3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array(); $a = [0,1,2,3,4,5]; $b = [0,1,2,3,4,5]; $c = [0,1,2,3,4,5]; $d = [0,1,2,3,4,5]; $e = [0,1,2,3,4,5]; $f = [0,1,2,3,4,5]; $g = [0,1,2,3,4,5]; $arr[] = $a; $arr[] = $b; $arr[] = $c; $arr[0][2] = $d; $arr[0][2][3] = $e; $arr[2][1] = $f; $arr[1] = $g; print_r($arr); function array_keys_recur($array) { if(!is_array($array)) return false; $keys = array_keys($array); foreach($keys as $k => $key) { $keys[$k] = array_keys_recur($key); } return $keys; } $keys = array_keys_recur($arr); print_r($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)
8.3.60.0100.01016.75
8.3.50.0080.01221.15
8.3.40.0130.00718.84
8.3.30.0150.00018.90
8.3.20.0000.00820.16
8.3.10.0040.00423.63
8.3.00.0040.00419.68
8.2.180.0120.00316.63
8.2.170.0140.00722.96
8.2.160.0070.01020.52
8.2.150.0030.00625.66
8.2.140.0040.00424.66
8.2.130.0000.00826.16
8.2.120.0050.00517.50
8.2.110.0040.00422.14
8.2.100.0090.00317.63
8.2.90.0040.00419.17
8.2.80.0000.00817.97
8.2.70.0040.00417.59
8.2.60.0040.00417.93
8.2.50.0030.00518.07
8.2.40.0040.00419.32
8.2.30.0070.00418.07
8.2.20.0040.00417.76
8.2.10.0060.00318.18
8.2.00.0070.00018.19
8.1.280.0180.00025.92
8.1.270.0040.00420.23
8.1.260.0070.00026.35
8.1.250.0000.00828.09
8.1.240.0090.00022.61
8.1.230.0030.00917.42
8.1.220.0090.00017.77
8.1.210.0040.00418.77
8.1.200.0060.00317.35
8.1.190.0050.00317.36
8.1.180.0000.00818.10
8.1.170.0000.00818.65
8.1.160.0060.00321.95
8.1.150.0000.00718.82
8.1.140.0050.00317.38
8.1.130.0040.00417.65
8.1.120.0040.00417.48
8.1.110.0070.00017.35
8.1.100.0050.00217.45
8.1.90.0040.00317.38
8.1.80.0040.00417.31
8.1.70.0000.00717.42
8.1.60.0080.00017.64
8.1.50.0040.00417.45
8.1.40.0030.00517.59
8.1.30.0030.00617.69
8.1.20.0030.00617.58
8.1.10.0040.00417.41
8.1.00.0030.00617.48
8.0.300.0060.00318.77
8.0.290.0040.00416.75
8.0.280.0040.00418.46
8.0.270.0040.00417.32
8.0.260.0030.00317.34
8.0.250.0040.00417.03
8.0.240.0070.00016.98
8.0.230.0030.00616.93
8.0.220.0040.00416.82
8.0.210.0050.00216.87
8.0.200.0070.00016.86
8.0.190.0040.00716.87
8.0.180.0000.00716.97
8.0.170.0030.00616.84
8.0.160.0000.00816.99
8.0.150.0000.01216.93
8.0.140.0040.00416.87
8.0.130.0000.00813.40
8.0.120.0000.00816.91
8.0.110.0060.00316.74
8.0.100.0040.00416.71
8.0.90.0040.00316.85
8.0.80.0090.00516.97
8.0.70.0050.00316.89
8.0.60.0050.00316.73
8.0.50.0000.00716.85
8.0.30.0110.00716.95
8.0.20.0110.00917.40
8.0.10.0040.00416.83
8.0.00.0130.00816.77
7.4.330.0020.00215.08
7.4.320.0030.00316.52
7.4.300.0030.00316.52
7.4.290.0050.00316.52
7.4.280.0060.00316.66
7.4.270.0040.00416.63
7.4.260.0030.00616.51
7.4.250.0000.01016.60
7.4.240.0020.00516.49
7.4.230.0030.00316.71
7.4.220.0150.00316.62
7.4.210.0090.01016.53
7.4.200.0070.00016.42
7.4.160.0090.00616.56
7.4.150.0110.00817.40
7.4.140.0090.00917.86
7.4.130.0110.00616.60
7.4.120.0090.00916.57
7.4.110.0090.01516.57
7.4.100.0100.00716.64
7.4.90.0070.01016.67
7.4.80.0090.01319.39
7.4.70.0060.01016.58
7.4.60.0100.00616.66
7.4.50.0040.00416.64
7.4.40.0120.00616.21
7.4.30.0100.00916.66
7.4.00.0030.01214.73
7.3.330.0000.00713.22
7.3.320.0060.00013.31
7.3.310.0050.00316.34
7.3.300.0000.00716.39
7.3.290.0110.00616.35
7.3.280.0080.00716.39
7.3.270.0120.00417.40
7.3.260.0140.00416.45
7.3.250.0090.00816.40
7.3.240.0150.00316.41
7.3.230.0120.00916.46
7.3.210.0040.01316.36
7.3.200.0140.00416.38
7.3.190.0110.00516.44
7.3.180.0120.00416.27
7.3.170.0090.01216.27
7.3.160.0150.00416.48
7.2.330.0070.01016.59
7.2.320.0130.00616.70
7.2.310.0120.00616.67
7.2.300.0030.02016.52
7.2.290.0120.00616.85
7.2.80.0000.01416.63
7.2.60.0040.00716.74
7.2.00.0080.00019.59
7.1.200.0030.01015.86
7.1.100.0040.00418.23
7.1.70.0000.00916.93
7.1.60.0150.00919.17
7.1.50.0070.00416.77
7.1.00.0070.07322.36
7.0.200.0110.00016.77
7.0.60.0200.05719.95
7.0.50.0030.06717.87
7.0.40.0130.08020.26
7.0.30.0330.07720.08
7.0.20.0200.07320.33
7.0.10.0000.05020.14
7.0.00.0100.08720.23
5.6.280.0030.07020.90
5.6.210.0030.04020.76
5.6.200.0100.08718.14
5.6.190.0030.04320.39
5.6.180.4000.04020.33
5.6.170.0330.04720.55
5.6.160.0070.08720.46
5.6.150.0030.05018.15
5.6.140.0030.07018.19
5.6.130.0070.09018.14
5.6.120.0030.08021.00
5.6.110.0030.09021.16
5.6.100.0170.07020.98
5.6.90.0070.04321.11
5.6.80.0030.04020.42
5.6.70.0100.07720.49
5.5.350.0070.05020.41
5.5.340.0070.03318.09
5.5.330.0100.04020.34
5.5.320.0300.07720.20
5.5.310.0370.07320.36
5.5.300.0070.07718.04
5.5.290.0030.08018.01
5.5.280.0100.08720.70
5.5.270.0100.08020.77
5.5.260.0100.08320.80
5.5.250.0100.08020.59
5.5.240.0200.04720.27
5.4.450.0970.08319.27
5.4.440.0870.06019.49
5.4.430.1030.04019.43
5.4.420.1000.04319.56
5.4.410.1030.06719.14
5.4.400.0830.05719.07
5.4.390.0830.06319.09
5.4.380.0900.05319.16
5.4.370.1030.04319.09
5.4.360.1130.04718.73
5.4.350.0900.05318.77
5.4.340.0900.05719.05
5.4.320.0930.05019.12
5.4.310.0970.04318.95
5.4.300.0670.05719.21
5.4.290.0700.05318.95
5.4.280.0900.05719.10
5.4.270.0830.05718.92
5.4.260.0870.05018.77
5.4.250.0970.06019.15
5.4.240.0900.04718.90
5.4.230.0900.05318.94
5.4.220.0900.06019.10
5.4.210.0870.06318.91
5.4.200.0930.06319.21
5.4.190.0970.05018.94
5.4.180.0700.05318.70
5.4.170.0730.05018.76
5.4.160.0670.06019.08
5.4.150.0800.04719.10
5.4.140.0700.05716.33
5.4.130.0600.06016.43
5.4.120.0730.05016.37
5.4.110.0800.04316.45
5.4.100.0670.05316.58
5.4.90.0870.05016.44
5.4.80.0870.06016.18
5.4.70.0270.03716.31
5.4.60.0270.04716.54
5.4.50.0030.03716.35
5.4.40.0270.04016.55
5.4.30.0070.07016.52
5.4.20.0200.07316.39

preferences:
44.2 ms | 401 KiB | 5 Q