3v4l.org

run code in 300+ PHP versions simultaneously
<?php $score = 64; $firstName = 'Jack'; $lastName = 'Saliv'; $age = 21; $expected = 'FFFEFF404A00610063006B00530061006C00690076FFFEFF15'; $expectedCorrected = 'FFFEFF404A00610063006B00530061006C0069007600FFFEFF15'; // Convert to UTF-16LE and get hex, https://stackoverflow.com/a/16080439/231316 $nameAsUtf16LE = unpack('H*', mb_convert_encoding($firstName.$lastName, 'UTF-16LE', 'UTF-8')); // UTF-16LE BOM $utf16LeBom = 'FFFE'; // Convert to hex strings $scoreAsHex = dechex($score); $ageAsHex = dechex($age); $finalString = sprintf( '%1$s%2$s%3$s', $utf16LeBom.$scoreAsHex, strtoupper($nameAsUtf16LE[1]), // This is 1-based, not 0-based $utf16LeBom.$ageAsHex, ); $numberPadding = 'FF'; $finalStringWithNumbersPadded = sprintf( '%1$s%2$s%3$s', $utf16LeBom.$numberPadding.$scoreAsHex, strtoupper($nameAsUtf16LE[1]), // This is 1-based, not 0-based $utf16LeBom.$numberPadding.$ageAsHex, ); echo 'Calculated : '.$finalString; echo PHP_EOL; echo 'Padded : '.$finalStringWithNumbersPadded; echo PHP_EOL; echo 'Expected : '.$expected; echo PHP_EOL; echo 'Expected Corrected : '.$expectedCorrected; assert($finalStringWithNumbersPadded === $expectedCorrected);

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)
8.4.120.0120.00824.05
8.4.110.0140.00718.87
8.4.100.0140.00618.82
8.4.90.0050.00420.79
8.4.80.0120.00718.63
8.4.70.0100.00619.48
8.4.60.0100.00618.68
8.4.50.0040.00420.54
8.4.40.0040.01520.51
8.4.30.0160.00323.91
8.4.20.0120.00919.85
8.4.10.0160.00322.15
8.3.250.0070.00619.00
8.3.240.0040.00516.64
8.3.230.0170.00416.50
8.3.220.0060.00219.16
8.3.210.0040.00418.46
8.3.200.0140.00316.59
8.3.190.0090.00617.30
8.3.180.0090.01116.69
8.3.170.0090.00917.05
8.3.160.0110.00718.74
8.3.150.0080.00016.77
8.3.140.0140.00016.60
8.3.130.0040.00416.72
8.3.120.0060.00320.54
8.3.110.0150.00320.94
8.3.100.0060.00324.06
8.3.90.0030.00526.77
8.3.80.0030.00617.97
8.3.70.0110.01116.50
8.3.60.0100.00716.36
8.3.50.0060.01516.35
8.3.40.0140.00023.65
8.3.30.0070.00718.86
8.3.20.0070.00024.18
8.3.10.0040.00424.66
8.3.00.0030.00626.16
8.2.290.0060.00320.67
8.2.280.0130.00618.65
8.2.270.0080.01117.25
8.2.260.0080.00016.43
8.2.250.0040.00418.38
8.2.240.0000.00918.95
8.2.230.0030.00622.58
8.2.220.0070.00337.54
8.2.210.0080.00826.77
8.2.200.0030.00616.50
8.2.190.0090.01216.58
8.2.180.0170.00316.50
8.2.170.0180.00322.96
8.2.160.0110.00422.96
8.2.150.0040.00425.66
8.2.140.0000.00824.66
8.2.130.0070.00026.16
8.2.120.0000.00926.16
8.2.110.0070.00322.29
8.2.100.0070.00320.43
8.2.60.0120.00418.06
8.1.330.0100.00416.32
8.1.320.0220.00716.34
8.1.310.0060.00918.64
8.1.300.0120.00917.96
8.1.290.0060.00330.84
8.1.280.0100.00725.92
8.1.270.0000.00824.66
8.1.260.0050.00226.35
8.1.250.0030.00528.09
8.1.240.0070.00320.28
8.1.230.0030.00618.68
7.3.250.0050.00616.52
7.3.00.0060.00617.77
7.2.340.0140.00016.52
7.1.260.0080.00416.65
7.0.00.0040.00516.54
5.6.400.0070.00416.52

preferences:
62.86 ms | 403 KiB | 5 Q