3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = ["A" => "a", "B" => ["C"=> "c", "D"=> "d"]]; function array_flatten($array) { $return = array(); foreach ($array as $key => $value) { if (is_array($value)) $return = array_merge($return, array_flatten($value)); else {$return[$key] = $value;} } return $return; } print_r(array_flatten($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)
8.4.140.0120.01017.48
8.4.130.0050.00920.48
8.4.120.0060.00224.14
8.4.110.0060.00420.50
8.4.100.0120.00817.72
8.4.90.0110.00917.81
8.4.80.0100.00917.70
8.4.70.0070.00117.91
8.4.60.0110.01118.51
8.4.50.0050.00417.86
8.4.40.0090.00917.55
8.4.30.0090.00922.46
8.4.20.0070.01420.79
8.4.10.0030.00619.55
8.3.270.0140.00616.49
8.3.260.0090.00516.28
8.3.250.0050.00319.11
8.3.240.0110.00817.13
8.3.230.0110.00816.46
8.3.220.0050.00517.12
8.3.210.0130.00616.63
8.3.200.0110.01016.56
8.3.190.0040.00416.55
8.3.180.0110.00816.62
8.3.170.0110.00716.66
8.3.160.0080.00017.18
8.3.150.0060.01216.79
8.3.140.0040.00417.23
8.3.130.0130.00618.43
8.3.120.0080.00019.11
8.3.110.0160.00016.72
8.3.100.0030.00616.80
8.3.90.0100.00516.64
8.3.80.0090.00018.17
8.3.70.0090.00616.73
8.3.60.0120.00318.31
8.3.50.0100.01021.97
8.3.40.0060.00918.67
8.3.30.0110.00418.57
8.3.20.0040.00420.81
8.3.10.0080.00020.15
8.3.00.0080.00023.53
8.2.290.0050.00320.62
8.2.280.0060.00218.28
8.2.270.0070.01016.68
8.2.260.0110.00416.92
8.2.250.0080.00017.47
8.2.240.0050.00318.21
8.2.230.0090.00020.94
8.2.220.0030.00624.06
8.2.210.0040.00426.77
8.2.200.0120.00017.93
8.2.190.0060.00916.75
8.2.180.0070.00716.50
8.2.170.0030.01722.96
8.2.160.0100.00321.10
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0080.00021.13
8.2.110.0070.00319.03
8.2.100.0090.00317.91
8.2.90.0050.00317.75
8.2.80.0040.00418.78
8.2.70.0040.00417.63
8.2.60.0030.00617.63
8.2.50.0080.00017.63
8.2.40.0000.00818.09
8.2.30.0070.00018.15
8.2.20.0040.00418.01
8.2.10.0040.00419.29
8.2.00.0000.00719.20
8.1.330.0100.01022.07
8.1.320.0150.00516.13
8.1.310.0030.00518.07
8.1.300.0040.00418.45
8.1.290.0000.00918.88
8.1.280.0060.01325.92
8.1.270.0040.00422.19
8.1.260.0030.00526.35
8.1.250.0040.00428.09
8.1.240.0040.00722.02
8.1.230.0040.00820.95
8.1.220.0090.00018.63
8.1.210.0030.00618.77
8.1.200.0060.00317.36
8.1.190.0000.00817.23
8.1.180.0060.00319.13
8.1.170.0040.00418.62
8.1.160.0070.00018.79
8.1.150.0040.00418.96
8.1.140.0000.00718.95
8.1.130.0030.00320.15
8.1.120.0000.00717.49
8.1.110.0040.00417.52
8.1.100.0000.00717.46
8.1.90.0060.00317.47
8.1.80.0000.00917.36
8.1.70.0050.00517.52
8.1.60.0040.00717.50
8.1.50.0020.00517.52
8.1.40.0030.00617.41
8.1.30.0030.00517.63
8.1.20.0040.00417.55
8.1.10.0060.00317.48
8.1.00.0030.00617.44
8.0.300.0040.00419.89
8.0.290.0000.00716.63
8.0.280.0040.00418.46
8.0.270.0030.00516.68
8.0.260.0030.00320.27
8.0.250.0000.00816.88
8.0.240.0000.00616.87
8.0.230.0030.00516.86
8.0.220.0070.00016.77
8.0.210.0030.00316.89
8.0.200.0030.00316.95
8.0.190.0000.00817.00
8.0.180.0040.00416.94
8.0.170.0030.00516.80
8.0.160.0000.00816.91
8.0.150.0030.00316.79
8.0.140.0040.00416.83
8.0.130.0000.00613.38
8.0.120.0000.00816.86
8.0.110.0020.00516.93
8.0.100.0030.00516.78
8.0.90.0030.00616.68
8.0.80.0120.00416.82
8.0.70.0080.00016.94
8.0.60.0070.00016.75
8.0.50.0040.00416.92
8.0.30.0120.00817.16
8.0.20.0100.01016.96
8.0.10.0000.00716.89
8.0.00.0090.01116.74
7.4.330.0030.00315.55
7.4.320.0000.00616.46
7.4.300.0060.00016.46
7.4.290.0040.00416.55
7.4.280.0040.00416.48
7.4.270.0030.00316.42
7.4.260.0000.00716.50
7.4.250.0000.00716.48
7.4.240.0020.00516.62
7.4.230.0070.00016.61
7.4.220.0030.00316.36
7.4.210.0040.01216.65
7.4.200.0070.00016.59
7.4.130.0150.00616.49
7.4.120.0030.01716.40
7.4.110.0070.01016.48
7.4.100.0090.00916.49
7.4.90.0110.00516.70
7.4.80.0070.01119.39
7.4.70.0080.01116.50
7.4.60.0110.00616.52
7.4.50.0110.00716.50
7.4.40.0100.00616.66
7.4.00.0070.01015.01
7.3.330.0020.00213.23
7.3.320.0000.00513.38
7.3.310.0030.00316.40
7.3.300.0000.00716.42
7.3.290.0030.00316.42
7.3.280.0130.00316.35
7.3.260.0110.00716.43
7.3.240.0100.00916.41
7.3.230.0110.00716.65
7.3.210.0060.01616.43
7.3.200.0080.00816.56
7.3.190.0030.01316.48
7.3.180.0100.00716.32
7.3.170.0070.01016.53
7.3.160.0150.00816.45
7.3.60.0060.00614.79
7.3.50.0070.00714.61
7.3.40.0070.00414.90
7.3.30.0110.00014.78
7.3.20.0160.00314.69
7.3.10.0090.01614.77
7.3.00.0190.00314.95
7.2.330.0070.01016.67
7.2.320.0110.01116.46
7.2.310.0130.00316.64
7.2.300.0000.01616.78
7.2.290.0170.00416.67
7.2.190.0110.01114.85
7.2.180.0030.01015.07
7.2.170.0030.00814.89
7.2.160.0050.00515.01
7.2.150.0270.00715.07
7.2.140.0140.00615.03
7.2.130.0180.00014.95
7.2.120.0110.00415.00
7.2.110.0090.00614.80
7.2.100.0180.00715.08
7.2.90.0160.01315.20
7.2.80.0100.00615.09
7.2.70.0150.00614.98
7.2.60.0140.01415.04
7.2.50.0100.00715.03
7.2.40.0070.00715.19
7.2.30.0110.00415.27
7.2.20.0100.00415.03
7.2.10.0060.00815.21
7.2.00.0150.00014.93
7.1.300.0200.01014.10
7.1.290.0080.00814.01
7.1.280.1350.00614.00
7.1.270.0140.00613.70
7.1.260.0160.01013.93
7.1.250.0120.00314.07

preferences:
34.89 ms | 403 KiB | 5 Q