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<?php function txt2bin($txt) { $bin = ''; for($i = 0, $l = strlen($txt); $i < $l; $i++) { $bin .= sprintf('%08b', ord(substr($txt, $i, 1))); } return $bin; } function bin2txt($bin) { $split = str_split($bin, 8); $txt = ''; for($i = 0, $l = count($split); $i < $l; $i++) { $txt .= chr(bindec($split[$i])); } return $txt; } echo txt2bin('Hello world!'); echo "\n"; echo bin2txt('010010000110010101101100011011000110111100100000011101110110111101110010011011000110010000100001');
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