3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a0 = 'ab'; $a1 = 'a'; $a2 = 'b'; print ${$a1 + $a2};

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)
8.3.60.0060.00918.55
8.3.50.0150.00721.14
8.3.40.0130.00318.97
8.3.30.0060.00918.85
8.3.20.0030.00620.34
8.3.10.0030.00523.61
8.3.00.0090.00019.69
8.2.180.0060.00916.63
8.2.170.0070.00722.96
8.2.160.0110.00420.48
8.2.150.0090.00924.18
8.2.140.0100.01024.66
8.2.130.0070.01126.16
8.2.120.0030.00617.75
8.2.110.0030.00621.11
8.2.100.0070.00417.91
8.2.90.0000.00918.03
8.2.80.0080.00018.22
8.2.70.0040.00417.91
8.2.60.0060.00317.93
8.2.50.0040.00718.10
8.2.40.0040.00420.33
8.2.30.0070.00017.87
8.2.20.0040.00417.60
8.2.10.0040.00418.06
8.2.00.0040.00417.95
8.1.280.0000.01525.92
8.1.270.0050.00320.37
8.1.260.0000.01226.35
8.1.250.0050.00328.09
8.1.240.0060.00322.33
8.1.230.0000.01120.89
8.1.220.0000.00817.79
8.1.210.0050.00318.77
8.1.200.0000.00817.35
8.1.190.0100.00017.23
8.1.180.0000.00818.10
8.1.170.0000.00818.72
8.1.160.0030.00422.13
8.1.150.0040.00418.70
8.1.140.0060.00317.34
8.1.130.0000.00717.53
8.1.120.0000.00717.43
8.1.110.0060.00317.38
8.1.100.0050.00217.42
8.1.90.0030.00517.37
8.1.80.0060.00317.36
8.1.70.0040.00417.39
8.1.60.0060.00317.46
8.1.50.0040.00417.52
8.1.40.0040.00417.41
8.1.30.0000.00817.54
8.1.20.0040.00417.61
8.1.10.0040.00417.56
8.1.00.0000.00817.39
8.0.300.0040.00419.91
8.0.290.0040.00416.63
8.0.280.0050.00318.42
8.0.270.0000.00717.19
8.0.260.0000.00717.07
8.0.250.0000.00817.02
8.0.240.0040.00416.97
8.0.230.0000.00916.84
8.0.220.0070.00016.89
8.0.210.0000.00816.87
8.0.200.0000.00716.93
8.0.190.0030.00816.96
8.0.180.0050.00316.89
8.0.170.0030.00616.88
8.0.160.0000.00816.96
8.0.150.0040.00416.90
8.0.140.0000.00816.76
8.0.130.0000.00613.34
8.0.120.0000.00816.71
8.0.110.0000.00716.79
8.0.100.0000.00816.77
8.0.90.0040.00416.74
8.0.80.0050.01116.85
8.0.70.0040.00416.86
8.0.60.0040.00416.94
8.0.50.0030.00616.69
8.0.30.0090.00917.05
8.0.20.0100.01017.40
8.0.10.0040.00416.89
8.0.00.0100.00816.93
7.4.330.0030.00315.15
7.4.320.0000.00716.59
7.4.300.0000.00716.41
7.4.290.0030.00316.49
7.4.280.0030.00316.40
7.4.270.0000.00716.44
7.4.260.0050.00516.57
7.4.250.0000.00816.54
7.4.240.0040.00416.45
7.4.230.0040.00416.57
7.4.220.0060.01316.64
7.4.210.0090.00516.50
7.4.200.0030.00316.59
7.4.160.0090.00616.68
7.4.150.0090.00917.40
7.4.140.0080.01217.86
7.4.130.0090.01216.50
7.4.120.0060.01016.49
7.4.110.0100.00716.39
7.4.100.0140.00616.41
7.4.90.0090.01216.51
7.4.80.0040.01219.39
7.4.70.0060.01516.59
7.4.60.0070.01116.49
7.4.50.0000.00916.51
7.4.40.0140.00416.35
7.4.30.0190.00416.50
7.4.00.0030.01414.94
7.3.330.0000.00513.22
7.3.320.0030.00313.16
7.3.310.0070.00016.39
7.3.300.0030.00316.25
7.3.290.0070.00016.25
7.3.280.0100.00916.24
7.3.270.0070.01017.40
7.3.260.0180.00616.34
7.3.250.0060.01316.25
7.3.240.0070.01016.49
7.3.230.0080.00916.39
7.3.210.0130.00916.40
7.3.200.0090.01316.54
7.3.190.0030.01316.41
7.3.180.0060.00916.30
7.3.170.0140.00716.30
7.3.160.0080.00916.34
7.3.10.0040.01316.18
7.3.00.0130.01016.47
7.2.330.0040.01416.66
7.2.320.0080.00916.61
7.2.310.0140.00316.43
7.2.300.0070.01416.60
7.2.290.0030.01816.71
7.2.130.0090.00916.42
7.2.120.0000.01316.31
7.2.110.0060.00916.82
7.2.100.0110.00416.23
7.2.90.0060.01016.85
7.2.80.0100.01316.16
7.2.70.0110.01116.39
7.2.60.0070.01216.72
7.2.50.0160.00616.20
7.2.40.0140.00316.57
7.2.30.0170.00816.53
7.2.20.0090.00616.30
7.2.10.0090.00316.31
7.2.00.0070.00917.70
7.1.250.0110.00715.16
7.1.200.0110.00015.70
7.1.100.0220.00917.41
7.1.70.0090.00317.11
7.1.60.0090.01319.12
7.1.50.0000.01716.86
7.1.00.0030.07722.46
7.0.200.0090.00916.54
7.0.60.0170.06719.88
7.0.50.0100.08317.90
7.0.40.0070.09020.05
7.0.30.0270.08020.13
7.0.20.0370.06020.20
7.0.10.0130.04020.08
7.0.00.0030.06020.17
5.6.280.0070.06721.14
5.6.210.0100.04720.63
5.6.200.0100.08018.06
5.6.190.0070.07720.61
5.6.180.0200.05720.61
5.6.170.0200.06020.37
5.6.160.0000.04720.47
5.6.150.0070.04318.09
5.6.140.0070.06018.08
5.6.130.0030.08018.18
5.6.120.0100.05321.09
5.6.110.0170.05721.10
5.6.100.0170.07720.99
5.6.90.0070.04021.02
5.6.80.0100.07720.52
5.6.70.0270.06320.41
5.5.350.3300.03320.45
5.5.340.0000.04317.99
5.5.330.0000.06320.36
5.5.320.0300.04720.25
5.5.310.0270.07320.29
5.5.300.0070.08017.95
5.5.290.0130.07717.89
5.5.280.0030.08320.86
5.5.270.0100.08020.86
5.5.260.0030.06020.75
5.5.250.0070.05720.61
5.5.240.0130.06320.15
5.4.450.0770.07719.63
5.4.440.0700.05319.54
5.4.430.0030.06019.48
5.4.420.0170.04719.31
5.4.410.0430.05019.34
5.4.400.0630.05319.26
5.4.390.0270.06019.21
5.4.380.0170.04318.95
5.4.370.0200.05719.14
5.4.360.0600.06319.01
5.4.350.0730.05319.28
5.4.340.0800.05718.78
5.4.320.0570.06318.77
5.4.310.0800.05318.77
5.4.300.0630.06319.19
5.4.290.0700.05719.12
5.4.280.0730.05719.07
5.4.270.0700.05319.30
5.4.260.0730.04019.18
5.4.250.0770.05019.16
5.4.240.0800.04719.21
5.4.230.0730.04018.77
5.4.220.0730.05319.18
5.4.210.0770.05019.18
5.4.200.0700.05318.77
5.4.190.0630.05319.22
5.4.180.0800.05019.13
5.4.170.0630.05719.14
5.4.160.0670.05319.28
5.4.150.0730.05018.75
5.4.140.0830.04316.26
5.4.130.0670.05016.51
5.4.120.0700.05016.57
5.4.110.0830.04716.56
5.4.100.0800.03716.47
5.4.90.0870.04316.21
5.4.80.0570.05316.50
5.4.70.0300.04316.50
5.4.60.0330.03016.32
5.4.50.0030.07016.36
5.4.40.0000.07316.04
5.4.30.0030.03316.28
5.4.20.0030.06716.19

preferences:
52.92 ms | 401 KiB | 5 Q