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run code in 300+ PHP versions simultaneously
<?php $array = random_bytes(2048); for($u = 0; $u < 100; ++$u){ $result = str_repeat("\x00", 2048); $i = 0; for($x = 0; $x < 8; ++$x){ for($z = 0; $z < 16; ++$z){ $zx = (($z << 3) | $x); for($y = 0; $y < 8; ++$y){ $j = (($y << 8) | $zx); $j80 = ($j | 0x80); $i1 = ord($array{$j}); $i2 = ord($array{$j80}); $result{$i} = chr(($i2 << 4) | ($i1 & 0x0f)); $result{$i | 0x80} = chr(($i1 >> 4) | ($i2 & 0xf0)); $i++; } } $i += 128; } }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.13, 7.3.0 - 7.3.1

preferences:
75.39 ms | 402 KiB | 53 Q