I'm trying to encode my script using base64 in php, but why my code automatic adds backslashes \
at single quotes ' or double quotes "
this is the code I am using to encode
$encode = $_POST ['encode'];
$encod = base64_encode ($encode);
echo "<form action='?' method='post'><textarea name='encode'></textarea><input type='submit' value='Encode'></form><textarea> ".$encod." </textarea>";
I use code at above, then I try to encode this script:
echo "just test";
echo 'or just test';
and result
PD9waHAgZWNobyBcImp1c3QgdGVzdFwiOw0KZWNobyBcJ29yIGp1c3QgdGVzdFwnOyA/Pg==
when I decode, result
echo \"just test\";
echo \'or just test\';
how to delete backslashes??
I've tried using str_replace on $encod, and stripslashes($encod) but it does not work.
I have tried decoding your base64 encoded string and it yielded the same result. I tried encoding it again, slashes and all, and it yielded the same encoded string.
The problem is not that you are somehow getting unknown slashes out of the decoding process, but that the slashes exist there before you ever encoded the string.
The same string without slashes is this:
PD9waHAgZWNobyAianVzdCB0ZXN0IjsNCmVjaG8gJ29yIGp1c3QgdGVzdCc7ID8+
Try decoding it.
I believe that the real solution to your problem can be found here:
Why are $_POST variables getting escaped in PHP?
I believe the string you are encoding in base64 was already encoded in json (because the POST has to be done with a json string, I assume).
Json's way to escape the quotes is what you describe to be your problem:
See: json_encode PHP
So the solution here would be to first decode from base64 (base64_decode [PHP]) then decode from json (jsoN_decode() [PHP]) or (JSON.parse() [JS])
Related
I receive json answer from another script. Next I used $json = json_decode($json) and die(json['message']) for show specific string, and this value contains Cyrillic data.
Function mb_detect_encoding() shows that string in UTF-8.
Ok, I use charset="utf-8" in html file, but
I see this output "Пользователь с этим адресом электронной почты уже существует" in my browser.
I used mb_convert_encoding(json['message'], 'UTF-8'), without any effect/
Only var_dump($json) shows me decoded string.
Maybe I wrong to access data in json?
Use mb_convert_encoding(json['message'], "utf-8", "windows-1251"); to properly convert string.
I have a Persian text "سرما"
And then when I convert it to JSON using json_encode(), I get a series of escaped character codes such as \u0633 which seems to be expected and of a rational process. But my confusion lies where I don't know how to convert them back into readable string of characters. How should I do that in PHP?
Should I use anything of mb_* family? I also have checked json_encode() parameters and have found nothing appropriate for me.
UPDATE
what I get saved in my DB is:
["u0633u0631u0645u0627"]
Which shows the characters are not escaped properly. While if I change it to
["\u0633\u0631\u0645\u0627"] it becomes easily readable by json_decode()
They should be converted back on the other end when it's decoded. This is the safest option as it might not be possible to guaranteed that the transmission or storage will not corrupt a multi-byte encoding.
If you're certain that everything is safe for UTF8 end-to-end you can do:
$res = json_encode($foo, \JSON_UNESCAPED_UNICODE);
http://php.net/manual/en/function.json-encode.php
Maybe try encoding the unicode characters, and then json_encoding it, then on the other side (receiving JSON) decode the json, then decode the unicode.
Example:
//Encode
json_encode(utf8_encode($string));
//Decode
utf8_decode(json_decode($string));
its simple just use JSON_UNESCAPED_SLASHES atribute
your problem is't utf8 you need force JSON to don't escape Slashes
example
$bar = "سرما";
$res = json_encode($bar, JSON_UNESCAPED_SLASHES );
// $res equal to ["\u0633\u0631\u0645\u0627"]
if you check the result in your MYSQL Database
it happen when you did't Use addslashes()
example
$bar = "سرما";
$res = json_encode($bar, JSON_UNESCAPED_SLASHES );
$res = addslashes($res);
// $res equal to ["\\u0633\\u0631\\u0645\\u0627"] now it's ready to use in MYSQL
I've got a string that is in my database like 中华武魂 when I post my request to retrieve the data via my website I'm getting the data to the server in the format %E4%B8%AD%E5%8D%8E%E6%AD%A6%E9%AD%82
What decoding steps to I have to take in order to get it back to the usable form?
While also cleaning the user input to ensure they're not going to try an SQL injection attack?
(escape string before or after encoding?)
EDIT:
rawurldecode(); // returns "ä¸åŽæ¦é‚"
urldecode(); // returns "ä¸åŽæ¦é‚"
public function utf8_urldecode($str) {
$str = preg_replace("/%u([0-9a-f]{3,4})/i","&#x\\1;",urldecode($str));
return html_entity_decode($str,null,'UTF-8');
}
// returns "ä¸åŽæ¦é‚"
... which actually works when I try and use it in an SQL statement.
I think because I was doing an echo and die(); without specifying a header of UTF-8 (thus I guess that was reading to me as latin)
Thanks for the help!
When your data is actually that percent-encoded form, you just have to call rawurldecode:
$data = '%E4%B8%AD%E5%8D%8E%E6%AD%A6%E9%AD%82';
$str = rawurldecode($data);
This suffices as the data already is encoded in UTF-8: 中 (U+4E2D) is encoded with the byte sequence 0xE4B8AD in UTF-8 and that is encoded with %E4%B8%AD when using the percent-encoding.
That your output does not seem to be as expected is probably because the output is interpreted with the wrong character encoding, probably Windows-1252 instead of UTF-8. Because in Windows-1252, 0xE4 represents ä, 0xB8 represents ¸, 0xAD represents å, and so on. So make sure to specify the output character encoding properly.
Use PHP's urldecode:
http://php.net/manual/en/function.urldecode.php
You have choices here: urldecode or rawurldecode.
If you had encoded your string using urlencode, you must use urldecode because of the way spaces are handled. While urlencode converts spaces to +, it is not the same with rawurlencode.
I'm trying to decode a JSON feed containing some Cyrillic characters. Not all of the characters in the feed is Cyrillic though. I'm using json_decode which works fine for anything else, but return garbage when there are Cyrillic characters.
The results look like this: Деффачки
Any ideas?
Your page is being decoded as CP1252 when it's actually UTF-8. Set your headers properly.
>>> print u'Деффачки'.encode('cp1252').decode('utf-8')
Деффачки
if you can not decode unicode characters with json_decode, use addslashes() while using json_encode. The problem comes from unicode chars starting with \ such as \u30d7
$json_data = addslashes(json_encode($unicode_string_or_array));
hermanschutte Use the escape function when sending data through javascript
I want to convert a JSON object into a string. when I am using json_encode I get a string but all with hex letters. I want to convert it to a UTF-8. In other words I want to see the characters. How do I do it?
I was using json_encode to store data such as Arabic Characters in MySQL fields.
It would store the Arabic characters as HEX within the Database like this:
u0644 u063a...
Which is incorrect. You must ensure that you wrap your json_encode with mysql_escape_string().
This will make sure that the data is put in MySQL as:
\u0644\u063a...
Then, when you use json_decode, it converts the HEX strings into UTF-8 and is output correctly.
You can try passing an option to json_encode():
json_encode ( $value, JSON_UNESCAPED_UNICODE );
The JSON_UNESCAPED_UNICODE option is only available in PHP version 5.4.0 and later.
Thanks.
You can't, in PHP. Besides, the strings will still be the same once you decode them.
you are looking exactly for the funcition json_decode
it can convert json strings into utf8
here is an example of arabic word
$re = json_encode('لغة عربية');
echo $re ;
$dd = json_decode($re);
echo $dd ;
die;
it output :
"\u0644\u063a\u0629 \u0639\u0631\u0628\u064a\u0629"
لغة عربية
more examples here
http://php.net/manual/en/function.json-decode.php