3v4l.org

run code in 300+ PHP versions simultaneously
<?php $params = [1,2,3]; function transform(array $params) { $references = []; foreach ($params as $key => $value) { $references[$key] = &$params[$key]; } unset($value); $value = "foo"; return $references; return $references; } var_dump($params); $params = transform($params); var_dump($params); $hovno = 'prdel'; $prdel = &$hovno; var_dum($hovno); var_dump($prdel);

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)
8.3.40.0040.01119.06
8.3.30.0140.00318.73
8.3.20.0040.00420.22
8.3.10.0070.00023.54
8.3.00.0080.00019.38
8.2.170.0180.00022.96
8.2.160.0040.01122.21
8.2.150.0050.00324.18
8.2.140.0070.00024.66
8.2.130.0030.00619.36
8.2.120.0000.00726.35
8.2.110.0000.01222.08
8.2.100.0040.00818.04
8.2.90.0040.00419.25
8.2.80.0000.00817.97
8.2.70.0060.00317.75
8.2.60.0030.00617.80
8.2.50.0060.00318.07
8.2.40.0000.00819.41
8.2.30.0050.00220.73
8.2.20.0060.00317.85
8.2.10.0030.00518.12
8.2.00.0030.00518.17
8.1.270.0040.00422.19
8.1.260.0040.00428.09
8.1.250.0020.00528.09
8.1.240.0060.00322.34
8.1.230.0040.00817.79
8.1.220.0000.00817.79
8.1.210.0060.00318.77
8.1.200.0030.00617.47
8.1.190.0040.00417.35
8.1.180.0040.00418.10
8.1.170.0000.00818.59
8.1.160.0000.00921.93
8.1.150.0030.00518.93
8.1.140.0040.00419.57
8.1.130.0070.00017.70
8.1.120.0000.00817.43
8.1.110.0040.00417.46
8.1.100.0000.00817.42
8.1.90.0070.00017.43
8.1.80.0000.00717.51
8.1.70.0000.00717.44
8.1.60.0090.00017.61
8.1.50.0040.00417.49
8.1.40.0090.00017.54
8.1.30.0080.00017.72
8.1.20.0040.00417.61
8.1.10.0050.00217.51
8.1.00.0040.00417.50
8.0.300.0000.00718.77
8.0.290.0000.00716.75
8.0.280.0030.00318.45
8.0.270.0030.00317.33
8.0.260.0000.00617.13
8.0.250.0070.00016.99
8.0.240.0000.00617.07
8.0.230.0000.00716.98
8.0.220.0020.00516.83
8.0.210.0000.00717.00
8.0.200.0060.00016.98
8.0.190.0040.00416.89
8.0.180.0070.00016.98
8.0.170.0000.00817.04
8.0.160.0000.00716.95
8.0.150.0000.00716.98
8.0.140.0000.00916.91
8.0.130.0000.00613.42
8.0.120.0060.00316.86
8.0.110.0080.00017.02
8.0.100.0040.00416.80
8.0.90.0000.00716.73
8.0.80.0000.01616.97
8.0.70.0040.00416.84
8.0.60.0040.00416.84
8.0.50.0040.00416.77
8.0.30.0030.01517.20
8.0.20.0140.00517.42
8.0.10.0070.00017.06
8.0.00.0050.01416.73
7.4.330.0060.00016.79
7.4.320.0030.00316.55
7.4.300.0040.00416.64
7.4.290.0040.00416.62
7.4.280.0000.00716.54
7.4.270.0050.00316.62
7.4.260.0000.00816.41
7.4.250.0000.00716.43
7.4.240.0040.00416.56
7.4.230.0000.00816.58
7.4.220.0090.01216.43
7.4.210.0090.00816.54
7.4.200.0030.00316.34
7.4.160.0110.01116.55
7.4.150.0070.01017.40
7.4.140.0120.01117.86
7.4.130.0040.01216.60
7.4.120.0180.00516.50
7.4.110.0060.01216.43
7.4.100.0180.00016.54
7.4.90.0120.00616.54
7.4.80.0130.00319.39
7.4.70.0130.00616.61
7.4.60.0130.00616.55
7.4.50.0070.01016.47
7.4.40.0140.00716.40
7.4.30.0110.00716.63
7.4.10.0100.00714.91
7.4.00.0060.00814.87
7.3.330.0060.00013.43
7.3.320.0060.00013.44
7.3.310.0000.00716.44
7.3.300.0030.00316.48
7.3.290.0030.00316.37
7.3.280.0070.00816.41
7.3.270.0060.01217.40
7.3.260.0100.00716.68
7.3.250.0100.00816.35
7.3.240.0140.00716.28
7.3.230.0060.01216.55
7.3.210.0070.01416.50
7.3.200.0190.00316.52
7.3.190.0060.00916.36
7.3.180.0030.01516.57
7.3.170.0120.00616.49
7.3.160.0000.01616.32
7.3.130.0000.01714.92
7.3.120.0100.00314.67
7.3.110.0090.00914.85
7.3.100.0000.01414.90
7.3.90.0100.00714.67
7.3.80.0060.00614.86
7.3.70.0060.00614.67
7.3.60.0060.00814.61
7.3.50.0070.00314.93
7.3.40.0040.01214.94
7.3.30.0070.00714.92
7.3.20.0080.00316.83
7.3.10.0060.00916.84
7.3.00.0150.00316.75
7.2.330.0120.00616.79
7.2.320.0150.00316.64
7.2.310.0070.01416.78
7.2.300.0110.00816.80
7.2.290.0170.00616.79
7.2.260.0040.01215.15
7.2.250.0070.01015.04
7.2.240.0110.00314.99
7.2.230.0060.01015.02
7.2.220.0030.01015.02
7.2.210.0050.00515.02
7.2.200.0040.00815.28
7.2.190.0140.00015.04
7.2.180.0030.00914.91
7.2.170.0000.01515.06
7.2.160.0000.01614.93
7.2.150.0120.00316.78
7.2.140.0090.00317.14
7.2.130.0030.01017.11
7.2.120.0130.00617.00
7.2.110.0120.00017.04
7.2.100.0040.01116.71
7.2.90.0030.01017.02
7.2.80.0030.00617.01
7.2.70.0040.01116.89
7.2.60.0050.00816.91
7.2.50.0030.01016.70
7.2.40.0000.01317.12
7.2.30.0040.00816.92
7.2.20.0000.01516.92
7.2.10.0000.01116.95
7.2.00.0030.01118.09
7.1.330.0070.00715.82
7.1.320.0120.00315.75
7.1.310.0060.00915.60
7.1.300.0040.00815.77
7.1.290.0070.00715.52
7.1.280.0080.00315.54
7.1.270.0060.00615.73
7.1.260.0070.00415.60
7.1.250.0000.01715.88
7.1.240.0030.01015.79
7.1.230.0040.00815.70
7.1.220.0090.00615.84
7.1.210.0120.00315.77
7.1.200.0030.00715.87
7.1.190.0070.01015.99
7.1.180.0030.00615.86
7.1.170.0060.00915.59
7.1.160.0070.00715.76
7.1.150.0040.00815.74
7.1.140.0050.00515.93
7.1.130.0080.00415.86
7.1.120.0000.01215.54
7.1.110.0070.01015.58
7.1.100.0050.01017.01
7.1.90.0040.01415.80
7.1.80.0030.00915.75
7.1.70.0030.00616.26
7.1.60.0080.01017.60
7.1.50.0120.01025.39
7.1.40.0110.00315.79
7.1.30.0100.00315.57
7.1.20.0060.00915.70
7.1.10.0070.00715.72
7.1.00.0060.03919.15
7.0.330.0000.01615.49
7.0.320.0000.01515.42
7.0.310.0040.00815.23
7.0.300.0060.00615.52
7.0.290.0060.00915.40
7.0.280.0060.00615.43
7.0.270.0120.00415.27
7.0.260.0070.00415.50
7.0.250.0100.00015.47
7.0.240.0100.00315.48
7.0.230.0000.00915.32
7.0.220.0080.00315.23
7.0.210.0040.01115.45
7.0.200.1650.00315.16
7.0.190.0050.00315.59
7.0.180.0000.01215.47
7.0.170.0090.00615.33
7.0.160.0040.01115.39
7.0.150.0090.00615.31
7.0.140.0040.00415.33
7.0.130.0070.00715.52
7.0.120.0040.00815.39
7.0.110.0040.00415.35
7.0.100.0000.00915.13
7.0.90.0060.00615.29
7.0.80.0070.00715.65
7.0.70.0100.00315.59
7.0.60.0050.02517.72
7.0.50.0060.03916.61
7.0.40.0050.02616.76
7.0.30.0080.03216.73
7.0.20.0120.02516.79
7.0.10.0060.04816.88
7.0.00.0050.04816.63
5.6.400.0030.01314.69
5.6.390.0060.00614.46
5.6.380.0040.01114.36
5.6.370.0100.00314.36
5.6.360.0100.00313.98
5.6.350.0100.00314.44
5.6.340.0040.01114.02
5.6.330.0000.01514.53
5.6.320.0070.00714.57
5.6.310.0030.01014.38
5.6.300.0060.00914.67
5.6.290.0060.00314.74
5.6.280.0030.04017.82
5.6.270.0040.01114.72
5.6.260.0050.00514.35
5.6.250.0030.01014.48
5.6.240.0070.00714.25
5.6.230.0040.01114.45
5.6.220.0030.01014.44
5.6.210.0040.02917.47
5.6.200.0100.02616.28
5.6.190.0100.04117.32
5.6.180.0270.03217.37
5.6.170.0120.02517.44
5.6.160.0090.03917.59
5.6.150.0050.04216.27
5.6.140.0050.04616.34
5.6.130.0030.03316.22
5.6.120.0030.05117.71
5.6.110.0080.02217.61
5.6.100.0020.04717.78
5.6.90.0110.04117.63
5.6.80.0120.03817.39
5.6.70.0000.01514.39
5.6.60.0060.00614.31
5.6.50.0090.00614.50
5.6.40.0070.00714.14
5.6.30.0030.00614.47
5.6.20.0000.01414.57
5.6.10.0080.00314.50
5.6.00.0060.00614.25
5.5.380.0070.00314.63
5.5.370.0060.00614.19
5.5.360.0070.00714.16
5.5.350.1610.02017.40
5.5.340.0060.04116.21
5.5.330.0080.04217.27
5.5.320.0160.04317.24
5.5.310.0180.04017.20
5.5.300.0060.04116.12
5.5.290.0070.02515.95
5.5.280.0020.02717.65
5.5.270.0070.02317.58
5.5.260.0130.04117.50
5.5.250.0180.03417.56
5.5.240.0190.03717.32
5.5.230.0040.01114.02
5.5.220.0030.00613.95
5.5.210.0090.00614.22
5.5.200.0090.00014.12
5.5.190.0080.00314.06
5.5.180.0040.00714.30
5.5.170.0000.01114.49
5.5.160.0030.00914.21
5.5.150.0030.00814.39
5.5.140.0080.00014.29
5.5.130.0090.00614.11
5.5.120.0040.00713.86
5.5.110.0050.01114.44
5.5.100.0070.00714.36
5.5.90.0060.00914.45
5.5.80.0030.01514.11
5.5.70.0030.00914.40
5.5.60.0100.00714.01
5.5.50.0040.00814.02
5.5.40.0040.00414.20
5.5.30.0110.00413.93
5.5.20.0120.00314.17
5.5.10.0130.00314.36
5.5.00.0120.00314.37

preferences:
51.9 ms | 400 KiB | 5 Q