617.79
8.1.310.0040.00416.82
8.1.300.0060.01220.15
8.1.290.0060.00330.84
8.1.280.0150.00025.92
8.1.270.0000.00823.71
8.1.260.0040.00428.09
8.1.250.0080.00028.09
8.1.240.0030.00622.54
8.1.230.0120.00020.99
8.1.220.0000.00817.74
8.1.210.0060.00618.77
8.1.200.0030.00617.35
8.1.190.0000.00817.10
8.1.180.0040.00418.10
8.1.170.0000.00717.62
8.1.160.0000.00719.04
8.1.150.0030.00518.84
8.1.140.0040.00419.59
8.1.130.0030.00317.66
8.1.120.0050.00317.47
8.1.110.0070.00017.39
8.1.100.0040.00417.40
8.1.90.0070.00017.33
8.1.80.0040.00417.30
8.1.70.0060.00317.33
8.1.60.0040.00417.55
8.1.50.0080.00017.41
8.1.40.0040.00417.52
8.1.30.0040.00417.60
8.1.20.0040.00417.56
8.1.10.0080.00017.55
8.1.00.0060.00317.57
8.0.300.0040.00420.08
8.0.290.0000.00716.63
8.0.280.0050.00318.50
8.0.270.0030.00317.13
8.0.260.0060.00317.19
8.0.250.0070.00016.96
8.0.240.0040.00416.84
8.0.230.0040.00416.82
8.0.220.0040.00416.88
8.0.210.0000.00816.74
8.0.200.0000.00716.81
8.0.190.0040.00416.86
8.0.180.0000.00716.90
8.0.170.0070.00016.84
8.0.160.0030.00516.89
8.0.150.0030.00516.75
8.0.140.0000.00716.68
8.0.130.0030.00313.28
8.0.120.0040.00416.84
8.0.110.0000.00716.83
8.0.100.0000.00716.71
8.0.90.0040.00416.67
8.0.80.0130.01016.79
8.0.70.0000.00716.95
8.0.60.0040.00416.88
8.0.50.0040.00416.86
8.0.30.0060.01517.11
8.0.20.0090.01117.40
8.0.10.0000.00717.02
8.0.00.0130.01016.65
7.4.330.0000.00615.14
7.4.320.0000.00616.55
7.4.300.0030.00316.66
7.4.290.0000.00716.65
7.4.280.0030.00716.45
7.4.270.0070.00016.64
7.4.260.0020.00516.52
7.4.250.0000.00816.57
7.4.240.0030.00316.66
7.4.230.0030.00516.40
7.4.220.0110.00716.63
7.4.210.0050.00816.57
7.4.200.0030.00316.70
7.4.160.0090.00616.38
7.4.150.0170.02717.40
7.4.140.0160.00517.86
7.4.130.0050.01116.57
7.4.120.0080.01516.56
7.4.110.0100.00716.29
7.4.100.0090.00916.59
7.4.90.0080.00816.64
7.4.80.0060.01719.39
7.4.70.0160.00016.62
7.4.60.0070.01316.59
7.4.50.0070.01116.61
7.4.40.0060.01516.55
7.4.30.0030.01316.71
7.4.00.0010.01514.99
7.3.330.0000.00613.01
7.3.320.0000.00613.04
7.3.310.0030.00316.12
7.3.300.0070.00016.07
7.3.290.0110.00516.17
7.3.280.0060.00916.19
7.3.270.0080.00817.40
7.3.260.0100.00616.16
7.3.250.0090.01016.29
7.3.240.0150.00716.41
7.3.230.0130.00316.41
7.3.210.0100.00716.43
7.3.200.0060.01216.23
7.3.190.0110.00416.19
7.3.180.0000.01716.16
7.3.170.0120.00616.38
7.3.160.0030.01316.18
7.3.120.0070.01114.90
7.3.110.0070.01114.61
7.3.100.0090.00614.37
7.3.90.0100.00014.47
7.3.80.0040.01114.75
7.3.70.0090.00914.62
7.3.60.0110.00414.71
7.3.50.0070.00714.86
7.3.40.0070.00714.72
7.3.30.0070.00414.70
7.3.20.0100.00316.71
7.3.10.0090.00616.72
7.3.00.0060.00616.40
7.2.330.0110.00816.59
7.2.320.0070.01116.52
7.2.310.0090.01016.29
7.2.300.0100.00716.46
7.2.290.0060.00916.57
7.2.250.0060.01015.11
7.2.240.0070.01314.68
7.2.230.0090.00614.86
7.2.220.0100.00314.55
7.2.210.0110.00414.84
7.2.200.0110.00014.97
7.2.190.0040.01115.00
7.2.180.0060.00614.91
7.2.170.0000.00814.94
7.2.130.0090.00016.68
7.2.120.0070.01016.51
7.2.110.0060.00316.89
7.2.100.0000.01116.56
7.2.90.0040.00716.81
7.2.80.0030.01116.92
7.2.70.0040.01116.58
7.2.60.0040.00616.80
7.2.50.0060.01216.57
7.2.40.0060.01016.84
7.2.30.0000.01416.82
7.2.20.0000.01016.77
7.2.10.0120.00316.97
7.2.00.0080.00718.13
7.1.330.0060.01115.79
7.1.320.0030.01015.32
7.1.310.0070.00715.57
7.1.300.0030.01315.50
7.1.290.0030.01015.60
7.1.280.0000.01215.86
7.1.270.0090.00315.74
7.1.260.0070.01015.79
7.1.250.0090.00315.84
7.1.200.0210.00414.98
7.1.100.0040.01118.07
7.1.70.0040.00817.02
7.1.60.0000.01117.16
7.1.00.0030.07722.40
7.0.200.0030.01316.71
7.0.60.0200.06019.87
7.0.50.0100.08720.34
7.0.40.0430.07320.45
7.0.30.0230.06720.20
7.0.20.0300.06020.42
7.0.10.0170.06720.34
7.0.00.0330.05020.19
5.6.280.0030.07320.89
5.6.210.0030.04020.72
5.6.200.0100.07321.15
5.6.190.0370.06320.98
5.6.180.0330.05721.02
5.6.170.0270.05721.10
5.6.160.0200.06021.04
5.6.150.0300.05021.13
5.6.140.0300.05020.93
5.6.130.0330.05720.93
5.6.120.0100.06321.12
5.6.110.0130.05321.11
5.6.100.0200.06021.09
5.6.90.0230.06721.15
5.6.80.0200.04720.53
5.6.70.0330.03720.41
5.6.60.0270.06720.49
5.6.50.0300.06020.48
5.6.40.0200.06020.43
5.6.30.0330.05320.48
5.6.20.0130.05720.48
5.6.10.0200.04720.54
5.6.00.0130.05320.35
5.5.350.0370.07020.40
5.5.340.0130.06020.84
5.5.330.0330.07320.82
5.5.320.0430.06020.88
5.5.310.0230.06020.83
5.5.300.0230.05320.64
5.5.290.0270.05720.79
5.5.280.0230.05020.83
5.5.270.0100.06020.89
5.5.260.0300.06020.84
5.5.250.0300.05320.82
5.5.240.0130.05320.29
5.5.230.0330.06020.35
5.5.220.0370.05020.05
5.5.210.0270.05720.30
5.5.200.0300.05320.04
5.5.190.0400.05020.32
5.5.180.0370.05320.03
5.5.160.0070.06720.21
5.5.150.0300.04720.25
5.5.140.0330.06720.13
5.5.130.0070.06020.03
5.5.120.0200.04320.18
5.5.110.0070.06020.24
5.5.100.0170.06020.11
5.5.90.0270.06720.11
5.5.80.0270.05320.11
5.5.70.0370.05320.10
5.5.60.0300.05320.10
5.5.50.0230.06020.13
5.5.40.0230.05320.01
5.5.30.0330.05020.13
5.5.20.0370.05019.90
5.5.10.0300.05720.09
5.5.00.0400.06019.93

preferences:
34.25 ms | 403 KiB | 5 Q