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<?php function string_shift_left($input, $inputlen, $bits, &$output = null) { $skip = (int) ($bits / 8); $copylen = (int) ($inputlen - $skip); $offset = 8 - ($bits % 8); $mask = 0xff >> $offset; $output = str_pad('', $inputlen + 1, "\x00"); var_dump($skip, $copylen, $offset, $mask, $output); if ($offset == 8) { /* 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++) { $output[$i] = chr((ord($input[$i + $skip]) << $offset) | (ord($input[$i + $skip + 1]) & $mask)); } } string_shift_left("\x01", 1, 3, $output); for ($i = 0; $i < strlen($output); $i++) { printf('%08b', ord($output[$i])); }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(0) int(1) int(5) int(7) string(2) "" Warning: Uninitialized string offset 1 in /in/2Obvj on line 23 0010000000000000
Output for 5.2.10 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
int(0) int(1) int(5) int(7) string(2) "" Notice: Uninitialized string offset: 1 in /in/2Obvj on line 23 0010000000000000
Output for 7.3.32 - 7.3.33, 7.4.26
int(0) int(1) int(5) int(7) string(2) "" 0010000000000000
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.9
int(0) int(1) int(5) int(7) string(2) "" Notice: Uninitialized string offset: 1 in /in/2Obvj on line 23 0010000000000000
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '=', expecting ')' in /in/2Obvj on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected '=', expecting ')' in /in/2Obvj on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/2Obvj on line 3
Process exited with code 255.
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286.97 ms | 401 KiB | 384 Q