3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'b'; $b = 'c'; $c = 'a'; echo $$$$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)
8.3.70.0120.00616.50
8.3.60.0070.00718.43
8.3.50.0130.00521.88
8.3.40.0150.00318.67
8.3.30.0040.01518.91
8.3.20.0040.00420.17
8.3.10.0040.00421.73
8.3.00.0040.00419.54
8.2.190.0120.00316.58
8.2.180.0150.00618.26
8.2.170.0070.00722.96
8.2.160.0100.00319.05
8.2.150.0000.00824.18
8.2.140.0000.00824.66
8.2.130.0070.00026.16
8.2.120.0040.00420.60
8.2.110.0040.00422.25
8.2.100.0060.00617.78
8.2.90.0080.00019.05
8.2.80.0070.00317.97
8.2.70.0040.00817.50
8.2.60.0000.00818.05
8.2.50.0000.00818.07
8.2.40.0060.00318.03
8.2.30.0000.00718.04
8.2.20.0000.00817.54
8.2.10.0070.00017.95
8.2.00.0000.00817.69
8.1.280.0070.01025.92
8.1.270.0050.00322.05
8.1.260.0030.00526.35
8.1.250.0040.00428.09
8.1.240.0030.00623.66
8.1.230.0080.00418.88
8.1.220.0000.00717.78
8.1.210.0050.00318.77
8.1.200.0030.00617.35
8.1.190.0040.00417.41
8.1.180.0000.00818.10
8.1.170.0040.00418.70
8.1.160.0050.00222.00
8.1.150.0000.00718.79
8.1.140.0000.00717.44
8.1.130.0000.00717.73
8.1.120.0040.00417.41
8.1.110.0070.00017.46
8.1.100.0000.00717.34
8.1.90.0040.00417.43
8.1.80.0070.00017.45
8.1.70.0000.00817.39
8.1.60.0050.00517.46
8.1.50.0000.00917.49
8.1.40.0000.00717.56
8.1.30.0040.00417.48
8.1.20.0000.00717.52
8.1.10.0020.00517.41
8.1.00.0060.00317.32
8.0.300.0070.00018.77
8.0.290.0070.00017.18
8.0.280.0030.00318.36
8.0.270.0000.00716.80
8.0.260.0060.00017.15
8.0.250.0030.00316.94
8.0.240.0030.00316.89
8.0.230.0030.00316.93
8.0.220.0000.00716.77
8.0.210.0030.00316.89
8.0.200.0030.00316.95
8.0.190.0030.00616.84
8.0.180.0040.00416.91
8.0.170.0000.00916.79
8.0.160.0000.00716.94
8.0.150.0030.00316.79
8.0.140.0030.00616.72
8.0.130.0030.00513.34
8.0.120.0000.00816.71
8.0.110.0070.00016.90
8.0.100.0060.00316.95
8.0.90.0070.00016.92
8.0.80.0140.00716.86
8.0.70.0050.00316.77
8.0.60.0050.00216.69
8.0.50.0080.00016.77
8.0.30.0100.01117.09
8.0.20.0080.01017.40
8.0.10.0040.00416.95
8.0.00.0100.01116.75
7.4.330.0000.00615.11
7.4.320.0030.00316.63
7.4.300.0030.00316.50
7.4.290.0060.00316.48
7.4.280.0080.00016.43
7.4.270.0000.00716.57
7.4.260.0040.00216.56
7.4.250.0000.00716.44
7.4.240.0050.00316.53
7.4.230.0040.00416.68
7.4.220.0060.00916.59
7.4.210.0060.00816.65
7.4.200.0070.00016.33
7.4.160.0130.00316.60
7.4.150.0090.00917.40
7.4.140.0090.01217.86
7.4.130.0070.00916.53
7.4.120.0080.00916.45
7.4.110.0080.01116.30
7.4.100.0070.01016.52
7.4.90.0090.01216.32
7.4.80.0080.00819.39
7.4.70.0040.01416.38
7.4.60.0070.01016.33
7.4.50.0000.00616.49
7.4.40.0120.00616.53
7.4.30.0070.01016.33
7.4.00.0070.01114.97
7.3.330.0060.00013.18
7.3.320.0030.00313.06
7.3.310.0070.00016.39
7.3.300.0000.00716.05
7.3.290.0120.00316.23
7.3.280.0080.00916.20
7.3.270.0100.00717.40
7.3.260.0110.00616.49
7.3.250.0050.01216.53
7.3.240.0070.01316.24
7.3.230.0100.00716.39
7.3.210.0100.00716.39
7.3.200.0070.01019.39
7.3.190.0100.00616.60
7.3.180.0090.00616.41
7.3.170.0140.00316.44
7.3.160.0120.00416.38
7.2.330.0060.01116.62
7.2.320.0120.01316.50
7.2.310.0150.00416.45
7.2.300.0120.00616.52
7.2.290.0090.00916.54
7.2.00.0030.01019.18
7.1.100.0060.00618.17
7.1.70.0000.01016.96
7.1.60.0100.01619.29
7.1.50.0210.01434.63
7.1.00.0030.07322.33
7.0.200.0030.00616.46
7.0.140.0030.07322.01
7.0.60.0070.08020.06
7.0.50.0130.05017.79
7.0.40.0130.07720.06
7.0.30.0270.04720.18
7.0.20.0200.08320.13
7.0.10.0000.05320.22
7.0.00.0000.04320.16
5.6.280.0000.07720.99
5.6.210.0070.08020.48
5.6.200.0070.07718.16
5.6.190.0070.08320.57
5.6.180.0430.07720.39
5.6.170.0200.03720.50
5.6.160.0070.05320.52
5.6.150.0100.06718.13
5.6.140.0000.05318.11
5.6.130.0070.08018.18
5.6.120.0030.08021.04
5.6.110.0200.05721.11
5.6.100.0100.07321.13
5.6.90.0100.08021.00
5.6.80.0100.07720.50
5.5.350.0300.07720.35
5.5.340.0070.03717.96
5.5.330.0070.08320.21
5.5.320.0200.07020.22
5.5.310.0130.05720.29
5.5.300.0000.04017.96
5.5.290.0070.04017.97
5.5.280.0130.07320.86
5.5.270.0030.04320.66
5.5.260.0070.07020.86
5.5.250.0000.08720.68
5.5.240.0130.07020.18
5.4.450.1900.03719.21
5.4.440.2100.04719.26
5.4.430.2070.04019.25
5.4.420.2330.04319.38
5.4.410.1870.04318.99
5.4.400.1870.03719.10
5.4.390.2270.04019.24
5.4.380.2100.02719.21
5.4.370.2200.03719.10
5.4.360.1800.03318.81
5.4.350.2000.04319.09
5.4.340.1730.04318.77
5.4.320.2300.03319.06
5.4.310.1870.04019.09
5.4.300.1930.04319.05
5.4.290.2130.04019.12
5.4.280.1870.04019.21
5.4.270.1830.04319.05
5.4.260.1800.04019.21
5.4.250.2000.04319.07
5.4.240.2030.04318.89
5.4.230.1870.05019.05
5.4.220.2070.04719.21
5.4.210.2000.04319.21
5.4.200.2070.04319.16
5.4.190.2000.04018.76
5.4.180.1900.04019.05
5.4.170.2000.04318.88
5.4.160.1970.04019.19
5.4.150.1970.05018.79
5.4.140.2030.04316.39
5.4.130.2000.03716.44
5.4.120.2100.04316.20
5.4.110.2000.04016.06
5.4.100.2070.03316.18
5.4.90.2030.04016.41
5.4.80.1830.03016.42
5.4.70.1800.03316.39
5.4.60.1930.04016.41
5.4.50.1970.04016.28
5.4.40.2070.04016.31
5.4.30.2300.03716.27
5.4.20.1830.03016.04
5.4.10.1770.03316.23
5.4.00.2030.04015.71
5.3.290.1830.03314.61
5.3.280.1830.03714.68
5.3.270.2030.04314.46
5.3.260.2030.03714.46
5.3.250.2200.03314.44
5.3.240.1970.02714.45
5.3.230.1830.03714.45
5.3.220.2200.03714.51
5.3.210.1870.03714.52
5.3.200.1830.03714.51
5.3.190.2100.03714.42
5.3.180.1970.04014.50
5.3.170.2100.04714.46
5.3.160.1900.03314.41
5.3.150.2170.04014.59
5.3.140.2000.04714.41
5.3.130.1900.03014.39
5.3.120.1800.03714.50
5.3.110.1930.02314.48
5.3.100.2030.04013.94
5.3.90.1970.04313.87
5.3.80.2100.04313.84
5.3.70.2070.04013.86
5.3.60.2000.03713.85
5.3.50.2370.03713.77
5.3.40.1870.03313.89
5.3.30.2130.03013.87
5.3.20.1800.03313.48
5.3.10.2100.03713.43
5.3.00.2100.03713.58
5.2.170.1570.02711.15
5.2.160.1800.02710.99
5.2.150.1630.03311.16
5.2.140.1770.03011.17
5.2.130.1700.02710.96
5.2.120.1470.03010.93
5.2.110.1600.01711.10
5.2.100.1730.03010.96
5.2.90.1530.02311.14
5.2.80.1770.03310.92
5.2.70.1670.03711.17
5.2.60.1570.02710.93
5.2.50.1300.02311.06
5.2.40.1230.02310.93
5.2.30.1670.03311.04
5.2.20.1700.03010.90
5.2.10.1470.02710.82
5.2.00.1330.03310.72
5.1.60.1530.02010.03
5.1.50.1800.02710.11
5.1.40.1730.0279.89
5.1.30.1630.02710.49
5.1.20.1430.02710.26
5.1.10.1730.02310.04
5.1.00.1470.02710.04
5.0.50.0530.0378.43
5.0.40.0730.0208.50
5.0.30.0770.0338.06
5.0.20.0700.0208.09
5.0.10.0770.0238.29
5.0.00.0970.0408.15
4.4.90.0970.0207.92
4.4.80.0800.0137.92
4.4.70.0900.0277.92
4.4.60.0800.0177.92
4.4.50.0730.0207.92
4.4.40.1000.0277.92
4.4.30.0970.0207.92
4.4.20.0970.0207.92
4.4.10.0970.0237.92
4.4.00.0970.0377.92
4.3.110.1000.0177.92
4.3.100.0770.0177.92
4.3.90.0930.0207.92
4.3.80.1000.0277.92
4.3.70.0930.0177.92
4.3.60.0970.0207.92
4.3.50.1000.0207.92
4.3.40.0800.0337.92
4.3.30.0470.0277.92
4.3.20.0470.0307.92
4.3.10.0430.0177.92
4.3.00.0430.0177.92

preferences:
67.54 ms | 401 KiB | 5 Q