3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'hello'; $$a = 'world'; echo "$a ${$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)
8.3.60.0140.00718.55
8.3.50.0140.00521.07
8.3.40.0090.00618.67
8.3.30.0070.00718.98
8.3.20.0070.00020.20
8.3.10.0040.00420.57
8.3.00.0160.00319.25
8.2.180.0150.00316.75
8.2.170.0090.00622.96
8.2.160.0060.00920.39
8.2.150.0090.00024.18
8.2.140.0060.00324.66
8.2.130.0080.00026.16
8.2.120.0070.00022.09
8.2.110.0030.00620.53
8.2.100.0120.00017.85
8.2.90.0040.00419.17
8.2.80.0050.00317.97
8.2.70.0080.00017.50
8.2.60.0060.00317.80
8.2.50.0000.00818.07
8.2.40.0040.00418.21
8.2.30.0060.00319.17
8.2.20.0040.00417.81
8.2.10.0000.00717.99
8.2.00.0000.01017.56
8.1.280.0140.00325.92
8.1.270.0060.00322.02
8.1.260.0050.00226.35
8.1.250.0040.00428.09
8.1.240.0060.00323.96
8.1.230.0060.00618.95
8.1.220.0050.00317.77
8.1.210.0000.00818.77
8.1.200.0030.00617.23
8.1.190.0000.00917.23
8.1.180.0040.00418.10
8.1.170.0060.00618.53
8.1.160.0000.00822.07
8.1.150.0020.00518.89
8.1.140.0000.00717.45
8.1.130.0030.00317.73
8.1.120.0040.00317.38
8.1.110.0050.00217.39
8.1.100.0040.00417.46
8.1.90.0030.00517.48
8.1.80.0000.00717.45
8.1.70.0030.00317.45
8.1.60.0090.00017.47
8.1.50.0000.00717.45
8.1.40.0000.00817.50
8.1.30.0050.00317.54
8.1.20.0040.00417.69
8.1.10.0030.00517.54
8.1.00.0000.00817.31
8.0.300.0000.00718.77
8.0.290.0000.00716.63
8.0.280.0070.00018.50
8.0.270.0040.00417.18
8.0.260.0000.00817.26
8.0.250.0000.00716.97
8.0.240.0040.00416.96
8.0.230.0030.00316.99
8.0.220.0000.00716.86
8.0.210.0030.00316.77
8.0.200.0000.00617.00
8.0.190.0000.00816.96
8.0.180.0000.00716.89
8.0.170.0040.00417.00
8.0.160.0040.00316.89
8.0.150.0000.00816.78
8.0.140.0030.00316.82
8.0.130.0030.00613.39
8.0.120.0000.00816.93
8.0.110.0040.00416.94
8.0.100.0050.00316.84
8.0.90.0040.00416.91
8.0.80.0090.00616.88
8.0.70.0080.00016.94
8.0.60.0040.00416.96
8.0.50.0060.00316.96
8.0.30.0120.00617.10
8.0.20.0090.00917.40
8.0.10.0000.00716.86
8.0.00.0120.00616.76
7.4.330.0050.00015.09
7.4.320.0000.00616.50
7.4.300.0040.00416.61
7.4.290.0030.00316.53
7.4.280.0000.00716.60
7.4.270.0070.00016.41
7.4.260.0060.00016.52
7.4.250.0000.00816.57
7.4.240.0020.00516.59
7.4.230.0000.00716.51
7.4.220.0160.00316.55
7.4.210.0070.01416.63
7.4.200.0000.00816.27
7.4.160.0120.00616.39
7.4.150.0000.01917.40
7.4.140.0100.01017.86
7.4.130.0090.01016.42
7.4.120.0150.00216.54
7.4.110.0030.01316.64
7.4.100.0140.00316.50
7.4.90.0090.01116.53
7.4.80.0110.00718.63
7.4.70.0100.00616.43
7.4.60.0030.01516.38
7.4.50.0000.00616.36
7.4.40.0110.00716.59
7.4.30.0130.00316.52
7.4.00.0070.00715.11
7.3.330.0000.00513.03
7.3.320.0000.00513.14
7.3.310.0080.00016.20
7.3.300.0070.00016.18
7.3.290.0090.01216.24
7.3.280.0110.00416.25
7.3.270.0130.00417.40
7.3.260.0160.00016.18
7.3.250.0090.01116.46
7.3.240.0100.00916.34
7.3.230.0090.00916.39
7.3.210.0180.00716.49
7.3.200.0060.01319.39
7.3.190.0030.01316.42
7.3.180.0030.01316.45
7.3.170.0130.00316.40
7.3.160.0060.01016.39
7.2.330.0140.00316.72
7.2.320.0160.00716.66
7.2.310.0060.01216.55
7.2.300.0100.00616.55
7.2.290.0090.00916.72
7.2.00.0060.00619.04
7.1.100.0120.00618.15
7.1.70.0040.00416.74
7.1.60.0120.00319.32
7.1.50.0040.00716.68
7.1.00.0030.07722.45
7.0.200.0000.00716.80
7.0.140.0100.06722.01
7.0.60.0200.07020.02
7.0.50.0070.08317.90
7.0.40.0000.05020.24
7.0.30.0300.07720.21
7.0.20.0230.05020.20
7.0.10.0000.08320.30
7.0.00.0170.06720.01
5.6.280.0070.07020.88
5.6.210.0070.06320.75
5.6.200.0070.07718.22
5.6.190.0070.06720.48
5.6.180.0330.07720.43
5.6.170.0200.04320.50
5.6.160.0100.07320.56
5.6.150.0100.06718.18
5.6.140.0070.08018.12
5.6.130.0100.06718.11
5.6.120.0130.07721.11
5.6.110.0230.06021.04
5.6.100.0070.07021.05
5.6.90.0070.08020.98
5.6.80.0070.08020.24
5.5.350.0130.08020.29
5.5.340.0070.08317.95
5.5.330.0100.08320.07
5.5.320.0030.08320.24
5.5.310.0400.04020.21
5.5.300.0030.04017.91
5.5.290.0070.04717.92
5.5.280.0000.05020.73
5.5.270.0030.04720.85
5.5.260.0070.07020.95
5.5.250.0070.07720.64
5.5.240.0030.08020.26
5.4.450.3830.04319.46
5.4.440.4370.04319.11
5.4.430.3870.03719.40
5.4.420.4030.03319.23
5.4.410.4100.03019.28
5.4.400.4100.03319.22
5.4.390.3600.03318.88
5.4.380.3800.04319.25
5.4.370.3830.03318.81
5.4.360.3830.03319.04
5.4.350.3930.03319.06
5.4.340.4130.04319.13
5.4.320.3500.03718.91
5.4.310.4100.03019.08
5.4.300.3500.03319.24
5.4.290.3770.03719.13
5.4.280.3500.03319.09
5.4.270.3900.03718.92
5.4.260.3970.03018.88
5.4.250.3700.04019.12
5.4.240.4130.04319.21
5.4.230.2970.04319.13
5.4.220.3970.04019.07
5.4.210.3700.03319.24
5.4.200.3570.04018.80
5.4.190.3800.03719.09
5.4.180.3870.03319.13
5.4.170.3900.03719.07
5.4.160.3270.03319.11
5.4.150.4070.05319.21
5.4.140.3770.04016.57
5.4.130.3900.03716.45
5.4.120.3770.03716.54
5.4.110.3600.03716.39
5.4.100.3500.04016.38
5.4.90.3270.03316.43
5.4.80.3570.03016.20
5.4.70.3870.03016.44
5.4.60.2930.03716.36
5.4.50.3570.03316.36
5.4.40.3530.03316.38
5.4.30.3530.03716.36
5.4.20.3670.04016.38
5.4.10.4070.04016.31
5.4.00.3430.04015.77
5.3.290.3770.04314.61
5.3.280.3870.04014.61
5.3.270.3730.04314.43
5.3.260.3870.03714.46
5.3.250.3800.03314.44
5.3.240.3870.04014.69
5.3.230.3870.03314.44
5.3.220.3900.03314.59
5.3.210.3670.03714.51
5.3.200.3570.03314.65
5.3.190.3370.04314.63
5.3.180.3200.04014.51
5.3.170.3270.03714.49
5.3.160.3470.04014.39
5.3.150.3930.04014.43
5.3.140.3430.04314.41
5.3.130.3430.03714.45
5.3.120.3730.04014.49
5.3.110.3800.03714.65
5.3.100.3630.03313.87
5.3.90.4070.03713.85
5.3.80.3870.03313.89
5.3.70.3570.04013.86
5.3.60.4300.03713.95
5.3.50.4070.03313.88
5.3.40.3800.03313.72
5.3.30.3830.03713.74
5.3.20.4070.03713.78
5.3.10.3830.03713.62
5.3.00.3500.03713.51
5.2.170.2900.02711.15
5.2.160.3330.02711.10
5.2.150.3070.03010.99
5.2.140.3170.03010.99
5.2.130.3200.03311.02
5.2.120.3100.02710.95
5.2.110.3100.03010.94
5.2.100.3200.02711.11
5.2.90.2970.02710.96
5.2.80.3170.02710.94
5.2.70.3200.03011.11
5.2.60.3100.03310.98
5.2.50.3230.02710.87
5.2.40.2530.03010.92
5.2.30.2630.02711.01
5.2.20.2300.03310.89
5.2.10.2970.02710.78
5.2.00.2630.03010.63
5.1.60.2830.0239.86
5.1.50.2330.02310.03
5.1.40.2370.0179.86
5.1.30.2670.02710.27
5.1.20.2530.03010.50
5.1.10.2700.02010.03
5.1.00.2370.02310.04
5.0.50.1200.0179.56
5.0.40.1330.0209.56
5.0.30.1430.0309.56
5.0.20.1370.0209.56
5.0.10.1670.0209.56
5.0.00.1670.0339.56
4.4.90.0830.0209.56
4.4.80.0730.0109.56
4.4.70.1300.0179.56
4.4.60.1400.0179.56
4.4.50.1570.0179.56
4.4.40.1470.0379.56
4.4.30.1170.0139.56
4.4.20.1430.0179.56
4.4.10.1130.0179.56
4.4.00.1300.0209.56
4.3.110.1430.0179.56
4.3.100.1700.0209.56
4.3.90.1400.0179.56
4.3.80.1400.0279.56
4.3.70.1570.0179.56
4.3.60.1570.0109.56
4.3.50.1430.0179.56
4.3.40.1570.0309.56
4.3.30.0070.0339.56
4.3.20.0900.0179.56
4.3.10.0900.0239.56
4.3.00.0870.0209.56

preferences:
39.52 ms | 401 KiB | 5 Q