3v4l.org

run code in 300+ PHP versions simultaneously
<?php function refArray($arr) { var_dump($arr); $refs = []; foreach ($arr as $key => $value) $refs[$key] = &$arr[$key]; var_dump($refs); return $refs; } $arr = [3, "hello", 0.8, null]; $referenceArray = refArray($arr); echo "----------------------\r\n"; var_dump($arr); var_dump($referenceArray);

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)
8.3.60.0100.00716.50
8.3.50.0110.00922.03
8.3.40.0110.00418.70
8.3.30.0060.00919.03
8.3.20.0070.00020.18
8.3.10.0080.00021.85
8.3.00.0080.00019.26
8.2.180.0110.01118.16
8.2.170.0130.00622.96
8.2.160.0000.01422.08
8.2.150.0080.00824.18
8.2.140.0000.00824.66
8.2.130.0060.00326.16
8.2.120.0060.00317.80
8.2.110.0060.00320.51
8.2.100.0090.00318.22
8.2.90.0050.00319.35
8.2.80.0040.00417.97
8.2.70.0000.00817.63
8.2.60.0080.00018.16
8.2.50.0030.00618.07
8.2.40.0080.00018.28
8.2.30.0070.00019.51
8.2.20.0040.00417.84
8.2.10.0050.00218.01
8.2.00.0040.00417.76
8.1.280.0190.00025.92
8.1.270.0090.00018.82
8.1.260.0040.00426.35
8.1.250.0030.00728.09
8.1.240.0060.00323.84
8.1.230.0080.00419.00
8.1.220.0040.00417.78
8.1.210.0070.00218.77
8.1.200.0080.00317.13
8.1.190.0030.00617.23
8.1.180.0040.00418.10
8.1.170.0040.00418.72
8.1.160.0000.00822.13
8.1.150.0040.00418.90
8.1.140.0030.00519.15
8.1.130.0050.00317.87
8.1.120.0000.00717.36
8.1.110.0000.00817.46
8.1.100.0030.00517.36
8.1.90.0000.00717.50
8.1.80.0000.00717.29
8.1.70.0030.00317.48
8.1.60.0000.00717.49
8.1.50.0060.00617.47
8.1.40.0080.00017.53
8.1.30.0050.00317.57
8.1.20.0030.00617.58
8.1.10.0040.00417.40
8.1.00.0080.00017.35
8.0.300.0030.00618.77
8.0.290.0040.00416.75
8.0.280.0000.00818.50
8.0.270.0070.00017.18
8.0.260.0000.00817.23
8.0.250.0060.00016.91
8.0.240.0000.00816.99
8.0.230.0070.00016.96
8.0.220.0030.00316.78
8.0.210.0080.00016.80
8.0.200.0030.00316.98
8.0.190.0070.00016.86
8.0.180.0000.00816.94
8.0.170.0040.00416.89
8.0.160.0000.00716.98
8.0.150.0000.00716.75
8.0.140.0040.00416.84
8.0.130.0050.00013.37
8.0.120.0050.00316.86
8.0.110.0050.00316.95
8.0.100.0040.00416.93
8.0.90.0030.00516.80
8.0.80.0030.01716.86
8.0.70.0070.00016.93
8.0.60.0030.00516.90
8.0.50.0040.00416.72
8.0.30.0100.01016.99
8.0.20.0170.00617.40
8.0.10.0050.00316.84
8.0.00.0130.00516.80
7.4.330.0030.00315.03
7.4.320.0030.00316.51
7.4.300.0000.00616.54
7.4.290.0040.00416.38
7.4.280.0000.00816.57
7.4.270.0000.00716.50
7.4.260.0030.00316.40
7.4.250.0070.00016.61
7.4.240.0020.00516.59
7.4.230.0040.00416.68
7.4.220.0040.01416.67
7.4.210.0050.01316.62
7.4.200.0050.00216.50
7.4.160.0080.00816.48
7.4.150.0110.00717.40
7.4.140.0100.00717.86
7.4.130.0130.00716.62
7.4.120.0110.00716.53
7.4.110.0210.00316.48
7.4.100.0070.00816.56
7.4.90.0030.01516.48
7.4.80.0100.01019.39
7.4.70.0060.01516.52
7.4.60.0090.00916.49
7.4.50.0030.00316.56
7.4.40.0120.00916.64
7.4.30.0140.01116.39
7.4.00.0070.00714.92
7.3.330.0060.00013.48
7.3.320.0000.00513.38
7.3.310.0000.00716.18
7.3.300.0000.00716.25
7.3.290.0070.00016.43
7.3.280.0100.00716.37
7.3.270.0000.01817.40
7.3.260.0100.00816.33
7.3.250.0080.01316.54
7.3.240.0100.00716.64
7.3.230.0110.01416.45
7.3.210.0100.01416.59
7.3.200.0070.01019.39
7.3.190.0070.01416.39
7.3.180.0100.00616.49
7.3.170.0090.00916.51
7.3.160.0040.01116.65
7.2.330.0090.00916.80
7.2.320.0120.00916.50
7.2.310.0230.01816.74
7.2.300.0110.00616.78
7.2.290.0030.02016.90
7.2.00.0090.00619.61
7.1.100.0040.01118.06
7.1.70.0000.01116.78
7.1.60.0140.01119.46
7.1.50.0120.00634.53
7.1.00.0070.08722.54
7.0.200.0890.00614.88
7.0.140.0070.07322.12
7.0.100.0130.07719.90
7.0.90.0100.05020.01
7.0.80.0030.05019.90
7.0.70.0000.04319.98
7.0.60.0000.05319.95
7.0.50.0200.02320.32
7.0.40.0000.04320.03
7.0.30.0070.03720.00
7.0.20.0030.04320.02
7.0.10.0030.04320.14
7.0.00.0070.04020.07
5.6.280.0030.06721.14
5.6.250.0030.05320.77
5.6.240.0030.04320.69
5.6.230.0000.05020.59
5.6.220.0130.03020.65
5.6.210.0000.05020.67
5.6.200.0030.04321.07
5.6.190.0030.04721.03
5.6.180.0070.04321.00
5.6.170.0070.04021.13
5.6.160.0100.03721.14
5.6.150.0100.04021.03
5.6.140.0070.03721.00
5.6.130.0030.06321.02
5.6.120.0170.07321.13
5.6.110.0070.05321.13
5.6.100.0100.08321.04
5.6.90.0030.08721.06
5.6.80.0170.04320.31
5.6.70.0100.04320.45
5.6.60.0000.04020.45
5.6.50.0100.03020.43
5.6.40.0070.06320.36
5.6.30.0100.08020.44
5.6.20.0100.03020.41
5.6.10.0070.08020.31
5.6.00.0000.04320.33
5.5.380.0030.04720.39
5.5.370.0070.04320.57
5.5.360.0030.04720.36
5.5.350.0030.04720.42
5.5.340.0030.04720.91
5.5.330.0070.03720.91
5.5.320.0100.04720.78
5.5.310.0070.04020.79
5.5.300.0030.04320.88
5.5.290.0070.04020.76
5.5.280.0000.04320.76
5.5.270.0000.04320.87
5.5.260.0070.08320.63
5.5.250.0030.04020.67
5.5.240.0070.08020.25
5.5.230.0030.04020.22
5.5.220.0030.04320.15
5.5.210.0000.08720.16
5.5.200.0070.06320.23
5.5.190.0100.07720.17
5.5.180.0030.08320.13
5.5.160.0130.07320.17
5.5.150.0030.08020.25
5.5.140.0070.03320.15
5.5.130.0030.07020.11
5.5.120.0030.07020.10
5.5.110.0200.06720.06
5.5.100.0100.07720.14
5.5.90.0070.07720.16
5.5.80.0100.06020.07
5.5.70.0070.05320.03
5.5.60.0070.07320.10
5.5.50.0070.05720.00
5.5.40.0030.07020.06
5.5.30.0100.07020.08
5.5.20.0000.08320.05
5.5.10.0000.04720.13
5.5.00.0000.04720.13
5.4.450.0030.04019.36
5.4.440.0000.04719.40
5.4.430.0130.03319.48
5.4.420.0070.03319.22
5.4.410.0030.03719.23
5.4.400.0100.06319.09
5.4.390.0000.04719.12
5.4.380.0100.05319.16
5.4.370.0030.06318.90
5.4.360.0170.06719.18
5.4.350.0070.07319.16
5.4.340.0030.07019.04
5.4.320.0200.02718.84
5.4.310.0030.07318.88
5.4.300.0030.06318.94
5.4.290.0070.07318.93
5.4.280.0070.05018.84
5.4.270.0070.06019.03
5.4.260.0070.07319.18
5.4.250.0070.08319.17
5.4.240.0170.07319.05
5.4.230.0170.06319.04
5.4.220.0070.07319.22
5.4.210.0100.04719.02
5.4.200.0000.05319.09
5.4.190.0000.08018.93
5.4.180.0030.04319.15
5.4.170.0070.05019.17
5.4.160.0030.06319.07
5.4.150.0070.05018.89
5.4.140.0130.06316.37
5.4.130.0230.05316.42
5.4.120.0000.07316.49
5.4.110.0000.08016.39
5.4.100.0070.05716.50
5.4.90.0100.07016.51
5.4.80.0070.07016.48
5.4.70.0070.05316.43
5.4.60.0100.03316.38
5.4.50.0070.03716.36
5.4.40.0170.06016.34
5.4.30.0030.03716.32
5.4.20.0070.07316.43
5.4.10.0130.07016.44
5.4.00.0070.07315.78
5.3.290.0130.07014.59
5.3.280.0100.05014.48
5.3.270.0070.07314.61
5.3.260.0130.06714.58
5.3.250.0070.04714.66
5.3.240.0030.08314.62
5.3.230.0070.07314.61
5.3.220.0070.07014.63
5.3.210.0100.07314.50
5.3.200.0100.05014.52
5.3.190.0070.05314.57
5.3.180.0130.07014.53
5.3.170.0000.07014.63
5.3.160.0070.05714.70
5.3.150.0100.06714.49
5.3.140.0100.07014.49
5.3.130.0100.08014.50
5.3.120.0100.06314.64
5.3.110.0100.04314.51
5.3.100.0100.06314.11
5.3.90.0030.07014.16
5.3.80.0130.06714.00
5.3.70.0100.07014.07
5.3.60.0070.06713.91
5.3.50.0130.06713.83
5.3.40.0100.05314.00
5.3.30.0100.06314.00
5.3.20.0030.07313.78
5.3.10.0070.07013.72
5.3.00.0030.04313.68
5.2.170.0070.06013.68
5.2.160.0030.05713.68
5.2.150.0030.03313.68
5.2.140.0030.05713.68
5.2.130.0030.06013.68
5.2.120.0070.06013.68
5.2.110.0130.03013.68
5.2.100.0030.04013.68
5.2.90.0030.03713.68
5.2.80.0070.06013.68
5.2.70.0000.06313.68
5.2.60.0000.04313.68
5.2.50.0100.05713.68
5.2.40.0070.04713.68
5.2.30.0000.06713.68
5.2.20.0000.05013.68
5.2.10.0100.05013.68
5.2.00.0070.06013.68
5.1.60.0070.05313.68
5.1.50.0000.05713.68
5.1.40.0000.05313.68
5.1.30.0030.05313.68
5.1.20.0000.05313.68
5.1.10.0000.03313.68
5.1.00.0030.04713.68
5.0.50.0100.01713.68
5.0.40.0070.04313.68
5.0.30.0070.05013.68
5.0.20.0030.03013.68
5.0.10.0070.04313.68
5.0.00.0100.05713.68
4.4.90.0000.02013.68
4.4.80.0000.03713.68
4.4.70.0030.03313.68
4.4.60.0030.03713.68
4.4.50.0000.03713.68
4.4.40.0030.05313.68
4.4.30.0000.03713.68
4.4.20.0070.03313.68
4.4.10.0000.02013.68
4.4.00.0000.05713.68
4.3.110.0070.01313.68
4.3.100.0070.03013.68
4.3.90.0070.02713.68
4.3.80.0070.05013.68
4.3.70.0030.03313.68
4.3.60.0030.03013.68
4.3.50.0000.03313.68
4.3.40.0000.02313.68
4.3.30.0000.03013.68
4.3.20.0000.02713.68
4.3.10.0000.03313.68
4.3.00.0030.03013.68

preferences:
50.22 ms | 401 KiB | 5 Q