3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'Hello World!'; var_dump(\unpack('A16', \pack('A16', $str))[1]); // Decoding "space padded string" strips added spaces var_dump(\unpack('a16', \pack('A16', $str))[1]); // Decoding "null padded string" leaves them there

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)
8.3.70.0060.00916.58
8.3.60.0180.00418.07
8.3.50.0110.00416.26
8.3.40.0120.00618.71
8.3.30.0110.00818.42
8.3.20.0070.00020.07
8.3.10.0080.00023.55
8.3.00.0040.00419.38
8.2.190.0130.00616.63
8.2.180.0120.00318.05
8.2.170.0030.01022.96
8.2.160.0080.00520.39
8.2.150.0070.00025.66
8.2.140.0030.00624.66
8.2.130.0040.00422.07
8.2.120.0080.00026.35
8.2.110.0060.00322.27
8.2.100.0040.00718.09
8.2.90.0050.00320.38
8.2.80.0040.00417.97
8.2.70.0040.00417.93
8.2.60.0040.00418.03
8.2.50.0040.00418.22
8.2.40.0070.00020.40
8.2.30.0000.00719.38
8.2.20.0080.00018.15
8.2.10.0040.00417.96
8.2.00.0040.00318.17
8.1.280.0110.00425.92
8.1.270.0030.00623.82
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0000.00922.14
8.1.230.0070.00319.00
8.1.220.0000.00817.74
8.1.210.0060.00318.77
8.1.200.0030.00617.23
8.1.190.0000.00917.23
8.1.180.0040.00418.10
8.1.170.0000.00718.58
8.1.160.0040.00418.77
8.1.150.0040.00420.30
8.1.140.0000.00717.59
8.1.130.0030.00319.02
8.1.120.0080.00017.38
8.1.110.0070.00017.33
8.1.100.0000.00817.37
8.1.90.0050.00317.29
8.1.80.0040.00417.43
8.1.70.0000.00817.31
8.1.60.0040.00417.39
8.1.50.0000.00817.47
8.1.40.0040.00417.43
8.1.30.0000.00717.47
8.1.20.0060.00317.64
8.1.10.0050.00317.51
8.1.00.0000.00817.32
8.0.300.0000.00719.66
8.0.290.0060.00316.63
8.0.280.0030.00718.36
8.0.270.0000.00817.14
8.0.260.0080.00017.18
8.0.250.0030.00316.91
8.0.240.0040.00416.91
8.0.230.0040.00416.85
8.0.220.0040.00416.88
8.0.210.0030.00316.71
8.0.200.0030.00316.91
8.0.190.0000.00816.89
8.0.180.0040.00416.74
8.0.170.0090.00016.82
8.0.160.0040.00416.78
8.0.150.0080.00016.76
8.0.140.0030.00316.66
8.0.130.0000.00513.20
8.0.120.0040.00416.78
8.0.110.0040.00416.79
8.0.100.0000.00816.82
8.0.90.0040.00416.86
8.0.80.0140.00716.88
8.0.70.0040.00416.82
8.0.60.0040.00416.68
8.0.50.0040.00416.76
8.0.30.0080.00916.90
8.0.20.0110.00817.40
8.0.10.0000.00716.77
8.0.00.0140.00316.51
7.4.330.0030.00315.55
7.4.320.0000.00616.43
7.4.300.0060.00016.57
7.4.290.0000.00716.43
7.4.280.0040.00416.51
7.4.270.0000.00816.51
7.4.260.0000.00716.38
7.4.250.0000.00716.40
7.4.240.0030.00316.36
7.4.230.0000.00716.57
7.4.220.0080.00016.55
7.4.210.0040.01016.54
7.4.200.0000.00616.42
7.4.160.0090.00916.49
7.4.150.0070.01017.40
7.4.140.0090.01017.86
7.4.130.0140.00316.38
7.4.120.0120.00816.40
7.4.110.0100.00616.34
7.4.100.0030.01416.44
7.4.90.0070.01016.35
7.4.80.0130.01019.39
7.4.70.0110.00616.52
7.4.60.0030.01316.28
7.4.50.0090.00616.25
7.4.40.0120.00416.51
7.4.00.0060.00914.89
7.3.330.0000.00612.95
7.3.320.0000.00513.02
7.3.310.0020.00516.19
7.3.300.0070.00016.14
7.3.290.0040.01016.18
7.3.280.0080.00916.16
7.3.270.0100.00717.40
7.3.260.0120.01016.33
7.3.250.0100.01016.33
7.3.240.0130.00816.28
7.3.230.0130.00316.29
7.3.210.0060.01616.15
7.3.200.0090.00616.36
7.3.190.0090.00616.13
7.3.180.0080.00716.18
7.3.170.0000.01616.39
7.3.160.0160.00016.21
7.2.330.0100.01416.34
7.2.320.0130.00316.43
7.2.310.0100.00616.20
7.2.300.0100.00616.32
7.2.290.0100.00516.51
7.2.60.0040.01116.90
7.2.10.0220.01017.64
7.2.00.0140.01417.80
7.1.200.0070.00715.72
7.1.130.0160.01116.73
7.1.120.0180.00916.65
7.1.110.0180.01016.03
7.1.100.0370.01216.00
7.1.90.0240.00715.97
7.1.80.0260.00715.95
7.1.70.0200.01015.21
7.1.60.0300.01233.19
7.1.50.0320.01132.83
7.1.40.0330.00932.51
7.1.30.0350.00832.56
7.1.20.0270.01432.61
7.1.10.0180.00814.76
7.1.00.0220.01014.83

preferences:
74.51 ms | 401 KiB | 5 Q