3v4l.org

run code in 300+ PHP versions simultaneously
<?php class foo { function __construct() { $this->a = "hello"; $this->b = "hi"; $this->val = "howdy"; $val = "a"; echo $this->{$val}; // outputs "hello" echo "\n"; $val = "b"; echo $this->{$val}; // outputs "hi" echo "\n"; echo $this->val; //outputs "howdy" echo "\n"; echo $this->{"val"}; } function __construct2() { echo $this->{$val}; // outputs "hello" } } $foo = new foo();

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)
8.3.40.0170.00018.93
8.3.30.0120.00318.71
8.3.20.0080.00018.90
8.3.10.0080.00021.14
8.3.00.0040.00421.88
8.2.170.0070.00722.96
8.2.160.0070.00720.52
8.2.150.0070.00024.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00421.10
8.2.110.0090.00020.53
8.2.100.0040.00817.75
8.2.90.0050.00319.00
8.2.80.0030.00517.97
8.2.70.0040.00817.38
8.2.60.0070.00517.93
8.2.50.0040.00418.07
8.2.40.0000.00918.09
8.2.30.0030.00619.89
8.2.20.0040.00417.54
8.2.10.0060.00317.81
8.2.00.0000.00817.79
8.1.270.0080.00023.99
8.1.260.0070.00726.35
8.1.250.0080.00028.09
8.1.240.0060.00322.55
8.1.230.0110.00021.09
8.1.220.0040.00418.77
8.1.210.0050.00318.87
8.1.200.0000.00817.35
8.1.190.0040.00417.65
8.1.180.0030.00518.10
8.1.170.0000.00818.50
8.1.160.0040.00418.80
8.1.150.0070.00018.57
8.1.140.0040.00417.40
8.1.130.0030.00317.76
8.1.120.0000.00717.51
8.1.110.0040.00417.30
8.1.100.0040.00417.38
8.1.90.0030.00317.35
8.1.80.0000.00717.39
8.1.70.0070.00017.43
8.1.60.0020.00517.59
8.1.50.0070.00017.42
8.1.40.0000.00817.43
8.1.30.0040.00417.56
8.1.20.0040.00417.63
8.1.10.0080.00017.49
8.1.00.0070.00317.52
8.0.300.0070.00020.03
8.0.290.0060.00317.18
8.0.280.0040.00418.35
8.0.270.0030.00316.87
8.0.260.0000.00616.78
8.0.250.0050.00316.89
8.0.240.0070.00317.01
8.0.230.0000.00716.94
8.0.220.0040.00416.92
8.0.210.0070.00016.93
8.0.200.0070.00016.89
8.0.190.0070.00016.88
8.0.180.0050.00516.77
8.0.170.0040.00416.91
8.0.160.0080.00016.82
8.0.150.0050.00216.82
8.0.140.0000.00816.86
8.0.130.0000.00613.30
8.0.120.0050.00316.83
8.0.110.0040.00416.77
8.0.100.0070.00016.78
8.0.90.0000.00716.95
8.0.80.0150.00016.89
8.0.70.0040.00416.72
8.0.60.0040.00416.67
8.0.50.0040.00416.77
8.0.30.0110.01317.13
8.0.20.0110.00717.40
8.0.10.0000.00817.03
8.0.00.0140.00616.79
7.4.330.0030.00314.71
7.4.320.0000.00616.54
7.4.300.0060.00016.48
7.4.290.0070.00016.49
7.4.280.0000.00716.49
7.4.270.0030.00316.66
7.4.260.0030.00313.23
7.4.250.0040.00416.58
7.4.240.0000.00716.65
7.4.230.0060.00016.71
7.4.220.0030.01916.64
7.4.210.0050.00916.55
7.4.200.0040.00416.60
7.4.190.0030.00316.65
7.4.160.0130.00316.45
7.4.150.0090.00917.40
7.4.140.0140.00817.86
7.4.130.0090.00916.46
7.4.120.0070.01016.46
7.4.110.0070.01016.42
7.4.100.0150.00316.55
7.4.90.0070.01016.34
7.4.80.0070.01319.37
7.4.70.0110.01116.39
7.4.60.0090.01316.46
7.4.50.0030.00616.61
7.4.40.0100.00622.27
7.4.30.0170.00016.43
7.4.00.0060.01114.98
7.3.330.0030.00313.33
7.3.320.0000.00713.38
7.3.310.0000.00816.18
7.3.300.0000.00716.21
7.3.290.0070.00716.39
7.3.280.0070.00816.37
7.3.270.0030.01417.40
7.3.260.0100.00818.24
7.3.250.0060.01716.46
7.3.240.0070.01016.37
7.3.230.0120.00416.54
7.3.210.0100.00716.31
7.3.200.0140.00519.39
7.3.190.0040.01216.65
7.3.180.0120.00916.37
7.3.170.0080.00816.32
7.3.160.0030.01216.48
7.3.120.0070.00614.77
7.3.110.0030.01615.14
7.3.100.0070.00714.70
7.3.90.0070.00714.91
7.3.80.0060.00914.93
7.3.70.0090.00914.76
7.3.60.0000.01714.96
7.3.50.0080.00414.79
7.3.40.0000.01514.73
7.3.30.0040.01114.79
7.3.20.0080.00616.68
7.3.10.0070.00316.57
7.3.00.0000.01416.74
7.2.330.0090.00916.66
7.2.320.0110.00716.74
7.2.310.0060.01216.77
7.2.300.0060.01116.68
7.2.290.0000.01616.68
7.2.250.0060.01515.30
7.2.240.0130.00615.24
7.2.230.0090.00614.77
7.2.220.0000.01315.17
7.2.210.0100.00315.16
7.2.200.0040.00815.20
7.2.190.0090.00915.08
7.2.180.0080.00415.21
7.2.170.0000.01515.13
7.2.60.0040.01216.89
7.2.00.0110.00319.54
7.1.330.0090.00615.73
7.1.320.0060.00615.96
7.1.310.0130.00315.54
7.1.300.0040.00815.81
7.1.290.0030.01015.82
7.1.280.0000.01015.68
7.1.270.0000.01015.72
7.1.260.0120.00015.51
7.1.200.0080.00615.63
7.1.100.0090.00318.14
7.1.70.0000.00817.12
7.1.60.0040.00817.13
7.1.50.0070.01016.92
7.1.00.0000.03722.48
7.0.200.0030.01316.46
7.0.140.0000.07722.00
7.0.60.0030.04019.91
7.0.50.0100.07017.84
7.0.40.0030.07720.40
7.0.30.0570.06720.08
7.0.20.0330.06320.08
7.0.10.0130.04320.14
7.0.00.0070.07720.35
5.6.280.0030.06721.04
5.6.210.0170.06320.55
5.6.200.0070.08718.25
5.6.190.0130.04320.76
5.6.180.0330.03720.52
5.6.170.0230.06020.44
5.6.160.0100.07020.61
5.6.150.0030.04018.12
5.6.140.0100.07318.27
5.6.130.0000.04718.28
5.6.120.0000.04321.00
5.6.110.0030.05021.00
5.6.100.0100.06720.96
5.6.90.0000.08020.96
5.6.80.0130.06720.41
5.6.70.4500.04020.52
5.5.350.0400.06320.50
5.5.340.0000.05718.01
5.5.330.0100.03320.18
5.5.320.0030.08320.28
5.5.310.0300.07320.50
5.5.300.0070.07717.95
5.5.290.0130.06717.94
5.5.280.0070.06020.78
5.5.270.0170.08720.87
5.5.260.0000.08720.80
5.5.250.0030.06320.59
5.5.240.0070.07720.07
5.4.450.2000.04719.20
5.4.440.2170.04019.30
5.4.430.2070.04719.16
5.4.420.2100.04019.40
5.4.410.1970.03319.30
5.4.400.0530.04018.98
5.4.390.0070.08018.99
5.4.380.0030.04318.99
5.4.370.0200.08019.14
5.4.360.2000.03719.09
5.4.350.1870.04018.86
5.4.340.2130.04019.02
5.4.320.2130.04718.95
5.4.310.1930.03019.21
5.4.300.1770.04319.16
5.4.290.2170.04318.95
5.4.280.2070.03319.22
5.4.270.1870.03718.87
5.4.260.2100.03319.16
5.4.250.1800.03719.21
5.4.240.2100.04319.23
5.4.230.1870.03718.94
5.4.220.1970.04019.22
5.4.210.1830.03719.12
5.4.200.2000.04719.30
5.4.190.2270.04319.21
5.4.180.2200.04319.04
5.4.170.2000.03719.21
5.4.160.2100.04319.19
5.4.150.1930.03019.13
5.4.140.2200.04016.52
5.4.130.2000.03716.38
5.4.120.2030.04016.34
5.4.110.1900.03716.40
5.4.100.1770.03716.25
5.4.90.2100.03716.54
5.4.80.1930.03316.43
5.4.70.2300.03716.31
5.4.60.2070.04016.40
5.4.50.1900.03716.33
5.4.40.2170.02716.17
5.4.30.2400.04016.52
5.4.20.2270.03016.37
5.4.10.2230.03016.43
5.4.00.0030.07315.82
5.3.290.0070.05714.89
5.3.280.0100.04714.55
5.3.270.1130.04714.83
5.3.260.2330.04014.69
5.3.250.2070.04014.66
5.3.240.2300.04314.60
5.3.230.2100.04014.50
5.3.220.2400.04314.54
5.3.210.2370.03714.57
5.3.200.2000.04714.64
5.3.190.1930.04714.49
5.3.180.1730.03714.65
5.3.170.2100.03014.62
5.3.160.1900.04014.71
5.3.150.1800.03314.62
5.3.140.1830.03014.61
5.3.130.2000.04014.45
5.3.120.1970.03714.54
5.3.110.1930.05314.47
5.3.100.1970.04714.09
5.3.90.1730.03714.03
5.3.80.1970.02714.00
5.3.70.1930.03714.04
5.3.60.2100.03313.92
5.3.50.1870.03013.97
5.3.40.1930.03713.87
5.3.30.1770.03714.00
5.3.20.1800.03313.60
5.3.10.1830.03013.74
5.3.00.1970.03313.57
5.2.170.1730.03011.06
5.2.160.1530.03011.08
5.2.150.1770.03711.06
5.2.140.1630.03011.27
5.2.130.1530.03011.01
5.2.120.1570.02311.02
5.2.110.1430.03311.05
5.2.100.1700.03311.02
5.2.90.1500.03011.12
5.2.80.1530.03311.11
5.2.70.1570.02311.17
5.2.60.1500.03011.13
5.2.50.1500.03010.94
5.2.40.1500.03311.07
5.2.30.1270.02711.12
5.2.20.1230.03010.86
5.2.10.1270.03010.94
5.2.00.1270.03310.64
5.1.60.1200.02710.06
5.1.50.1270.02310.00
5.1.40.1230.0209.96
5.1.30.1230.02310.27
5.1.20.1230.02310.31
5.1.10.1300.01710.16
5.1.00.1230.0239.97
5.0.50.0800.0208.48
5.0.40.0730.0208.42
5.0.30.0800.0508.28
5.0.20.0600.0208.14
5.0.10.0570.0238.08
5.0.00.0670.0378.09
4.4.90.0670.0137.95
4.4.80.0700.0207.95
4.4.70.0670.0137.95
4.4.60.0630.0177.95
4.4.50.0600.0137.95
4.4.40.0600.0237.95
4.4.30.0600.0137.95
4.4.20.0730.0237.95
4.4.10.0570.0177.95
4.4.00.0570.0277.95
4.3.110.0730.0177.95
4.3.100.0800.0177.95
4.3.90.0600.0177.95
4.3.80.0630.0177.95
4.3.70.0800.0207.95
4.3.60.0600.0137.95
4.3.50.0670.0137.95
4.3.40.0670.0307.95
4.3.30.0300.0177.95
4.3.20.0400.0277.95
4.3.10.0370.0277.95
4.3.00.0370.0137.95

preferences:
31.92 ms | 400 KiB | 5 Q