3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array( 'key a' => array( 'key b' => 'element b', 'key c' => 'element c', 'key d' => array( 'key e' =>'element e' ), 'key f' => 'element f', 'key g' => 'element g' ), 'key h' => 'element h', 'key i' => array( 'key j' => 'element j', 'key k' => 'element k' ) ); function walk_recursive($arr, &$list = []) { foreach ($arr as $k => $ar) { if (is_array($ar)) { $list[] = $k; walk_recursive($ar, $list); } else { $list[] = $ar; } } return $list; } print_r(walk_recursive($arr));

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)
8.5.30.0120.00619.54
8.5.20.0080.00819.54
8.5.10.0090.00719.69
8.5.00.0180.00819.84
8.4.180.0140.00719.64
8.4.170.0140.00723.76
8.4.160.0130.00923.08
8.4.150.0050.00716.81
8.4.140.0100.01117.25
8.4.130.0040.00617.51
8.4.120.0120.00820.47
8.4.110.0140.00622.48
8.4.100.0110.00818.73
8.4.90.0090.01218.73
8.4.80.0050.00418.77
8.4.70.0120.00717.94
8.4.60.0130.00718.66
8.4.50.0150.00520.55
8.4.40.0040.01819.25
8.4.30.0130.00719.40
8.4.20.0070.01017.57
8.4.10.0000.00919.62
8.3.300.0100.01020.82
8.3.290.0110.01120.61
8.3.280.0130.00618.33
8.3.270.0200.00716.38
8.3.260.0140.00516.69
8.3.250.0110.00818.84
8.3.240.0060.01017.20
8.3.230.0070.00216.61
8.3.220.0120.00518.77
8.3.210.0120.00916.57
8.3.200.0060.00316.57
8.3.190.0100.00617.18
8.3.180.0070.00918.38
8.3.170.0140.00418.89
8.3.160.0110.00718.21
8.3.150.0060.01320.98
8.3.140.0060.00316.71
8.3.130.0030.00518.24
8.3.120.0120.00318.79
8.3.110.0000.01020.94
8.3.100.0120.00416.50
8.3.90.0080.00026.77
8.3.80.0060.00318.68
8.3.70.0110.00418.43
8.3.60.0030.01016.75
8.3.50.0100.00822.17
8.3.40.0100.00718.70
8.3.30.0110.00418.75
8.3.20.0040.00420.21
8.3.10.0000.00721.71
8.3.00.0040.00423.59
8.2.300.0130.00817.94
8.2.290.0100.00820.35
8.2.280.0140.00419.86
8.2.270.0150.00317.12
8.2.260.0050.00518.07
8.2.250.0070.00316.40
8.2.240.0000.00816.90
8.2.230.0070.00022.58
8.2.220.0050.00324.06
8.2.210.0000.00826.77
8.2.200.0150.00016.63
8.2.190.0130.00316.58
8.2.180.0110.00718.42
8.2.170.0110.00422.96
8.2.160.0100.00720.19
8.2.150.0000.00824.18
8.2.140.0090.00024.66
8.2.130.0050.00220.52
8.2.120.0040.00426.35
8.2.110.0060.01021.03
8.2.100.0040.00817.78
8.2.90.0000.00817.88
8.2.80.0040.00417.97
8.2.70.0050.00317.63
8.2.60.0050.00317.63
8.2.50.0060.00317.93
8.2.40.0080.00018.05
8.2.30.0080.00017.64
8.2.20.0040.00418.08
8.2.10.0000.00818.18
8.2.00.0050.00318.18
8.1.340.0130.00917.63
8.1.330.0110.00821.79
8.1.320.0070.01216.24
8.1.310.0030.00518.21
8.1.300.0040.00418.59
8.1.290.0060.00330.84
8.1.280.0090.00625.92
8.1.270.0000.00824.01
8.1.260.0070.00026.35
8.1.250.0030.00528.09
8.1.240.0030.00721.24
8.1.230.0110.00017.82
8.1.220.0050.00317.78
8.1.210.0050.00318.77
8.1.200.0030.00617.13
8.1.190.0040.00417.23
8.1.180.0060.00318.10
8.1.170.0000.00917.65
8.1.160.0040.00418.95
8.1.150.0040.00320.14
8.1.140.0040.00419.69
8.1.130.0070.00019.08
8.1.120.0040.00417.41
8.1.110.0090.00017.43
8.1.100.0000.00717.41
8.1.90.0050.00317.41
8.1.80.0040.00417.52
8.1.70.0050.00217.36
8.1.60.0060.00317.60
8.1.50.0040.00417.44
8.1.40.0030.00517.54
8.1.30.0040.00417.59
8.1.20.0030.00517.53
8.1.10.0030.00517.45
8.1.00.0000.00817.27
8.0.300.0000.00718.77
8.0.290.0060.00316.63
8.0.280.0050.00317.93
8.0.270.0040.00417.93
8.0.260.0030.00317.18
8.0.250.0000.00717.00
8.0.240.0020.00516.95
8.0.230.0070.00016.85
8.0.220.0000.00716.79
8.0.210.0000.00716.76
8.0.200.0040.00416.86
8.0.190.0040.00416.96
8.0.180.0000.00716.91
8.0.170.0060.00316.95
8.0.160.0030.00416.89
8.0.150.0030.00616.86
8.0.140.0070.00016.84
8.0.130.0050.00013.36
8.0.120.0030.00616.82
8.0.110.0040.00416.88
8.0.100.0040.00416.76
8.0.90.0040.00416.96
8.0.80.0030.01916.87
8.0.70.0000.00716.88
8.0.60.0070.00016.84
8.0.50.0000.00716.93
8.0.30.0110.00717.04
8.0.20.0140.00717.40
8.0.10.0070.00017.05
8.0.00.0090.00916.61
7.4.330.0050.00015.55
7.4.320.0030.00316.52
7.4.300.0000.00716.46
7.4.290.0070.00016.50
7.4.280.0130.00016.61
7.4.270.0030.00316.45
7.4.260.0040.00416.59
7.4.250.0020.00516.47
7.4.240.0000.00716.43
7.4.230.0000.00716.58
7.4.220.0130.01316.54
7.4.210.0040.01016.52
7.4.200.0040.00416.39
7.4.160.0070.01116.58
7.4.150.0170.00017.40
7.4.140.0080.01217.86
7.4.130.0090.01116.47
7.4.120.0090.01416.57
7.4.110.0080.01316.46
7.4.100.0080.00816.52
7.4.90.0070.01016.61
7.4.80.0150.00819.39
7.4.70.0050.01116.59
7.4.60.0120.00416.45
7.4.50.0070.01116.54
7.4.40.0120.00316.50
7.4.30.0090.00616.49
7.4.00.0080.00714.93
7.3.330.0050.00013.36
7.3.320.0000.00613.35
7.3.310.0000.00816.36
7.3.300.0030.00316.33
7.3.290.0030.00316.23
7.3.280.0100.01116.33
7.3.270.0120.00917.40
7.3.260.0050.01316.41
7.3.250.0140.00516.52
7.3.240.0100.00716.42
7.3.230.0070.01016.39
7.3.210.0060.01216.41
7.3.200.0120.00616.73
7.3.190.0150.00816.39
7.3.180.0100.01016.44
7.3.170.0120.00616.55
7.3.160.0080.00816.35
7.3.120.0030.01414.70
7.3.110.0070.01115.04
7.3.100.0040.01115.05
7.3.90.0000.00914.82
7.3.80.0060.00314.52
7.3.70.0120.00614.90
7.3.60.0040.01415.04
7.3.50.0030.01014.84
7.3.40.0030.01014.55
7.3.30.0100.00314.71
7.3.20.0060.00616.68
7.3.10.0090.00416.34
7.3.00.0100.00316.59
7.2.330.0100.00716.71
7.2.320.0080.00816.77
7.2.310.0080.00816.45
7.2.300.0060.01816.46
7.2.290.0120.00616.55
7.2.250.0070.01015.13
7.2.240.0090.00914.96
7.2.230.0000.00915.14
7.2.220.0060.00915.00
7.2.210.0060.00914.99
7.2.200.0030.01014.99
7.2.190.0120.00314.83
7.2.180.0000.01714.65
7.2.170.0040.00814.99
7.2.130.0030.01016.88
7.2.120.0030.00916.70
7.2.110.0080.00816.94
7.2.100.0000.01217.11
7.2.90.0030.00617.02
7.2.80.0030.01416.88
7.2.70.0100.00316.85
7.2.60.0050.00717.02
7.2.50.0070.00716.94
7.2.40.0040.00717.01
7.2.30.0060.00616.79
7.2.20.0060.00616.66
7.2.10.0080.00416.64
7.2.00.0080.00316.88
7.1.330.0030.01015.53
7.1.320.0030.01015.79
7.1.310.0000.01415.68
7.1.300.0080.00615.93
7.1.290.0040.01115.53
7.1.280.0000.01015.78
7.1.270.0040.00815.71
7.1.260.0040.00815.70
7.1.250.0070.00315.61
7.1.200.0000.01015.86
7.1.70.0080.00017.01
7.1.60.0080.00417.16
7.1.30.1920.06236.41
7.1.20.2570.08036.51
7.1.10.1630.06020.37
7.1.00.2470.08020.52
7.0.200.0050.00516.70
7.0.170.2130.05319.99
7.0.160.1930.07720.09
7.0.150.1600.06720.08
7.0.140.3030.06319.98
7.0.130.2100.06720.04
7.0.120.1830.06320.04
7.0.110.1870.06720.09
7.0.100.1600.06320.17
7.0.90.1970.05719.95
7.0.80.1500.06720.02
7.0.70.1730.08720.11
7.0.60.1500.05720.20
7.0.50.1970.05720.05
7.0.40.1630.04320.04
7.0.30.2430.05020.04
7.0.20.2330.06320.04
7.0.10.2270.06320.11
7.0.00.1330.05720.02

preferences:
98.21 ms | 1668 KiB | 5 Q