3v4l.org

run code in 300+ PHP versions simultaneously
<?php function dechex_size($val, $size) { if ($size < 1) { error_log("Invalid value for $size"); return false; } $bits = $size << 2; if ($bits > log(PHP_INT_MAX, 2)) { return dechex($val); } $mask = 0; for ($i = 0; $i < $size; ++$i) { $mask = ($mask << 4) | 0xF; } $val &= $mask; return sprintf("%x", $val); } echo dechex_size(15,4), "\n"; // gives 000f echo dechex_size(-1,16), "\n"; // gives ffffffffffffffff echo dechex_size(-1,2), "\n"; // gives ff echo dechex_size(1025,2), "\n"; // gives ? (either 401, 01, ff, or false)

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)
8.3.60.0060.01218.23
8.3.50.0120.00318.23
8.3.40.0070.00718.72
8.3.30.0110.00418.67
8.3.20.0040.00420.46
8.3.10.0080.00020.48
8.3.00.0070.00023.65
8.2.180.0120.00616.50
8.2.170.0090.00622.96
8.2.160.0100.00720.57
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0040.00420.50
8.2.120.0020.00526.35
8.2.110.0060.00319.52
8.2.100.0080.00320.66
8.2.90.0000.01019.55
8.2.80.0000.00818.22
8.2.70.0000.00917.92
8.2.60.0040.00418.16
8.2.50.0080.00019.41
8.2.40.0080.00020.67
8.2.30.0030.00620.40
8.2.20.0070.00018.19
8.2.10.0000.00718.13
8.2.00.0000.00718.33
8.1.280.0140.00025.92
8.1.270.0080.00020.84
8.1.260.0040.00426.35
8.1.250.0000.00728.09
8.1.240.0090.00022.56
8.1.230.0040.00820.91
8.1.220.0000.00817.91
8.1.210.0030.00718.77
8.1.200.0040.00417.22
8.1.190.0080.00017.35
8.1.180.0000.00818.10
8.1.170.0040.00418.47
8.1.160.0040.00418.77
8.1.150.0040.00420.23
8.1.140.0040.00419.52
8.1.130.0000.00719.08
8.1.120.0050.00317.40
8.1.110.0000.00717.33
8.1.100.0000.00717.45
8.1.90.0070.00017.39
8.1.80.0030.00317.46
8.1.70.0000.00717.45
8.1.60.0000.00817.66
8.1.50.0070.00017.65
8.1.40.0000.00917.56
8.1.30.0030.00517.55
8.1.20.0000.00817.74
8.1.10.0040.00417.48
8.1.00.0040.00417.53
8.0.300.0040.00419.64
8.0.290.0040.00416.75
8.0.280.0030.00318.39
8.0.270.0000.00717.20
8.0.260.0000.00618.38
8.0.250.0030.00317.05
8.0.240.0040.00416.95
8.0.230.0000.00716.85
8.0.220.0040.00416.79
8.0.210.0030.00316.84
8.0.200.0060.00016.82
8.0.190.0030.00516.98
8.0.180.0040.00416.95
8.0.170.0040.00416.87
8.0.160.0030.00516.95
8.0.150.0040.00416.79
8.0.140.0000.00716.84
8.0.130.0060.00013.38
8.0.120.0060.00316.88
8.0.110.0000.00716.77
8.0.100.0080.00016.76
8.0.90.0070.00016.95
8.0.80.0100.00716.88
8.0.70.0030.00516.69
8.0.60.0040.00417.01
8.0.50.0050.00316.76
8.0.30.0080.01217.11
8.0.20.0140.01417.40
8.0.10.0000.00717.06
8.0.00.0120.00916.62
7.4.330.0000.00615.55
7.4.320.0040.00416.73
7.4.300.0030.00316.60
7.4.290.0020.00516.65
7.4.280.0000.00816.64
7.4.270.0000.00716.68
7.4.260.0030.00316.57
7.4.250.0030.00316.66
7.4.240.0030.00316.80
7.4.230.0030.00316.89
7.4.220.0030.01416.45
7.4.210.0120.00316.73
7.4.200.0050.00316.81
7.4.160.0070.00916.72
7.4.150.0040.01417.40
7.4.140.0070.01317.86
7.4.130.0110.01016.46
7.4.120.0100.01316.63
7.4.110.0070.01116.68
7.4.100.0150.00916.39
7.4.90.0120.00916.55
7.4.80.0150.00619.39
7.4.70.0110.01216.62
7.4.60.0120.00416.55
7.4.50.0130.00316.60
7.4.40.0030.01216.73
7.4.30.0070.01016.60
7.4.10.0040.01415.15
7.4.00.0060.01015.39
7.3.330.0030.00513.63
7.3.320.0050.00013.54
7.3.310.0030.00516.45
7.3.300.0030.00316.37
7.3.290.0110.00416.45
7.3.280.0090.00816.44
7.3.270.0100.00717.40
7.3.260.0100.00916.47
7.3.250.0120.00416.44
7.3.240.0050.01316.59
7.3.230.0040.01216.43
7.3.210.0100.00616.35
7.3.200.0100.00616.27
7.3.190.0130.00316.60
7.3.180.0070.00716.30
7.3.170.0090.00616.66
7.3.160.0170.00016.56
7.3.130.0030.01415.09
7.3.120.0030.01415.10
7.3.110.0060.01215.11
7.3.100.0040.01515.16
7.3.90.0090.00914.94
7.3.80.0110.00315.31
7.3.70.0090.00615.15
7.3.60.0000.00915.23
7.3.50.0120.00415.29
7.3.40.0060.00615.17
7.3.30.0090.00015.21
7.3.20.0030.00917.14
7.3.10.0030.00616.80
7.3.00.0000.01616.91
7.2.330.0140.00516.80
7.2.320.0030.01416.44
7.2.310.0130.00316.79
7.2.300.0120.00616.68
7.2.290.0110.00716.83
7.2.260.0040.01115.20
7.2.250.0020.01115.47
7.2.240.0070.01015.25
7.2.230.0030.01315.44
7.2.220.0000.01815.25
7.2.210.0000.01515.20
7.2.200.0100.00315.23
7.2.190.0090.00615.40
7.2.180.0060.01015.31
7.2.170.0110.00615.33
7.2.160.0100.00715.02
7.2.150.0030.01216.96
7.2.140.0070.00417.14
7.2.130.0030.01417.15
7.2.120.0040.01117.26
7.2.110.0070.00717.27
7.2.100.0120.00317.37
7.2.90.0030.00917.18
7.2.80.0110.00917.08
7.2.70.0000.01417.26
7.2.60.0050.00817.15
7.2.50.0130.00717.14
7.2.40.0060.00617.43
7.2.30.0040.00416.95
7.2.20.0000.01717.14
7.2.10.0060.00617.20
7.2.00.0000.00916.99
7.1.330.0000.01415.88
7.1.320.0070.00316.20
7.1.310.0070.00716.31
7.1.300.0030.00916.02
7.1.290.0000.01116.00
7.1.280.0060.00316.20
7.1.270.0080.00415.83
7.1.260.0070.00416.08
7.1.250.0130.00316.05
7.1.240.0040.00816.25
7.1.230.0060.00616.15
7.1.220.0060.00915.82
7.1.210.0120.00315.99
7.1.200.0060.00516.01
7.1.190.0040.00815.96
7.1.180.0030.00716.05
7.1.170.0100.00315.79
7.1.160.0070.00715.96
7.1.150.0030.01016.27
7.1.140.0030.01015.80
7.1.130.0070.00716.13
7.1.120.0060.00916.08
7.1.110.0040.00816.39
7.1.100.0000.01016.24
7.1.90.0030.01315.87
7.1.80.0030.01016.16
7.1.70.0050.00716.70
7.1.60.0040.00716.84
7.1.50.0080.00415.84
7.1.40.0090.00616.10
7.1.30.0000.00915.77
7.1.20.0240.02027.15
7.1.10.0070.04519.38
7.1.00.0080.04019.33
7.0.330.0080.00615.75
7.0.320.0100.00015.79
7.0.310.0070.00715.73
7.0.300.0060.00615.64
7.0.290.0070.00715.86
7.0.280.0000.00915.84
7.0.270.0040.00715.70
7.0.260.0060.00315.86
7.0.250.0060.00615.48
7.0.240.0040.00415.61
7.0.230.0060.00615.68
7.0.220.0070.00715.90
7.0.210.0100.00015.44
7.0.200.0060.00416.45
7.0.190.0060.00615.60
7.0.180.0030.00615.78
7.0.170.0000.01615.87
7.0.160.0080.04218.86
7.0.150.0130.03518.90
7.0.140.0100.04518.90
7.0.130.0170.02318.77
7.0.120.0080.03318.91
7.0.110.0110.03018.93
7.0.100.0080.03118.83
7.0.90.0080.03518.93
7.0.80.0050.03918.74
7.0.70.0080.03018.74
7.0.60.0100.03318.63
7.0.50.0120.03618.83
7.0.40.0120.03717.96
7.0.30.0100.03317.90
7.0.20.0430.02816.94
7.0.10.0730.04316.91
7.0.00.0670.04416.94
5.6.400.0070.00414.79
5.6.390.0000.01314.84
5.6.380.0030.01014.42
5.6.370.0100.00714.82
5.6.360.0030.00914.71
5.6.350.0000.00814.48
5.6.340.0030.01014.61
5.6.330.0040.00414.70
5.6.320.0030.01314.68
5.6.310.0000.01014.70
5.6.300.0040.00714.80
5.6.290.0090.00614.77
5.6.280.0070.00314.79
5.6.270.0100.00315.05
5.6.260.0000.00914.73
5.6.250.0030.01214.83
5.6.240.0000.01414.73
5.6.230.0070.00414.88
5.6.220.0070.00414.70
5.6.210.0080.00614.61
5.6.200.0070.00714.71
5.6.190.0040.01414.61
5.6.180.0100.00614.78
5.6.170.0060.00914.82
5.6.160.0040.01214.90
5.6.150.0030.01014.54
5.6.140.0100.00714.47
5.6.130.0100.00314.73
5.6.120.0030.00614.52
5.6.110.0030.00614.40
5.6.100.0030.00914.89
5.6.90.0040.00414.37
5.6.80.0030.01014.73
5.6.70.0100.00314.59
5.6.60.0090.00614.69
5.6.50.0070.00714.61
5.6.40.0060.00314.55
5.6.30.0000.01414.59
5.6.20.0070.00714.90
5.6.10.0030.01014.42
5.6.00.0070.00714.51

preferences:
61.24 ms | 401 KiB | 5 Q