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run code in 150+ php & hhvm versions
Bugs & Features
<?php function string_shift_left($input, $inputlen, $bits, &$output = null) { $skip = (int) ($bits / 8); $copylen = (int) ($inputlen - $skip); $offset = $bits % 8; $mask = (0xff >> $offset) << (8 - $offset); $output = str_pad('', $inputlen + 1, "\x00"); var_dump($skip, $copylen, $offset, $mask, $output); if ($offset == 0) { /* Shifting multiples of 8 allows us to simply copy the relevant bytes */ for ($i = 0; $i < $copylen; $i++) { $output[$i] = $input[$i + $skip]; } return; } for ($i = 0; $i < $copylen; $i++) { $left = (ord($input[$i + $skip]) << $offset); $right = (ord($input[$i + $skip + 1]) & $mask) >> $offset; printf("%08b|%08b\n", $left, $right); $output[$i] = chr($left | $right); } } //0b000100010001000100000000; string_shift_left("\x11\x11\x00", 2, 3, $output); for ($i = 0; $i < strlen($output); $i++) { printf('%08b|', ord($output[$i])); }
Output for 5.0.0 - 7.1.0
int(0) int(2) int(3) int(992) string(3) "" 10001000|00000000 10001000|00000000 10001000|10001000|00000000|
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '=', expecting ')' in /in/Uf2K0 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '=', expecting ')' in /in/Uf2K0 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/Uf2K0 on line 3
Process exited with code 255.