note 80208 added to function.rawurldecode

Hi everybody =) My name is Javier and I'm from Argentina. I've had a little issue with latin characters like ñ","Ñ","á","é","í", etc. They are not decoded with rawurlencode(), so I've made this: <?php function urlRawDecode($raw_url_encoded) { # Hex conversion table $hex_table = array( 0 => 0x00, 1 => 0x01, 2 => 0x02, 3 => 0x03, 4 => 0x04, 5 => 0x05, 6 => 0x06, 7 => 0x07, 8 => 0x08, 9 => 0x09, "A"=> 0x0a, "B"=> 0x0b, "C"=> 0x0c, "D"=> 0x0d, "E"=> 0x0e, "F"=> 0x0f ); # Fixin' latin character problem if(preg_match_all("/\%C3\%([A-Z0-9]{2})/i", $raw_url_encoded,$res)) { $res = array_unique($res = $res[1]); $arr_unicoded = array(); foreach($res as $key => $value){ $arr_unicoded[] = chr( (0xc0 | ($hex_table[substr($value,0,1)]<<4)) | (0x03 & $hex_table[substr($value,1,1)]) ); $res[$key] = "%C3%" . $value; } $raw_url_encoded = str_replace( $res, $arr_unicoded, $raw_url_encoded ); } # Return decoded raw url encoded data return rawurldecode($raw_url_encoded); } print urlRawDecode("%C3%A1%C3%B1"); // output: // áñ ?> For example, you have the character "ñ" encoded like this "%C3%B1". This is nothing more and nothing less than 0xc3 and 0xb1, they are binary numbers, (HHHH LLLL, where HHHH=High and LLLL=Low). 0xc3 = 1100 0011 (binary 8 bit word), 0xb1 = 1011 0001 (binary 8 bit word), To convert a raw encoded character to ascii we have to make boolean operations between this two operands (0xc3 and 0xb1), boolean algebra were defined by George Boole, we need to use them here. The first one we going to use is the logical OR ("|" or "pipe") and logical AND ("&" or "and person"). A logical OR implies the following truth table: a b (a OR b) 0 0 0 0 1 1 (a OR b or Both, a and b, must be true to get a true result) 1 0 1 1 1 1 A logical AND implies the following truth table: a b (a AND b) 0 0 0 0 1 0 1 0 0 1 1 1 (Both a AND b, must be true to get a true result) So, here we have to make a logical OR with both 0xc3 and 0xb1 HIGH nibble, a nibble is a half byte (4 bits), so we have to make a logical OR between 1100 (0xc) and 1011 (0xb), we going to get this: 1111 (0xf), then we have to make a logical AND between both LOW nibble, 0011 (0x3) and 0001 (0x1), we going to get this: 0001, so, if we want to see the final result, we have to put HIGH and LOW nibble on his Byte position, like this: 1111 0001 (0xf1) and that is nothing more and nothing less than "ñ" (to check this out, try the following: print(chr(0xf1));). This "<<" is a logical shift left, if we have this binary number 0001 (1) and we make this: 0001 << 2 we'll get 0100 (4) right bits are filled with 0's. <?php # Conversion example %C3%B1 to ASCII (0x71) print( chr( (0xc0|0x0b<<4) | (0x03&0x01) ) ); // Output will be: // ñ // 1100 0000 OR 1011 0000 = 1111 0000 (0xf0) // 0000 0011 AND 0000 0001 = 0000 0001 (0x01) // 1111 0000 OR 0000 0001 = 1111 0001 (0xf1) ?> PS: I'm so sorry about my english, I know, is horrible :P ---- Server IP: 190.2.55.3 Probable Submitter: 190.51.106.50 ---- Manual Page -- http://www.php.net/manual/en/function.rawurldecode.php Edit -- https://master.php.net/note/edit/80208 Del: integrated -- https://master.php.net/note/delete/80208/integrated Del: useless -- https://master.php.net/note/delete/80208/useless Del: bad code -- https://master.php.net/note/delete/80208/bad+code Del: spam -- https://master.php.net/note/delete/80208/spam Del: non-english -- https://master.php.net/note/delete/80208/non-english Del: in docs -- https://master.php.net/note/delete/80208/in+docs Del: other reasons-- https://master.php.net/note/delete/80208 Reject -- https://master.php.net/note/reject/80208 Search -- https://master.php.net/manage/user-notes.php