3v4l.org

run code in 300+ PHP versions simultaneously
<?php session_start(); function foo() { $t = '_SESSION'; $a = $$t; // not work $b = ${'_SESSION'}; // works var_dump($a, $b); } 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)
8.3.60.0070.00716.75
8.3.50.0090.00922.06
8.3.40.0040.01118.71
8.3.30.0070.00718.92
8.3.20.0060.00320.20
8.3.10.0080.00023.61
8.3.00.0000.00819.25
8.2.180.0110.00416.88
8.2.170.0110.00422.96
8.2.160.0120.00620.26
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0110.00426.16
8.2.120.0090.00022.19
8.2.110.0070.00322.33
8.2.100.0080.00417.78
8.2.90.0000.00819.28
8.2.80.0000.00817.97
8.2.70.0030.00617.50
8.2.60.0080.00017.93
8.2.50.0080.00018.07
8.2.40.0040.00418.22
8.2.30.0030.00617.96
8.2.20.0040.00417.76
8.2.10.0000.00718.20
8.2.00.0000.00817.68
8.1.280.0060.01325.92
8.1.270.0080.00021.97
8.1.260.0000.00826.35
8.1.250.0070.00028.09
8.1.240.0060.00320.39
8.1.230.0090.00317.51
8.1.220.0030.00617.76
8.1.210.0000.00818.77
8.1.200.0040.00417.36
8.1.190.0030.00517.35
8.1.180.0040.00418.10
8.1.170.0070.00718.50
8.1.160.0000.00721.98
8.1.150.0050.00218.78
8.1.140.0050.00317.34
8.1.130.0070.00017.88
8.1.120.0000.00717.47
8.1.110.0050.00317.45
8.1.100.0040.00417.49
8.1.90.0040.00417.47
8.1.80.0070.00017.43
8.1.70.0000.00717.32
8.1.60.0040.00417.68
8.1.50.0080.00017.43
8.1.40.0040.00417.41
8.1.30.0000.00817.69
8.1.20.0000.00717.66
8.1.10.0050.00317.44
8.1.00.0050.00217.25
8.0.300.0080.00018.77
8.0.290.0000.00916.88
8.0.280.0070.00018.50
8.0.270.0000.00717.14
8.0.260.0030.00316.87
8.0.250.0000.00617.04
8.0.240.0030.00317.08
8.0.230.0000.00717.02
8.0.220.0070.00016.90
8.0.210.0000.00717.00
8.0.200.0000.00616.98
8.0.190.0040.00417.11
8.0.180.0000.00716.94
8.0.170.0040.00416.90
8.0.160.0000.00716.82
8.0.150.0040.00417.01
8.0.140.0030.00416.81
8.0.130.0050.00013.46
8.0.120.0080.00016.82
8.0.110.0000.00816.82
8.0.100.0000.00717.00
8.0.90.0070.00016.80
8.0.80.0110.00416.95
8.0.70.0080.00016.76
8.0.60.0070.00016.92
8.0.50.0040.00416.83
8.0.30.0080.01117.00
8.0.20.0100.01017.40
8.0.10.0040.00417.10
8.0.00.0030.01416.76
7.4.330.0000.00615.03
7.4.320.0030.00316.50
7.4.300.0000.00716.48
7.4.290.0000.00716.62
7.4.280.0000.00816.58
7.4.270.0000.00716.53
7.4.260.0020.00516.57
7.4.250.0030.00316.60
7.4.240.0020.00516.52
7.4.230.0060.00316.63
7.4.220.0170.01016.54
7.4.210.0100.00616.56
7.4.200.0000.00716.72
7.4.190.0000.00716.71
7.4.160.0130.00916.76
7.4.150.0120.00617.40
7.4.140.0150.00617.86
7.4.130.0090.00816.65
7.4.120.0050.01416.54
7.4.110.0200.00016.69
7.4.100.0100.00716.67
7.4.90.0070.01016.50
7.4.80.0040.01419.39
7.4.70.0050.01116.46
7.4.60.0030.01316.65
7.4.50.0040.00416.40
7.4.40.0070.00422.77
7.4.30.0080.00816.58
7.4.10.0120.00615.00
7.4.00.0070.01015.17
7.3.330.0000.00513.43
7.3.320.0000.00813.32
7.3.310.0030.00316.39
7.3.300.0040.00416.33
7.3.290.0130.00316.45
7.3.280.0120.00816.35
7.3.270.0130.01017.40
7.3.260.0160.00916.50
7.3.250.0080.00916.60
7.3.240.0130.01016.38
7.3.230.0130.01016.65
7.3.210.0090.00916.64
7.3.200.0070.01119.39
7.3.190.0130.01016.53
7.3.180.0090.00616.62
7.3.170.0070.01016.49
7.3.160.0060.01016.33
7.3.130.0030.01414.93
7.3.120.0060.00914.73
7.3.110.0090.00615.10
7.3.100.0080.00814.81
7.3.90.0110.00315.02
7.3.80.0000.01014.70
7.3.70.0070.00714.83
7.3.60.0080.00814.96
7.3.50.0060.00914.88
7.3.40.0140.00014.94
7.3.30.0030.01314.78
7.3.20.0130.00316.54
7.3.10.0030.00916.54
7.3.00.0070.00616.76
7.2.330.0100.00716.53
7.2.320.0030.01416.36
7.2.310.0120.00616.27
7.2.300.0030.01216.50
7.2.290.0100.01016.71
7.2.260.0070.01014.79
7.2.250.0090.01015.22
7.2.240.0030.01014.97
7.2.230.0030.01615.24
7.2.220.0000.01514.76
7.2.210.0070.00715.27
7.2.200.0030.01315.16
7.2.190.0090.00614.71
7.2.180.0060.01015.04
7.2.170.0070.01314.94
7.2.160.0090.00914.93
7.2.150.0030.00916.83
7.2.140.0070.00716.80
7.2.130.0090.00316.95
7.2.120.0090.00616.97
7.2.110.0090.00016.80
7.2.100.0070.00416.75
7.2.90.0070.00316.59
7.2.80.0070.00316.80
7.2.70.0030.00916.76
7.2.60.0060.00616.65
7.2.50.0030.00916.71
7.2.40.0100.00016.73
7.2.30.0060.01017.00
7.2.20.0090.00616.63
7.2.10.0060.00616.73
7.2.00.0070.00617.95
7.1.330.0060.00615.52
7.1.320.0070.00715.95
7.1.310.0000.01415.61
7.1.300.0110.00415.83
7.1.290.0070.00715.88
7.1.280.0070.01015.89
7.1.270.0080.00415.97
7.1.260.0100.00315.89
7.1.250.0080.00815.72
7.1.240.0090.00415.88
7.1.230.0040.00715.91
7.1.220.0000.01115.73
7.1.210.0060.00915.62
7.1.200.0060.00315.83
7.1.190.0040.00715.81
7.1.180.0080.00415.81
7.1.170.0040.00815.84
7.1.160.0030.00915.87
7.1.150.0100.00315.81
7.1.140.0070.00715.59
7.1.130.0050.00515.88
7.1.120.0090.00315.99
7.1.110.0060.00615.88
7.1.100.0020.01116.91
7.1.90.0030.01315.57
7.1.80.0080.00315.79
7.1.70.0040.00816.36
7.1.60.0070.01217.51
7.1.50.0120.00925.27
7.1.40.0110.00415.42
7.1.30.0000.00915.59
7.1.20.0070.00415.78
7.1.10.0060.00615.79
7.1.00.0020.04519.16
7.0.330.0030.00915.30
7.0.320.0000.01315.41
7.0.310.0080.00415.50
7.0.300.0070.00715.55
7.0.290.0080.00415.38
7.0.280.0040.00815.39
7.0.270.0060.00815.39
7.0.260.0110.00415.39
7.0.250.0030.00715.39
7.0.240.0070.01015.29
7.0.230.0040.01115.21
7.0.220.0040.01115.23
7.0.210.0040.00815.52
7.0.200.0070.00716.11
7.0.190.0060.01015.34
7.0.180.0030.01015.21
7.0.170.0040.00415.57
7.0.160.0000.00915.22
7.0.150.0000.01515.17
7.0.140.0050.03618.63
7.0.130.0080.00015.52
7.0.120.0070.00315.53
7.0.110.0040.01115.55
7.0.100.0300.04317.76
7.0.90.0300.04317.72
7.0.80.0280.03417.71
7.0.70.0360.03217.62
7.0.60.0270.04317.64
7.0.50.0230.04917.76
7.0.40.0100.04016.86
7.0.30.0110.03816.82
7.0.20.0030.03116.68
7.0.10.0070.04516.77
7.0.00.0070.04716.73
5.6.400.0110.00414.12
5.6.390.0070.00713.86
5.6.380.0030.01013.95
5.6.370.0040.01113.88
5.6.360.0110.00414.00
5.6.350.0050.00314.20
5.6.340.0030.00714.00
5.6.330.0030.01014.23
5.6.320.0100.00314.21
5.6.310.0040.00714.00
5.6.300.0000.01114.23
5.6.290.0060.00314.14
5.6.280.0070.00714.41
5.6.270.0000.01514.18
5.6.260.0100.00714.22
5.6.250.0070.04217.34
5.6.240.0100.04217.50
5.6.230.0020.04617.37
5.6.220.0150.02317.44
5.6.210.0100.02717.29
5.6.200.0120.03717.72
5.6.190.0050.04517.72
5.6.180.0020.03617.59
5.6.170.0030.04017.51
5.6.160.0100.04217.49
5.6.150.0050.04517.73
5.6.140.0050.02817.70
5.6.130.0090.04317.75
5.6.120.0050.04517.67
5.6.110.0130.03717.68
5.6.100.0080.03817.63
5.6.90.0040.04717.56
5.6.80.0050.04517.34
5.6.70.0170.03617.33
5.6.60.0050.04317.37
5.6.50.0020.04817.30
5.6.40.0070.03817.29
5.6.30.0050.02717.24
5.6.20.0140.01817.25
5.6.10.0070.02217.19
5.6.00.0100.02217.20
5.5.380.0090.04017.40
5.5.370.0130.03717.23
5.5.360.0070.03517.17
5.5.350.0050.02917.42
5.5.340.0130.03817.46
5.5.330.0070.03517.69
5.5.320.0030.04617.53
5.5.310.0100.04117.34
5.5.300.0060.04617.56
5.5.290.0030.04217.48
5.5.280.0080.04517.54
5.5.270.0050.04217.42
5.5.260.0050.04417.45
5.5.250.0050.04517.41
5.5.240.0110.03017.15
5.5.230.0070.04317.22
5.5.220.0020.04717.02
5.5.210.0060.03817.18
5.5.200.0090.03817.01
5.5.190.0060.02317.16
5.5.180.0040.02617.19
5.5.170.0070.00713.93
5.5.160.0050.02517.25
5.5.150.0070.02817.00
5.5.140.0030.02317.15
5.5.130.0090.01617.15
5.5.120.0080.02517.19
5.5.110.0050.02217.12
5.5.100.0080.02217.01
5.5.90.0030.02817.07
5.5.80.0020.02517.08
5.5.70.0070.02217.07
5.5.60.0050.04617.08
5.5.50.0110.03516.90
5.5.40.0080.02817.13
5.5.30.0030.02317.04
5.5.20.0040.02416.87
5.5.10.0070.02317.13
5.5.00.0050.02416.79
5.4.450.0050.04615.51
5.4.440.0100.03715.64
5.4.430.0080.04015.58
5.4.420.0070.03715.68
5.4.410.0070.02415.51
5.4.400.0100.03615.48
5.4.390.0100.03815.48
5.4.380.0030.04215.46
5.4.370.0050.04115.46
5.4.360.0080.03815.33
5.4.350.0060.03615.47
5.4.340.0030.03315.51
5.4.330.0040.00811.80
5.4.320.0080.02315.34
5.4.310.0060.02115.52
5.4.300.0020.02415.37
5.4.290.0020.02415.46
5.4.280.0040.02015.48
5.4.270.0070.01815.35
5.4.260.0070.01915.47
5.4.250.0000.03215.47
5.4.240.0020.02115.41
5.4.230.0060.01815.46
5.4.220.0030.03615.38
5.4.210.0050.03515.33
5.4.200.0020.02315.49
5.4.190.0070.01815.46
5.4.180.0020.02315.41
5.4.170.0050.02315.51
5.4.160.0120.01215.33
5.4.150.0020.03715.45
5.4.140.0060.02014.12
5.4.130.0100.01714.11
5.4.120.0030.02314.11
5.4.110.0040.02014.11
5.4.100.0060.01814.15
5.4.90.0050.02014.09
5.4.80.0020.02514.13
5.4.70.0030.03814.13
5.4.60.0030.02314.08
5.4.50.0020.01914.05
5.4.40.0050.02214.17
5.4.30.0060.03114.05
5.4.20.0020.02114.18
5.4.10.0070.01814.11
5.4.00.0060.02113.85
5.3.290.0070.02513.27
5.3.280.0020.03513.25
5.3.270.0050.03313.25
5.3.260.0060.02813.21
5.3.250.0040.01813.23
5.3.240.0050.02113.17
5.3.230.0020.02813.26
5.3.220.0080.01813.16
5.3.210.0030.02013.16
5.3.200.0020.02313.19
5.3.190.0050.02813.21
5.3.180.0030.02113.15
5.3.170.0080.02013.25
5.3.160.0030.02013.15
5.3.150.0030.02213.16
5.3.140.0060.03313.23
5.3.130.0040.02113.16
5.3.120.0070.02713.13
5.3.110.0030.02213.16
5.3.100.0030.03312.90
5.3.90.0030.02012.92
5.3.80.0050.02712.97
5.3.70.0070.01812.96
5.3.60.0030.04012.96
5.3.50.0030.03812.92
5.3.40.0050.03312.85
5.3.30.0080.03812.90
5.3.20.0020.04212.80
5.3.10.0080.03512.74
5.3.00.0070.03212.71
5.2.170.0070.05711.47
5.2.160.0070.06011.47
5.2.150.0070.06011.47
5.2.140.0070.06311.47
5.2.130.0070.05711.47
5.2.120.0030.03711.47
5.2.110.0030.06311.47
5.2.100.0030.06311.47
5.2.90.0030.04011.47
5.2.80.0030.05011.47
5.2.70.0130.05311.47
5.2.60.0100.03311.47
5.2.50.0130.05711.47
5.2.40.0030.03711.47
5.2.30.0100.05311.47
5.2.20.0000.05011.47
5.2.10.0070.06011.47
5.2.00.0000.04311.47
5.1.60.0070.05011.47
5.1.50.0030.05711.47
5.1.40.0070.04711.47
5.1.30.0030.05711.47
5.1.20.0130.04711.47
5.1.10.0030.05011.47
5.1.00.0000.03311.47
5.0.50.0030.04711.47
5.0.40.0030.05011.47
5.0.30.0000.06711.47
5.0.20.0000.02311.47
5.0.10.0030.03011.47
5.0.00.0000.05711.47
4.4.90.0070.03011.47
4.4.80.0030.01311.47
4.4.70.0070.03311.47
4.4.60.0000.02711.47
4.4.50.0030.02311.47
4.4.40.0000.05711.47
4.4.30.0030.03311.47
4.4.20.0000.03711.47
4.4.10.0030.03711.47
4.4.00.0030.05711.47
4.3.110.0030.03311.47
4.3.100.0030.03011.47
4.3.90.0000.03011.47
4.3.80.0000.05711.47
4.3.70.0030.03011.47
4.3.60.0100.02711.47
4.3.50.0000.03711.47
4.3.40.0000.04311.47
4.3.30.0030.03311.47
4.3.20.0000.04011.47
4.3.10.0030.03311.47
4.3.00.0000.03011.47

preferences:
42.68 ms | 401 KiB | 5 Q