3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = ['a' => 'abc']; $add = ['b' => 'bar', 'a' => 'foo']; echo json_encode(array_merge($arr, count($add) > 1 ? $add : [])); echo "\n---\n"; echo json_encode(array_replace($arr, count($add) > 1 ? $add : [])); echo "\n---\n"; echo json_encode($arr + (count($add) > 1 ? $add : [])); echo "\n---\n"; echo json_encode((count($add) > 1 ? $add : []) + $arr); echo "\n---\n"; echo json_encode([...$arr, ...count($add) > 1 ? $add : []]); echo "\n---\n"; echo json_encode([...count($add) > 1 ? $add : [], ...$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)
8.5.20.0120.00719.61
8.5.10.0050.00520.04
8.5.00.0110.01019.98
8.4.170.0110.01023.88
8.4.160.0110.01023.81
8.4.150.0020.00114.05
8.4.140.0170.00917.54
8.4.130.0090.01317.73
8.4.120.0130.00722.18
8.4.110.0150.00618.86
8.4.100.0100.01117.60
8.4.90.0130.00818.82
8.4.80.0050.00317.54
8.4.70.0140.00617.76
8.4.60.0110.01018.55
8.4.50.0110.00518.73
8.4.40.0110.01119.64
8.4.30.0150.00418.80
8.4.20.0100.01026.05
8.4.10.0100.01023.63
8.3.290.0090.01020.80
8.3.280.0060.01418.29
8.3.270.0030.00416.38
8.3.260.0120.00716.80
8.3.250.0110.00918.80
8.3.240.0100.00916.36
8.3.230.0090.01016.66
8.3.220.0090.00716.78
8.3.210.0100.00916.81
8.3.200.0060.00316.54
8.3.190.0100.00518.68
8.3.180.0140.00616.95
8.3.170.0110.00820.68
8.3.160.0040.00418.30
8.3.150.0090.00617.22
8.3.140.0000.01517.18
8.3.130.0040.00416.70
8.3.120.0000.00818.98
8.3.110.0110.00720.94
8.3.100.0000.00924.06
8.3.90.0040.00426.77
8.3.80.0060.00318.55
8.3.70.0110.00416.75
8.3.60.0140.00718.43
8.3.50.0140.00019.87
8.3.40.0140.00020.23
8.3.30.0070.00718.68
8.3.20.0070.00024.18
8.3.10.0030.01024.66
8.3.00.0110.00426.16
8.2.300.0130.00718.95
8.2.290.0080.01020.65
8.2.280.0130.00618.42
8.2.270.0180.00017.31
8.2.260.0120.00616.56
8.2.250.0080.00018.19
8.2.240.0090.00017.28
8.2.230.0060.00322.58
8.2.220.0100.00037.54
8.2.210.0000.00826.77
8.2.200.0060.00316.38
8.2.190.0080.00816.63
8.2.180.0040.01816.38
8.2.170.0110.01119.04
8.2.160.0070.00722.96
8.2.150.0000.00825.66
8.2.140.0070.00024.66
8.2.130.0070.01026.16
8.2.120.0040.00419.66
8.2.110.0040.00420.57
8.2.100.0070.00317.91
8.2.90.0060.00317.84
8.2.80.0040.00417.63
8.2.70.0080.00017.75
8.2.60.0040.00417.80
8.2.50.0080.00018.07
8.2.40.0080.00021.11
8.2.30.0030.00518.16
8.2.20.0050.00319.24
8.2.10.0000.00717.93
8.2.00.0070.00317.64
8.1.340.0120.00821.78
8.1.330.0110.00721.75
8.1.320.0090.01016.31
8.1.310.0040.00418.47
8.1.300.0000.00920.20
8.1.290.0090.00030.84
8.1.280.0070.00725.92
8.1.270.0040.00424.66
8.1.260.0000.00726.35
8.1.250.0080.00028.09
8.1.240.0000.01122.51
8.1.230.0070.00421.02
8.1.220.0060.00317.74
8.1.210.0000.00818.89
8.1.200.0060.00317.13
8.1.190.0000.00817.00
8.1.180.0040.00418.10
8.1.170.0090.00018.53
8.1.160.0000.00718.88
8.1.150.0000.00818.51
8.1.140.0000.00717.45
8.1.130.0120.00517.43
8.1.120.0100.00517.49
8.1.110.0090.00617.50
8.1.100.0040.01217.50
8.1.90.0060.00917.39
8.1.80.0050.01017.48
8.1.70.0070.01017.51
8.1.60.0110.00417.68
8.1.50.0160.00417.57
8.1.40.0150.00317.54
8.1.30.0120.00617.54
8.1.20.0120.00417.64
8.1.10.0040.00717.57
8.1.00.0120.00217.41
8.0.300.0050.00319.94
8.0.290.0040.00416.75
8.0.280.0030.00318.45
8.0.270.0050.00317.18
8.0.260.0110.00016.92
8.0.250.0100.00016.87
8.0.240.0040.00816.87
8.0.230.0060.00616.96
8.0.220.0040.00716.95
8.0.210.0110.00216.87
8.0.200.0080.00416.94
8.0.190.0060.00316.87
8.0.180.0090.00316.88
8.0.170.0110.00616.93
8.0.160.0100.00316.87
8.0.150.0100.00316.87
8.0.140.0030.01016.91
8.0.130.0070.00716.87
8.0.120.0130.00216.91
8.0.110.0100.00516.87
8.0.100.0110.00516.87
8.0.90.0160.00016.87
8.0.80.0170.00016.90
8.0.70.0030.01216.87
8.0.60.0150.00016.87
8.0.50.0120.00316.87
8.0.30.0120.00316.87
8.0.20.0160.00016.87
8.0.10.0100.00516.96

preferences:
47.55 ms | 403 KiB | 5 Q