3v4l.org

run code in 300+ PHP versions simultaneously
<?php $k = (string)"0"; $a = array( 'name' => 'a', $k => 'null' ); $b = array( 'name' => 'b', $k => 'zero' ); $c = array( 'name' => 'c' ); $c["$k"] = 'zeronull'; var_dump($a); var_dump($b); var_dump($c); var_dump(array_merge($a, $b)); var_dump(array_merge($a, $c)); var_dump(array_merge($a, $b, $c));

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)
8.3.40.0110.00718.83
8.3.30.0040.01118.88
8.3.20.0070.00020.16
8.3.10.0040.00421.80
8.3.00.0040.00420.64
8.2.170.0120.00322.96
8.2.160.0030.01019.04
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0080.00019.25
8.2.110.0090.00022.26
8.2.100.0000.01219.57
8.2.90.0040.00419.21
8.2.80.0040.00417.97
8.2.70.0030.00617.63
8.2.60.0080.00018.04
8.2.50.0040.00418.07
8.2.40.0000.00818.09
8.2.30.0000.00818.06
8.2.20.0040.00417.78
8.2.10.0050.00317.66
8.2.00.0030.00617.87
8.1.270.0030.00622.15
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0060.00323.88
8.1.230.0030.01019.02
8.1.220.0060.00317.74
8.1.210.0000.00818.77
8.1.200.0040.00717.35
8.1.190.0000.00817.53
8.1.180.0040.00418.64
8.1.170.0060.00318.53
8.1.160.0040.00422.21
8.1.150.0040.00418.59
8.1.140.0000.00717.41
8.1.130.0030.00317.91
8.1.120.0000.00717.44
8.1.110.0060.00317.39
8.1.100.0040.00417.37
8.1.90.0000.00717.38
8.1.80.0040.00417.46
8.1.70.0000.00717.39
8.1.60.0060.00317.61
8.1.50.0040.00417.42
8.1.40.0000.00817.57
8.1.30.0040.00417.49
8.1.20.0040.00417.66
8.1.10.0040.00417.57
8.1.00.0000.00717.38
8.0.300.0030.00318.77
8.0.290.0040.00417.16
8.0.280.0000.00718.45
8.0.270.0000.00817.14
8.0.260.0030.00316.84
8.0.250.0030.00317.03
8.0.240.0070.00016.94
8.0.230.0030.00316.86
8.0.220.0000.00716.91
8.0.210.0000.00716.98
8.0.200.0000.00816.95
8.0.190.0070.00017.02
8.0.180.0040.00416.80
8.0.170.0050.00216.93
8.0.160.0090.00016.86
8.0.150.0000.00716.85
8.0.140.0000.00716.87
8.0.130.0030.00313.28
8.0.120.0000.00816.83
8.0.110.0040.00416.96
8.0.100.0000.00816.92
8.0.90.0040.00416.71
8.0.80.0090.00616.93
8.0.70.0050.00216.83
8.0.60.0000.00716.98
8.0.50.0030.00516.87
8.0.30.0170.00516.94
8.0.20.0080.01517.40
8.0.10.0030.00616.91
8.0.00.0150.00616.51
7.4.330.0050.00015.00
7.4.320.0000.00616.62
7.4.300.0000.00616.61
7.4.290.0030.00316.52
7.4.280.0040.00416.62
7.4.270.0020.00516.56
7.4.260.0040.00416.61
7.4.250.0080.00016.50
7.4.240.0030.00316.57
7.4.230.0030.00316.37
7.4.220.0070.01116.58
7.4.210.0060.00916.57
7.4.200.0030.00316.42
7.4.190.0000.00716.47
7.4.160.0100.00616.55
7.4.150.0000.01917.40
7.4.140.0090.00917.86
7.4.130.0050.01416.54
7.4.120.0090.00816.47
7.4.110.0130.00316.48
7.4.100.0070.01316.43
7.4.90.0140.00416.55
7.4.80.0080.01119.39
7.4.70.0100.01416.46
7.4.60.0100.00716.49
7.4.50.0040.00416.34
7.4.40.0070.01122.77
7.4.30.0100.00716.44
7.4.00.0060.00914.94
7.3.330.0050.00013.25
7.3.320.0030.00313.30
7.3.310.0040.00416.29
7.3.300.0030.00316.25
7.3.290.0050.01016.45
7.3.280.0110.00716.42
7.3.270.0090.00917.40
7.3.260.0110.00716.50
7.3.250.0120.00916.49
7.3.240.0080.01116.36
7.3.230.0140.00616.41
7.3.210.0090.00816.37
7.3.200.0070.01019.39
7.3.190.0070.01016.54
7.3.180.0090.00616.43
7.3.170.0100.00716.40
7.3.160.0130.00316.41
7.3.120.0030.01415.09
7.2.330.0030.01516.59
7.2.320.0060.01816.61
7.2.310.0060.01216.22
7.2.300.0080.01216.58
7.2.290.0060.01216.55
7.2.00.0040.01119.43
7.1.100.0060.00918.31
7.1.70.0000.01017.34
7.1.60.0100.01419.82
7.1.50.0090.01617.11
7.1.00.0030.04022.54
7.0.200.0090.00316.54
7.0.140.0030.07321.95
7.0.60.0070.06319.86
7.0.50.0030.04717.80
7.0.40.0070.05719.98
7.0.30.0300.06320.30
7.0.20.0330.07320.33
7.0.10.0270.08320.16
7.0.00.0030.04320.18
5.6.280.0030.07321.04
5.6.210.0070.03720.66
5.6.200.0030.06018.16
5.6.190.0030.07020.41
5.6.180.4100.04720.55
5.6.170.0300.05320.46
5.6.160.0100.08020.49
5.6.150.0030.04718.19
5.6.140.0070.06018.08
5.6.130.0030.06718.11
5.6.120.0100.08021.15
5.6.110.0100.03721.08
5.6.100.0000.04721.00
5.6.90.0130.08321.12
5.6.80.0100.07720.28
5.6.70.3970.03320.43
5.5.350.0170.05020.52
5.5.340.0030.08317.92
5.5.330.0100.08020.21
5.5.320.0200.04720.31
5.5.310.0200.05720.12
5.5.300.0070.06317.93
5.5.290.0130.04717.95
5.5.280.0100.06020.73
5.5.270.0070.05020.67
5.5.260.0070.07720.89
5.5.250.0070.08320.46
5.5.240.0070.08320.34
5.4.450.0670.07319.48
5.4.440.0930.05719.48
5.4.430.0870.04719.54
5.4.420.0570.05719.52
5.4.410.0730.07019.35
5.4.400.0430.06318.61
5.4.390.0370.07318.69
5.4.380.0200.08018.64
5.4.370.0300.04018.61
5.4.360.0200.04718.63
5.4.350.0130.05718.63
5.4.340.0230.04718.69
5.4.320.0070.03512.46
5.4.310.0080.03512.45
5.4.300.0110.03812.46
5.4.290.0050.04512.45
5.4.280.0070.03612.35
5.4.270.0080.03712.35
5.4.260.0270.05018.83
5.4.250.0030.05718.88
5.4.240.0130.07718.64
5.4.230.0100.08018.89
5.4.220.0130.05018.71
5.4.210.0000.06718.79
5.4.200.0070.05318.73
5.4.190.0130.04718.86
5.4.180.0130.07018.79
5.4.170.0070.05718.76
5.4.160.0070.05018.98
5.4.150.0070.07718.71
5.4.140.0100.04716.46
5.4.130.0070.07016.27
5.4.120.0030.05716.28
5.4.110.0030.05716.50
5.4.100.0130.04716.34
5.4.90.0000.06716.39
5.4.80.0070.05016.26
5.4.70.0100.05716.23
5.4.60.0100.05016.40
5.4.50.0070.05316.22
5.4.40.0200.03716.36
5.4.30.0100.05016.45
5.4.20.0100.04316.22
5.4.10.0070.05016.30
5.4.00.0100.04715.91
5.3.290.0040.05412.80
5.3.280.0170.05014.75
5.3.270.0100.05314.30
5.3.260.0070.07014.60
5.3.250.0100.07314.61
5.3.240.0130.04314.46
5.3.230.0070.05714.37
5.3.220.0130.04314.57
5.3.210.0100.06714.57
5.3.200.0130.04314.60
5.3.190.0100.07014.26
5.3.180.0000.06714.34
5.3.170.0070.06714.56
5.3.160.0130.04314.57
5.3.150.0130.06714.58
5.3.140.0130.06714.55
5.3.130.0130.07014.56
5.3.120.0170.04314.41
5.3.110.0170.04314.64
5.3.100.0170.06013.80
5.3.90.0070.05013.89
5.3.80.0030.05013.93
5.3.70.0100.04714.03
5.3.60.0100.04714.00
5.3.50.0130.04013.89
5.3.40.0070.05713.82
5.3.30.0070.05013.79
5.3.20.0000.05313.84
5.3.10.0100.04713.70
5.3.00.0070.04713.41
5.2.170.0100.03711.26
5.2.160.0030.04711.06
5.2.150.0170.04711.29
5.2.140.0100.04310.97
5.2.130.0030.04310.94
5.2.120.0030.04011.10
5.2.110.0070.03711.03
5.2.100.0070.05711.11
5.2.90.0000.04310.98
5.2.80.0030.04310.99
5.2.70.0170.02711.03
5.2.60.0070.04010.96
5.2.50.0000.04711.04
5.2.40.0070.03711.02
5.2.30.0030.05010.97
5.2.20.0030.04710.97
5.2.10.0130.04710.76
5.2.00.0000.05310.48
5.1.60.0030.0439.88
5.1.50.0100.03310.14
5.1.40.0070.03310.04
5.1.30.0000.04710.41
5.1.20.0170.04010.56
5.1.10.0070.03310.12
5.1.00.0100.0279.91
5.0.50.0070.0378.77
5.0.40.0000.0338.29
5.0.30.0070.0378.27
5.0.20.0030.0278.43
5.0.10.0100.0208.08
5.0.00.0100.0508.20
4.4.90.0070.0177.60
4.4.80.0000.0237.60
4.4.70.0070.0277.60
4.4.60.0000.0307.60
4.4.50.0100.0137.60
4.4.40.0070.0437.60
4.4.30.0070.0207.60
4.4.20.0070.0237.60
4.4.10.0030.0207.60
4.4.00.0100.0337.60
4.3.110.0100.0207.60
4.3.100.0070.0177.60
4.3.90.0100.0137.60
4.3.80.0030.0337.60
4.3.70.0030.0207.60
4.3.60.0000.0237.60
4.3.50.0000.0337.60
4.3.40.0030.0407.60
4.3.30.0030.0207.60
4.3.20.0000.0237.60
4.3.10.0100.0237.60
4.3.00.0100.0137.70

preferences:
39.65 ms | 400 KiB | 5 Q