3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ['0' => 'value']; $keys = array_keys($a); var_dump($a); var_dump($keys);

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)
8.3.60.0140.00416.13
8.3.50.0080.00618.18
8.3.40.0120.00318.59
8.3.30.0070.00718.48
8.3.20.0040.00421.77
8.3.10.0080.00023.67
8.3.00.0050.00319.13
8.2.180.0060.01518.16
8.2.170.0090.00622.96
8.2.160.0100.00722.16
8.2.150.0070.00024.18
8.2.140.0040.00424.66
8.2.130.0000.00817.97
8.2.120.0070.00026.35
8.2.110.0060.00321.00
8.2.100.0070.00419.52
8.2.90.0080.00017.74
8.2.80.0000.00817.97
8.2.70.0030.00517.55
8.2.60.0040.00418.22
8.2.50.0040.00418.10
8.2.40.0040.00420.53
8.2.30.0040.00419.13
8.2.20.0070.00017.89
8.2.10.0050.00218.04
8.2.00.0070.00017.54
8.1.280.0100.00725.92
8.1.270.0070.00020.32
8.1.260.0040.00426.35
8.1.250.0000.00828.09
8.1.240.0100.00023.92
8.1.230.0040.00720.89
8.1.220.0080.00017.78
8.1.210.0000.00918.84
8.1.200.0070.00317.35
8.1.190.0040.00417.23
8.1.180.0040.00418.10
8.1.170.0040.00420.11
8.1.160.0040.00418.67
8.1.150.0050.00220.16
8.1.140.0000.00719.50
8.1.130.0030.00518.92
8.1.120.0030.00417.32
8.1.110.0030.00617.43
8.1.100.0000.00717.27
8.1.90.0050.00317.38
8.1.80.0050.00317.39
8.1.70.0050.00317.41
8.1.60.0050.00317.43
8.1.50.0040.00417.45
8.1.40.0050.00217.32
8.1.30.0040.00417.50
8.1.20.0000.00817.52
8.1.10.0040.00417.38
8.1.00.0060.00317.30
8.0.300.0000.00819.82
8.0.290.0080.00016.63
8.0.280.0000.00818.45
8.0.270.0070.00016.73
8.0.260.0030.00717.04
8.0.250.0030.00316.77
8.0.240.0030.00316.87
8.0.230.0030.00316.88
8.0.220.0040.00316.78
8.0.210.0070.00016.79
8.0.200.0030.00316.90
8.0.190.0070.00016.82
8.0.180.0000.00716.80
8.0.170.0000.00716.87
8.0.160.0040.00416.76
8.0.150.0080.00016.65
8.0.140.0000.00716.70
8.0.130.0030.00313.29
8.0.120.0000.00716.77
8.0.110.0000.00716.59
8.0.100.0060.00316.68
8.0.90.0050.00216.81
8.0.80.0120.00316.75
8.0.70.0000.00716.85
8.0.60.0070.00016.87
8.0.50.0040.00416.64
8.0.30.0030.01617.09
8.0.20.0080.01117.40
8.0.10.0040.00416.75
8.0.00.0110.00816.63
7.4.330.0030.00315.55
7.4.320.0000.00716.44
7.4.300.0030.00316.49
7.4.290.0070.00016.43
7.4.280.0000.00716.32
7.4.270.0000.00716.57
7.4.260.0040.00416.35
7.4.250.0030.00316.48
7.4.240.0050.00316.44
7.4.230.0040.00416.53
7.4.220.0030.02316.36
7.4.210.0060.00916.39
7.4.200.0030.00516.47
7.4.160.0090.00816.38
7.4.150.0040.01517.40
7.4.140.0130.00517.86
7.4.130.0090.00816.39
7.4.120.0120.00716.36
7.4.110.0100.01216.33
7.4.100.0070.01316.22
7.4.90.0090.00916.33
7.4.80.0170.00019.39
7.4.70.0120.00616.36
7.4.60.0160.00616.41
7.4.50.0110.00316.16
7.4.40.0120.00416.46
7.4.30.0060.01216.49
7.4.00.0110.00614.81
7.3.330.0030.00313.07
7.3.320.0020.00212.96
7.3.310.0000.00715.93
7.3.300.0040.00416.13
7.3.290.0040.01016.12
7.3.280.0110.00616.12
7.3.270.0140.00317.40
7.3.260.0120.00616.25
7.3.250.0070.01016.16
7.3.240.0130.00816.28
7.3.230.0130.00316.28
7.3.210.0110.01116.14
7.3.200.0120.00616.28
7.3.190.0080.00816.11
7.3.180.0080.00816.20
7.3.170.0120.00616.23
7.3.160.0090.00916.32
7.3.120.0040.01114.60
7.3.110.0110.00714.52
7.3.100.0110.00314.60
7.3.90.0080.00414.52
7.3.80.0060.00314.92
7.3.70.0030.00714.86
7.3.60.0110.00314.75
7.3.50.0030.00914.62
7.3.40.0000.01114.66
7.3.30.0040.01114.75
7.3.20.0070.01116.34
7.3.10.0100.00716.43
7.3.00.0050.00516.40
7.2.330.0000.01916.66
7.2.320.0180.00016.60
7.2.310.0130.00816.52
7.2.300.0100.01416.55
7.2.290.0100.01416.33
7.2.250.0050.01514.88
7.2.240.0100.00714.53
7.2.230.0110.00414.76
7.2.220.0090.00914.55
7.2.210.0060.00914.86
7.2.200.0040.01114.79
7.2.190.0040.01114.77
7.2.180.0030.00715.09
7.2.170.0070.01114.96
7.2.130.0060.00916.93
7.2.120.0000.01016.83
7.2.110.0080.00616.82
7.2.100.0100.00316.81
7.2.90.0040.01116.57
7.2.80.0040.00716.86
7.2.70.0140.00016.96
7.2.60.0070.00616.73
7.2.50.0090.00016.59
7.2.40.0040.00816.93
7.2.30.0070.00716.89
7.2.20.0030.00616.69
7.2.10.0030.00716.70
7.2.00.0060.00616.87
7.1.330.0000.01315.77
7.1.320.0070.01015.48
7.1.310.0080.00415.78
7.1.300.0080.00415.59
7.1.290.0030.01015.62
7.1.280.0030.01515.75
7.1.270.0080.00615.76
7.1.260.0030.01315.73
7.1.250.0070.00715.62
7.1.70.0030.00517.09
7.1.60.0100.00317.19
7.1.10.0070.06022.48
7.1.00.0070.05722.60
7.0.200.0030.01016.80
7.0.140.0070.06021.96
7.0.130.0000.06321.97
7.0.120.0030.06022.14
7.0.110.0170.04722.01
7.0.100.0100.05322.14
7.0.90.0100.05722.13
7.0.80.0030.06021.95
7.0.70.0100.05322.08
7.0.60.0070.06022.12
7.0.50.0030.06022.00
7.0.40.0070.05322.14
7.0.30.0070.05722.05
7.0.20.0070.05722.19
7.0.10.0100.05322.15
7.0.00.0170.04722.08

preferences:
62.1 ms | 400 KiB | 5 Q