3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('foo' => "xyz", null => "abc"); $b = array('bar' => "baz", null => "xyz"); print_r(array_merge_recursive($a,$b)); print_r(merge_old($a,$b)); print_r(merge($a,$b)); function merge(array $a, array $b) { foreach ($b as $key => $value) { if (isset($a[$key])) { if (is_int($key)) { $a[] = $value; } elseif (is_array($value) && is_array($a[$key])) { $a[$key] = merge($a[$key], $value); } else { $a[$key] = $value; } } else { $a[$key] = $value; } } return $a; } function merge_old(array $a, array $b) { foreach ($b as $key => $value) { if (array_key_exists($key, $a)) { if (is_int($key)) { $a[] = $value; } elseif (is_array($value) && is_array($a[$key])) { $a[$key] = merge_old($a[$key], $value); } else { $a[$key] = $value; } } else { $a[$key] = $value; } } return $a; }

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)
8.3.40.0090.00618.79
8.3.30.0110.00420.29
8.3.20.0000.00820.20
8.3.10.0040.00421.91
8.3.00.0040.00422.52
8.2.170.0150.00322.96
8.2.160.0040.01121.96
8.2.150.0080.00024.18
8.2.140.0060.00324.66
8.2.130.0070.00026.16
8.2.120.0040.00420.80
8.2.110.0030.00622.25
8.2.100.0080.00417.84
8.2.90.0000.00919.33
8.2.80.0080.00019.13
8.2.70.0030.00617.75
8.2.60.0000.00817.93
8.2.50.0000.00818.07
8.2.40.0060.00319.97
8.2.30.0080.00019.44
8.2.20.0000.00817.79
8.2.10.0000.00717.69
8.2.00.0080.00017.74
8.1.270.0050.00323.99
8.1.260.0040.00426.35
8.1.250.0000.00828.09
8.1.240.0070.01024.01
8.1.230.0110.00019.02
8.1.220.0000.00817.79
8.1.210.0060.00318.77
8.1.200.0030.00617.22
8.1.190.0000.00817.30
8.1.180.0000.00818.10
8.1.170.0000.00818.64
8.1.160.0040.00418.83
8.1.150.0040.00418.51
8.1.140.0030.00517.36
8.1.130.0000.00717.83
8.1.120.0030.00617.49
8.1.110.0000.00817.47
8.1.100.0070.00017.38
8.1.90.0070.00417.47
8.1.80.0040.00417.48
8.1.70.0070.00017.47
8.1.60.0030.00617.58
8.1.50.0000.00817.52
8.1.40.0040.00417.53
8.1.30.0030.00517.66
8.1.20.0040.00417.70
8.1.10.0070.00017.38
8.1.00.0060.00317.45
8.0.300.0000.00718.77
8.0.290.0000.00717.30
8.0.280.0070.00018.45
8.0.270.0040.00417.25
8.0.260.0000.00616.86
8.0.250.0000.00716.87
8.0.240.0110.00017.00
8.0.230.0050.00316.84
8.0.220.0030.00316.90
8.0.210.0050.00316.82
8.0.200.0060.00016.93
8.0.190.0070.00016.97
8.0.180.0070.00016.89
8.0.170.0040.00416.87
8.0.160.0000.00816.88
8.0.150.0070.00016.92
8.0.140.0000.00716.88
8.0.130.0030.00313.32
8.0.120.0080.00016.88
8.0.110.0000.00716.85
8.0.100.0000.00716.71
8.0.90.0070.00016.95
8.0.80.0090.00616.85
8.0.70.0000.00816.76
8.0.60.0030.00516.91
8.0.50.0000.00716.77
8.0.30.0110.00717.12
8.0.20.0070.01217.40
8.0.10.0070.00017.00
8.0.00.0100.00716.78
7.4.330.0000.00615.00
7.4.320.0030.00316.59
7.4.300.0060.00016.58
7.4.290.0000.00716.45
7.4.280.0100.00016.42
7.4.270.0060.00016.59
7.4.260.0050.00013.22
7.4.250.0030.00316.57
7.4.240.0020.00516.59
7.4.230.0070.00016.70
7.4.220.0030.02316.63
7.4.210.0050.01316.59
7.4.200.0000.00716.48
7.4.190.0030.00516.55
7.4.160.0100.00716.42
7.4.150.0130.00317.40
7.4.140.0100.00817.86
7.4.130.0110.00616.61
7.4.120.0130.00516.47
7.4.110.0070.01016.29
7.4.100.0080.00816.60
7.4.90.0090.01216.49
7.4.80.0090.00919.39
7.4.70.0130.00316.69
7.4.60.0120.00616.53
7.4.50.0060.00016.32
7.4.40.0090.00622.77
7.4.30.0130.00316.58
7.4.10.0040.01115.63
7.4.00.0080.00815.26
7.3.330.0030.00313.24
7.3.320.0000.00513.38
7.3.310.0070.00016.40
7.3.300.0030.00516.43
7.3.290.0060.00916.36
7.3.280.0070.00716.36
7.3.270.0030.01417.40
7.3.260.0030.01316.50
7.3.250.0140.00516.53
7.3.240.0070.01116.43
7.3.230.0000.01716.39
7.3.210.0130.00616.48
7.3.200.0100.00716.59
7.3.190.0070.01016.42
7.3.180.0090.00616.36
7.3.170.0120.00316.55
7.3.160.0080.00816.58
7.3.130.0060.00915.79
7.3.120.0070.00815.39
7.3.110.0030.01415.66
7.3.100.0020.01315.48
7.3.90.0030.01015.61
7.3.80.0050.01015.55
7.3.70.0110.00515.66
7.3.60.0060.00715.72
7.3.50.0060.00815.65
7.3.40.0060.00915.61
7.3.30.0050.01415.51
7.3.20.0080.00617.26
7.3.10.0040.01117.55
7.3.00.0110.00517.36
7.2.330.0140.00416.36
7.2.320.0040.01416.42
7.2.310.0060.01116.70
7.2.300.0110.00616.79
7.2.290.0130.00916.64
7.2.260.0100.01015.76
7.2.250.0040.01615.79
7.2.240.0080.00715.70
7.2.230.0070.00815.62
7.2.220.0090.00515.71
7.2.210.0090.00815.82
7.2.200.0100.00615.80
7.2.190.0080.01115.87
7.2.180.0040.00915.71
7.2.170.0090.00615.76
7.2.160.0050.01115.83
7.2.150.0100.00717.57
7.2.140.0050.00817.57
7.2.130.0040.01217.49
7.2.120.0060.01017.57
7.2.110.0070.00917.61
7.2.100.0080.01017.58
7.2.90.0110.00517.67
7.2.80.0070.01017.46
7.2.70.0060.01217.61
7.2.60.0030.01017.68
7.2.50.0060.00817.67
7.2.40.0020.01117.73
7.2.30.0070.00717.50
7.2.20.0090.00817.57
7.2.10.0060.00817.56
7.2.00.0020.00917.96
7.1.330.0050.00916.67
7.1.320.0070.00916.59
7.1.310.0060.01016.59
7.1.300.0030.01316.78
7.1.290.0070.00916.49
7.1.280.0100.00516.60
7.1.270.0070.00916.56
7.1.260.0070.00916.49
7.1.250.0080.00716.53
7.1.240.0110.00216.57
7.1.230.0090.00616.58
7.1.220.0080.00616.71
7.1.210.0080.00616.68
7.1.200.0090.00716.67
7.1.190.0050.00716.56
7.1.180.0050.00816.68
7.1.170.0060.00816.59
7.1.160.0060.00816.61
7.1.150.0100.00516.56
7.1.140.0050.00616.70
7.1.130.0100.00516.54
7.1.120.0040.00716.50
7.1.110.0050.00916.58
7.1.100.0050.00417.14
7.1.90.0030.00816.54
7.1.80.0080.00516.62
7.1.70.0020.00816.66
7.1.60.0080.01017.48
7.1.50.0040.01416.68
7.1.40.0050.01016.66
7.1.30.0040.00816.66
7.1.20.0100.00316.64
7.1.10.0090.00516.57
7.1.00.0050.02418.54
7.0.330.0040.01116.15
7.0.320.0040.01016.16
7.0.310.0070.00816.29
7.0.300.0060.00516.04
7.0.290.0060.00916.29
7.0.280.0070.00516.12
7.0.270.0050.00616.23
7.0.260.0050.00716.24
7.0.250.0030.01016.20
7.0.240.0040.00916.24
7.0.230.0020.01116.37
7.0.220.0070.00716.31
7.0.210.0000.01416.34
7.0.200.0070.01016.45
7.0.190.0060.00616.28
7.0.180.0030.00816.32
7.0.170.0080.00816.29
7.0.160.0040.00616.19
7.0.150.0070.00716.12
7.0.140.0060.02918.24
7.0.130.0030.00916.33
7.0.120.0050.00916.27
7.0.110.0060.00616.13
7.0.100.0100.03017.54
7.0.90.0090.02617.37
7.0.80.0030.02717.40
7.0.70.0070.01717.48
7.0.60.0070.02117.61
7.0.50.0060.02017.64
7.0.40.0050.02716.20
7.0.30.0040.01916.22
7.0.20.0060.02616.17
7.0.10.0080.01916.24
7.0.00.0060.02316.17
5.6.400.0050.01215.03
5.6.390.0030.01215.17
5.6.380.0070.00314.97
5.6.370.0060.00915.17
5.6.360.0050.00715.28
5.6.350.0060.00615.06
5.6.340.0070.00515.43
5.6.330.0080.00515.36
5.6.320.0050.00815.05
5.6.310.0050.00515.31
5.6.300.0080.00815.45
5.6.290.0030.00715.06
5.6.280.0090.02517.17
5.6.270.0030.01215.37
5.6.260.0060.00615.11
5.6.250.0110.02617.09
5.6.240.0070.03416.99
5.6.230.0070.03116.96
5.6.220.0040.01916.93
5.6.210.0080.01616.97
5.6.200.0040.02017.14
5.6.190.0050.02417.16
5.6.180.0070.02317.27
5.6.170.0040.02517.04
5.6.160.0100.02117.12
5.6.150.0040.03617.22
5.6.140.0040.02117.11
5.6.130.0100.01517.11
5.6.120.0080.02216.99
5.6.110.0070.01817.02
5.6.100.0110.01517.10
5.6.90.0060.01917.11
5.6.80.0060.02516.93
5.6.70.0090.01816.88
5.6.60.0050.02016.87
5.6.50.0060.01816.93
5.6.40.0060.01716.96
5.6.30.0030.02116.95
5.6.20.0040.02016.77
5.6.10.0080.02417.02
5.6.00.0050.02016.86
5.5.380.0090.02916.97
5.5.370.0030.02116.82
5.5.360.0080.01716.81
5.5.350.0090.01416.89
5.5.340.0070.01716.83
5.5.330.0040.02116.97
5.5.320.0050.01816.96
5.5.310.0080.01517.03
5.5.300.0050.02717.03
5.5.290.0020.02217.04
5.5.280.0060.01916.89
5.5.270.0070.02016.94
5.5.260.0030.02316.95
5.5.250.0090.01416.91
5.5.240.0030.03416.71
5.5.230.0060.02116.66
5.5.220.0070.01816.81
5.5.210.0070.01616.63
5.5.200.0030.02316.70
5.5.190.0060.02416.70
5.5.180.0050.01916.84
5.5.170.0100.00814.83
5.5.160.0040.03316.81
5.5.150.0070.02616.64
5.5.140.0080.03016.56
5.5.130.0060.02716.67
5.5.120.0070.02616.81
5.5.110.0060.03216.80
5.5.100.0080.03216.77
5.5.90.0040.03416.65
5.5.80.0070.03116.68
5.5.70.0050.03316.82
5.5.60.0050.03416.77
5.5.50.0110.01716.67
5.5.40.0120.02716.65
5.5.30.0060.03216.73
5.5.20.0090.02616.70
5.5.10.0080.02716.68
5.5.00.0100.02716.63
5.4.450.0020.02014.53
5.4.440.0090.01414.42
5.4.430.0050.02514.41
5.4.420.0040.01814.44
5.4.410.0030.02014.38
5.4.400.0040.01814.21
5.4.390.0050.01414.40
5.4.380.0050.01514.26
5.4.370.0040.01814.34
5.4.360.0020.01914.41
5.4.350.0060.01614.20
5.4.340.0030.02214.20
5.4.330.0100.00311.69
5.4.320.0060.02914.22
5.4.310.0050.03014.39
5.4.300.0060.03014.31
5.4.290.0040.02914.21
5.4.280.0090.02514.42
5.4.270.0030.03214.12
5.4.260.0060.02914.39
5.4.250.0050.01714.24
5.4.240.0030.02614.35
5.4.230.0080.03014.18
5.4.220.0060.03014.24
5.4.210.0050.03014.20
5.4.200.0080.03014.22
5.4.190.0070.02614.26
5.4.180.0070.01614.29
5.4.170.0080.01714.22
5.4.160.0040.03214.15
5.4.150.0060.02814.21
5.4.140.0030.02313.47
5.4.130.0050.03013.47
5.4.120.0110.02213.34
5.4.110.0090.02613.54
5.4.100.0130.01913.45
5.4.90.0070.02613.47
5.4.80.0070.03013.53
5.4.70.0100.01513.38
5.4.60.0070.03013.38
5.4.50.0060.02713.35
5.4.40.0060.03013.46
5.4.30.0080.02513.39
5.4.20.0070.02813.33
5.4.10.0060.02713.40
5.4.00.0060.02613.26
5.3.290.0070.02112.83
5.3.280.0030.03212.64
5.3.270.0060.02912.83
5.3.260.0080.02612.85
5.3.250.0050.03212.70
5.3.240.0080.02712.56
5.3.230.0070.02612.74
5.3.220.0030.03012.74
5.3.210.0020.03112.67
5.3.200.0020.03412.72
5.3.190.0010.02912.73
5.3.180.0100.02412.67
5.3.170.0080.02812.84
5.3.160.0080.01712.82
5.3.150.0070.02712.69
5.3.140.0070.02612.78
5.3.130.0040.02812.85
5.3.120.0050.02812.78
5.3.110.0050.03012.85
5.3.100.0080.02812.65
5.3.90.0080.02412.57
5.3.80.0090.02412.48
5.3.70.0040.02812.53
5.3.60.0010.03212.65
5.3.50.0050.03112.50
5.3.40.0090.02712.50
5.3.30.0060.02612.49
5.3.20.0050.02912.39
5.3.10.0050.02712.36
5.3.00.0090.02812.30
5.2.170.0070.06312.52
5.2.160.0070.05312.52
5.2.150.0070.06012.52
5.2.140.0100.03712.52
5.2.130.0030.03712.52
5.2.120.0100.05712.52
5.2.110.0030.03712.52
5.2.100.0030.06312.52
5.2.90.0030.06012.52
5.2.80.0070.05712.52
5.2.70.0030.03712.52
5.2.60.0100.04712.52
5.2.50.0070.04012.52
5.2.40.0000.06312.52
5.2.30.0030.06712.52
5.2.20.0000.06712.52
5.2.10.0100.06312.52
5.2.00.0070.05712.52
5.1.60.0000.03312.52
5.1.50.0000.05312.52
5.1.40.0070.04712.52
5.1.30.0070.05712.52
5.1.20.0030.03012.52
5.1.10.0030.05312.52
5.1.00.0100.05012.52
5.0.50.0000.05012.52
5.0.40.0070.04012.52
5.0.30.0030.06312.52
5.0.20.0030.02312.52
5.0.10.0070.04012.52
5.0.00.0100.06012.52
4.4.90.0070.03012.52
4.4.80.0070.02012.52
4.4.70.0100.01312.52
4.4.60.0000.04012.52
4.4.50.0030.01712.52
4.4.40.0070.04712.52
4.4.30.0030.03312.52
4.4.20.0070.03012.52
4.4.10.0030.03312.52
4.4.00.0000.06012.52
4.3.110.0030.03312.52
4.3.100.0000.03012.52
4.3.90.0070.03012.52
4.3.80.0030.05012.52
4.3.70.0030.03312.52
4.3.60.0000.03712.52
4.3.50.0000.03012.52
4.3.40.0000.03312.52
4.3.30.0000.02312.52
4.3.20.0000.03712.52
4.3.10.0000.02312.52
4.3.00.0000.03012.52

preferences:
39.44 ms | 400 KiB | 5 Q