3v4l.org

run code in 300+ PHP versions simultaneously
<?php $length = 8; $id = substr(base_convert(md5(uniqid(rand(), true)), 16, 36), 1, $length); print $id;

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)
7.4.00.0200.00014.97
7.3.120.0040.00814.91
7.3.110.0040.01214.85
7.3.100.0070.01115.06
7.3.90.0000.01514.97
7.3.80.0060.00914.93
7.3.70.0040.01114.73
7.3.60.0070.00714.87
7.3.50.0060.00614.66
7.3.40.0070.00414.93
7.3.30.0140.00014.79
7.3.20.0120.00316.54
7.3.10.0070.00616.49
7.3.00.0040.01216.56
7.2.250.0000.02115.34
7.2.240.0030.01415.22
7.2.230.0060.00915.04
7.2.220.0030.01315.04
7.2.210.0070.01014.66
7.2.200.0060.00915.19
7.2.190.0060.00915.13
7.2.180.0060.00915.07
7.2.170.0000.01315.16
7.2.130.0080.00516.87
7.2.120.0080.00716.73
7.2.110.0060.00916.71
7.2.100.0050.01016.96
7.2.90.0110.00516.69
7.2.80.0110.00616.79
7.2.70.0050.01016.92
7.2.60.0090.01016.81
7.2.50.0080.00916.79
7.2.40.0100.00616.64
7.2.30.0100.00816.98
7.2.20.0120.00816.81
7.2.10.0140.00916.44
7.2.00.0090.00917.78
7.1.330.0000.01416.13
7.1.320.0040.01115.98
7.1.310.0130.00316.03
7.1.300.0030.01015.96
7.1.290.0060.00615.59
7.1.280.0070.01015.83
7.1.270.0080.00315.60
7.1.260.0030.01315.79
7.1.250.0110.00515.81
7.1.70.0030.00617.16
7.1.60.0140.01119.40
7.1.50.0070.01117.13
7.1.00.0030.07322.70
7.0.200.0210.00714.81
7.0.140.0030.07322.25
7.0.120.0000.07722.32
7.0.60.0130.07019.93
7.0.50.0100.04718.02
7.0.40.0130.05717.79
7.0.30.0130.08017.75
7.0.20.0100.08317.84
7.0.10.0030.07717.81
7.0.00.0100.05717.88
5.6.280.0070.07021.27
5.6.210.0170.07720.76
5.6.200.0130.07718.32
5.6.190.0130.04718.31
5.6.180.0100.06018.29
5.6.170.0100.05318.30
5.6.160.0200.07018.34
5.6.150.0070.05718.28
5.6.140.0100.07718.25
5.6.130.0100.07718.17
5.6.120.0100.06018.34
5.6.110.0070.08018.21
5.6.100.0130.07718.24
5.6.90.0100.07018.28
5.6.80.0030.07317.70
5.6.70.0100.07317.72
5.6.60.0130.06017.64
5.6.50.0000.05717.55
5.6.40.0100.06717.70
5.6.30.0030.08317.54
5.6.20.0070.07717.62
5.6.10.0070.07317.53
5.6.00.0030.08017.59
5.5.350.0270.02720.64
5.5.340.0070.08018.10
5.5.330.0070.07018.02
5.5.320.0130.07717.97
5.5.310.0100.08017.98
5.5.300.0070.08718.10
5.5.290.0000.05317.97
5.5.280.0100.03717.96
5.5.270.0070.08718.08
5.5.260.0130.07718.08
5.5.250.0070.06717.86
5.5.240.0000.04717.39
5.5.230.0000.08717.44
5.5.220.0170.06717.39
5.5.210.0130.05017.52
5.5.200.0070.03717.43
5.5.190.0070.06317.40
5.5.180.0100.07717.46
5.5.160.0130.07717.33
5.5.150.0070.05017.39
5.5.140.0100.08017.34
5.5.130.0030.08317.49
5.5.120.0070.07717.37
5.5.110.0030.06017.48
5.5.100.0030.06717.32
5.5.90.0100.07017.39
5.5.80.0070.07717.39
5.5.70.0070.05017.34
5.5.60.0070.07717.38
5.5.50.0200.06317.27
5.5.40.0170.06717.38
5.5.30.0100.07717.37
5.5.20.0070.06017.31
5.5.10.0070.03317.34
5.5.00.0030.03717.25
5.4.450.0070.04319.45
5.4.440.0130.08019.51
5.4.430.0130.04319.35
5.4.420.0130.06019.51
5.4.410.0230.06019.29
5.4.400.0070.03718.95
5.4.390.0100.07719.18
5.4.380.0030.05719.11
5.4.370.0030.08319.11
5.4.360.0000.04319.20
5.4.350.0070.05718.96
5.4.340.0100.07319.18
5.4.320.0070.08019.16
5.4.310.0130.07319.02
5.4.300.0170.06719.02
5.4.290.0070.07719.15
5.4.280.0030.08319.03
5.4.270.0100.06319.11
5.4.260.0100.05719.09
5.4.250.0070.07319.32
5.4.240.0030.07719.11
5.4.230.0000.04319.19
5.4.220.0070.05318.95
5.4.210.0070.04319.10
5.4.200.0070.07719.10
5.4.190.0100.06319.13
5.4.180.0100.05719.14
5.4.170.0000.05019.10
5.4.160.0070.04019.10
5.4.150.0000.04019.20
5.4.140.0070.03016.45
5.4.130.0000.04316.34
5.4.120.0000.03716.53
5.4.110.0070.03316.38
5.4.100.0070.05716.53
5.4.90.0030.03316.49
5.4.80.0030.03316.39
5.4.70.0000.04016.48
5.4.60.0000.03716.46
5.4.50.0070.03316.42
5.4.40.0030.03316.39
5.4.30.0030.03316.42
5.4.20.0030.03316.39
5.4.10.0000.03716.32
5.4.00.0030.03315.79
5.3.290.0170.07314.66
5.3.280.0100.07714.54
5.3.270.0130.03014.68
5.3.260.0000.04014.54
5.3.250.0000.04014.52
5.3.240.0070.03314.56
5.3.230.0000.04714.68
5.3.220.0000.04014.49
5.3.210.0000.04014.54
5.3.200.0100.03014.39
5.3.190.0030.03714.49
5.3.180.0000.04014.48
5.3.170.0030.03314.51
5.3.160.0070.03314.47
5.3.150.0030.03714.41
5.3.140.0000.04014.52
5.3.130.0000.04014.53
5.3.120.0030.04714.47
5.3.110.0100.03314.48
5.3.100.0030.03314.00
5.3.90.0100.02713.96
5.3.80.0030.03313.93
5.3.70.0070.03713.79
5.3.60.0000.03713.91
5.3.50.0030.03713.86
5.3.40.0000.04313.72
5.3.30.0030.07013.69
5.3.20.0070.03713.66
5.3.10.0070.04013.47
5.3.00.0100.06713.59
5.2.170.0000.03010.97
5.2.160.0030.03011.14
5.2.150.0030.03711.12
5.2.140.0000.03311.12
5.2.130.0100.05310.95
5.2.120.0030.03711.07
5.2.110.0070.06011.08
5.2.100.0030.06011.09
5.2.90.0030.05011.08
5.2.80.0000.06711.05
5.2.70.0070.03711.12
5.2.60.0070.03711.19
5.2.50.0000.06310.91
5.2.40.0030.05710.97
5.2.30.0000.04010.94
5.2.20.0000.06010.98
5.2.10.0030.06310.89
5.2.00.0030.06010.84
5.1.60.0030.04010.09
5.1.50.0070.05010.08
5.1.40.0100.02710.10
5.1.30.0100.04010.43
5.1.20.0000.03010.39
5.1.10.0000.05710.00
5.1.00.0100.05010.17
5.0.50.0000.0278.52
5.0.40.0000.0478.50
5.0.30.0070.0608.27
5.0.20.0070.0408.31
5.0.10.0100.0208.25
5.0.00.0030.0708.28
4.4.90.0030.0207.59
4.4.80.0030.0337.59
4.4.70.0030.0277.59
4.4.60.0000.0377.59
4.4.50.0000.0377.59
4.4.40.0000.0337.59
4.4.30.0100.0277.59
4.4.20.0030.0237.59
4.4.10.0000.0377.59
4.4.00.0000.0577.59
4.3.110.0000.0337.59
4.3.100.0070.0307.59
4.3.90.0030.0277.59
4.3.80.0030.0507.59
4.3.70.0070.0337.59
4.3.60.0030.0337.59
4.3.50.0070.0237.59
4.3.40.0030.0507.59
4.3.30.0030.0377.59
4.3.20.0000.0337.59
4.3.10.0000.0307.59
4.3.00.0000.0377.59

preferences:
29.51 ms | 401 KiB | 5 Q