3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(-1); function myCheck($in) { return isset($in); } $var1='Something'; $var2='var1'; echo 'Set:' . isset($$var2); $var2='nope'; echo 'Set:' . isset($$var2); $var2='var1'; echo 'Set:' . myCheck($$var2); $var2='nope'; echo 'Set:' . myCheck($$var2); ?>

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)
8.3.40.0120.00318.84
8.3.30.0140.00018.71
8.3.20.0040.00418.65
8.3.10.0000.00820.53
8.3.00.0050.00317.50
8.2.170.0060.00922.96
8.2.160.0070.01019.36
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0080.00026.16
8.2.120.0040.00421.09
8.2.110.0070.00321.05
8.2.100.0040.00817.91
8.2.90.0000.01020.79
8.2.80.0040.00417.80
8.2.70.0040.00417.63
8.2.60.0030.00517.80
8.2.50.0040.00418.07
8.2.40.0040.00418.09
8.2.30.0000.00817.93
8.2.20.0040.00417.56
8.2.10.0000.00717.53
8.2.00.0070.00317.66
8.1.270.0000.00824.66
8.1.260.0000.00826.35
8.1.250.0070.00028.09
8.1.240.0070.00322.56
8.1.230.0000.01220.98
8.1.220.0080.00017.74
8.1.210.0000.00818.95
8.1.200.0060.00617.35
8.1.190.0070.00017.50
8.1.180.0040.00418.10
8.1.170.0040.00418.84
8.1.160.0000.00818.89
8.1.150.0040.00418.58
8.1.140.0040.00417.44
8.1.130.0030.00317.81
8.1.120.0080.00017.52
8.1.110.0000.00717.44
8.1.100.0000.00817.51
8.1.90.0000.00717.38
8.1.80.0000.00717.48
8.1.70.0000.00717.47
8.1.60.0040.00417.54
8.1.50.0070.00017.35
8.1.40.0000.00717.50
8.1.30.0050.00217.68
8.1.20.0040.00417.68
8.1.10.0040.00417.50
8.1.00.0040.00417.27
8.0.300.0030.00520.02
8.0.290.0040.00416.75
8.0.280.0040.00418.39
8.0.270.0070.00017.17
8.0.260.0000.00716.77
8.0.250.0000.00816.95
8.0.240.0070.00316.89
8.0.230.0050.00217.00
8.0.220.0030.00316.91
8.0.210.0070.00016.93
8.0.200.0030.00316.96
8.0.190.0000.00716.89
8.0.180.0040.00416.98
8.0.170.0000.00816.97
8.0.160.0030.00416.86
8.0.150.0040.00416.93
8.0.140.0000.00816.94
8.0.130.0060.00013.37
8.0.120.0040.00416.93
8.0.110.0040.00416.93
8.0.100.0050.00317.01
8.0.90.0000.00816.83
8.0.80.0040.01816.91
8.0.70.0070.00017.01
8.0.60.0000.00916.96
8.0.50.0040.00416.83
8.0.30.0100.00817.02
8.0.20.0100.00917.09
8.0.10.0040.00417.04
8.0.00.0110.00616.73
7.4.330.0000.00513.01
7.4.320.0000.00716.39
7.4.300.0040.00416.50
7.4.290.0040.00416.59
7.4.280.0060.00316.44
7.4.270.0000.00716.51
7.4.260.0000.00513.23
7.4.250.0000.00816.41
7.4.240.0030.00316.49
7.4.230.0020.00516.49
7.4.220.0030.01416.59
7.4.210.0090.00816.52
7.4.200.0060.00316.67
7.4.190.0050.00316.44
7.4.160.0040.01216.50
7.4.150.0160.00616.60
7.4.140.0090.01016.61
7.4.130.0080.00816.53
7.4.120.0100.01416.56
7.4.110.0060.01216.67
7.4.100.0030.01716.39
7.4.90.0130.00616.51
7.4.80.0130.00316.73
7.4.70.0030.01316.46
7.4.60.0170.00716.42
7.4.50.0000.00616.61
7.4.40.0060.00616.50
7.4.30.0080.00816.59
7.4.00.0070.01014.68
7.3.330.0000.00613.12
7.3.320.0050.00013.35
7.3.310.0000.00716.38
7.3.300.0000.00716.17
7.3.290.0060.01316.32
7.3.280.0110.00416.36
7.3.270.0080.00816.49
7.3.260.0070.01216.49
7.3.250.0080.01116.53
7.3.240.0030.01316.64
7.3.230.0140.00316.56
7.3.210.0070.01116.27
7.3.200.0060.01019.39
7.3.190.0090.01416.40
7.3.180.0130.00716.64
7.3.170.0030.01216.50
7.3.160.0070.00816.37
7.3.120.0090.00614.64
7.2.330.0070.01416.60
7.2.320.0090.00916.75
7.2.310.0150.00616.71
7.2.300.0100.00716.70
7.2.290.0080.00916.58
7.2.00.0060.00919.30
7.1.200.0060.00615.90
7.1.100.0060.00918.30
7.1.70.0000.00716.91
7.1.60.0070.01719.40
7.1.50.0000.01516.88
7.1.00.0000.08022.31
7.0.200.0230.00614.86
7.0.140.0100.06322.21
7.0.120.0000.07722.00
7.0.60.0200.06719.93
7.0.50.0100.04717.87
7.0.40.0070.07719.96
7.0.30.0000.06020.15
7.0.20.0130.08320.02
7.0.10.0030.05320.23
7.0.00.0070.08720.25
5.6.280.0030.07020.97
5.6.210.0100.04720.46
5.6.200.0030.05018.17
5.6.190.0070.04320.52
5.6.180.0030.04320.61
5.6.170.0130.07020.39
5.6.160.0070.08320.51
5.6.150.0100.05020.52
5.6.140.0100.04320.43
5.6.130.0130.06320.41
5.6.120.0100.07320.34
5.6.110.0030.04720.48
5.6.100.0100.08320.17
5.6.90.0030.08020.37
5.6.80.0000.05719.62
5.6.70.0070.08719.71
5.6.60.0000.06719.89
5.6.50.0100.07719.79
5.6.40.0030.04719.76
5.6.30.0100.05319.88
5.6.20.0000.04319.52
5.6.10.0130.06719.79
5.6.00.0100.07019.71
5.5.350.0070.08020.37
5.5.340.0100.04317.98
5.5.330.0070.04720.23
5.5.320.0130.07720.47
5.5.310.0000.05020.40
5.5.300.0070.04720.14
5.5.290.0070.05020.29
5.5.280.0100.05020.31
5.5.270.0070.06020.12
5.5.260.0070.08020.19
5.5.250.0000.05319.78
5.5.240.0030.06019.50
5.5.230.0030.08019.51
5.5.220.0030.07719.52
5.5.210.0130.07319.51
5.5.200.0030.05019.39
5.5.190.0030.04319.59
5.5.180.0030.08019.61
5.5.160.0100.04019.54
5.5.150.0030.06319.48
5.5.140.0030.05719.54
5.5.130.0130.07019.51
5.5.120.0100.05019.61
5.5.110.0070.08719.31
5.5.100.0070.03719.39
5.5.90.0100.04719.37
5.5.80.0100.04319.54
5.5.70.0100.06719.27
5.5.60.0130.07319.27
5.5.50.0100.07719.22
5.5.40.0030.05719.46
5.5.30.0130.07019.43
5.5.20.0130.07319.38
5.5.10.0070.06019.38
5.5.00.0130.07019.36
5.4.450.0130.05319.25
5.4.440.0070.08319.57
5.4.430.0100.07719.46
5.4.420.0170.07019.48
5.4.410.0070.06019.40
5.4.400.0030.06719.08
5.4.390.0030.05018.87
5.4.380.0070.03718.98
5.4.370.0200.05019.23
5.4.360.0170.04719.24
5.4.350.0100.03718.87
5.4.340.0130.04019.10
5.4.320.0100.04019.16
5.4.310.0100.07319.20
5.4.300.0000.04018.97
5.4.290.0030.03719.09
5.4.280.0070.07719.24
5.4.270.0070.04319.00
5.4.260.0070.05319.14
5.4.250.0030.06319.14
5.4.240.0070.04318.97
5.4.230.0070.04319.00
5.4.220.0070.06319.11
5.4.210.0070.05019.14
5.4.200.0100.03718.84
5.4.190.0030.04718.96
5.4.180.0070.07719.13
5.4.170.0070.05019.11
5.4.160.0030.05319.13
5.4.150.0130.06719.18
5.4.140.0000.04316.41
5.4.130.0070.07016.39
5.4.120.0070.05316.34
5.4.110.0030.05016.46
5.4.100.0100.05316.38
5.4.90.0000.04016.39
5.4.80.0070.03316.36
5.4.70.0070.03316.41
5.4.60.0030.03716.31
5.4.50.0030.03316.36
5.4.40.0000.04016.42
5.4.30.0030.04716.27
5.4.20.0070.03016.40
5.4.10.0070.03016.44
5.4.00.0130.02315.95
5.3.290.0030.04714.71
5.3.280.0130.07014.60
5.3.270.0030.06714.60
5.3.260.0130.07314.61
5.3.250.0070.07314.63
5.3.240.0100.07014.59
5.3.230.0130.07314.61
5.3.220.0030.07314.61
5.3.210.0070.08014.59
5.3.200.0100.07314.59
5.3.190.0100.03314.56
5.3.180.0100.03014.57
5.3.170.0030.03714.62
5.3.160.0030.03714.63
5.3.150.0000.04014.62
5.3.140.0100.03014.71
5.3.130.0000.04014.55
5.3.120.0070.03314.46
5.3.110.0030.04314.59
5.3.100.0070.03313.96
5.3.90.0070.03014.09
5.3.80.0030.03314.18
5.3.70.0100.03014.17
5.3.60.0030.03314.00
5.3.50.0000.03714.00
5.3.40.0100.03313.86
5.3.30.0070.03313.90
5.3.20.0030.03313.59
5.3.10.0070.03013.66
5.3.00.0030.03313.80
5.2.170.0000.03011.04
5.2.160.0030.02711.30
5.2.150.0000.03011.10
5.2.140.0000.03711.22
5.2.130.0030.02711.10
5.2.120.0000.03011.16
5.2.110.0030.02711.24
5.2.100.0070.02311.05
5.2.90.0000.03011.16
5.2.80.0070.02311.25
5.2.70.0030.02711.16
5.2.60.0030.02711.06
5.2.50.0000.03010.96
5.2.40.0030.02710.98
5.2.30.0000.03010.97
5.2.20.0000.03010.96
5.2.10.0000.03010.86
5.2.00.0000.03010.71
5.1.60.0030.02710.05
5.1.50.0030.0239.98
5.1.40.0030.0209.97
5.1.30.0070.02010.48
5.1.20.0030.02310.38
5.1.10.0070.0209.97
5.1.00.0070.02310.21
5.0.50.0000.0408.61
5.0.40.0070.0438.31
5.0.30.0100.0538.24
5.0.20.0000.0408.17
5.0.10.0070.0408.07
5.0.00.0000.0378.07
4.4.90.0030.0107.47
4.4.80.0000.0177.47
4.4.70.0000.0177.47
4.4.60.0000.0177.47
4.4.50.0000.0207.47
4.4.40.0000.0237.47
4.4.30.0030.0137.47
4.4.20.0000.0177.47
4.4.10.0000.0237.47
4.4.00.0000.0337.47
4.3.110.0000.0437.47
4.3.100.0030.0337.47
4.3.90.0000.0207.47
4.3.80.0000.0377.47
4.3.70.0030.0137.47
4.3.60.0030.0137.47
4.3.50.0000.0177.47
4.3.40.0000.0277.47
4.3.30.0000.0207.47
4.3.20.0030.0337.47
4.3.10.0030.0277.47
4.3.00.0030.0277.47

preferences:
46.58 ms | 400 KiB | 5 Q