I am using a Yii2 model that is hooked to a PostgresQL database. I have a behavior that encodes and decodes certain attributes of this model to/from json. To encode/decode, I am using the Json helper, the Json::encode and Json::decode methods.
The column in the table is of a json type. An example of what ends up in the database:
"{\"additional_tags\":[\"#здрасте\",\"#кафе\"],\"vk\":\"vk.com\\\/privetik\"}"
When I try to decode it back into a php array, here's what's returned instead:
'{"additional_tags":["#здрасте","#кафе"],"vk":"vk.com\/privetik"}'
EDIT: Come to think of it, the string seems fine, but the behavior of the ::decode method is strange. Essentially, all it does is remove the escape slashes, instead of converting it into a php array or throwing an exception.
What should I do to fix this? Appreciate any feedback.
Looks like the string in your database is encoded twice. Try passing it through Json::decode another time, I bet it will return your array.
Related
I import data from WordPress. It is a WebDirectory 2.0 that saves the data as a "strange" string in a database.
Example:
s:95:"a:2:{s:3:"url";s:39:"http://www.google.com/";s:4:"text";s:13:"Website";}";
I have tried json_decode() and unserialize(). Both do not work. They return the string as it is. I can see, this is an array with two values, but how this can be parsed in PHP? In what format this string can be?
If you have this:
echo serialize(serialize(['url'=>'http://www.google.com/','text'=>'Website']));
The output will be
s:71:"a:2:{s:3:"url";s:22:"http://www.google.com/";s:4:"text";s:7:"Website";}";
But what you have is
s:95:"a:2:{s:3:"url";s:39:"http://www.google.com/";s:4:"text";s:13:"Website";}";
Which is different. See, s:95 != s:71, among other elements.
Or this is not a real data or by some reason it's generating extra chars, and causing the problem. I would check how the encoding from both PHP and database to see if all matches.
I have this value under Items in my DB:
a:1:{i:0;a:9:{s:12:"model_number";s:10:"TT1-W";s:5:"price";s:4:"3810";s:10:"unit_price";d:3135.6300000000001091393642127513885498046875;s:8:"id_price";d:3810;s:9:"sales_tax";d:290.3700000000000045474735088646411895751953125;s:5:"sales";d:3084.6300000000001091393642127513885498046875;s:7:"service";s:2:"51";s:7:"freight";s:3:"384";s:13:"co_cat";s:3:"X4";}}
Making it more reader-friendly:
a:1:
{
i:0;
a:9:
{
s:12:"model_number";
s:10:"TT1-W";
s:5:"price";
s:4:"3810";
s:10:"unit_price";
d:3135.6300000000001091393642127513885498046875;
s:8:"id_price";
d:3810;
s:9:"sales_tax";
d:290.3700000000000045474735088646411895751953125;
s:5:"sales";
d:3084.6300000000001091393642127513885498046875;
s:7:"service";
s:2:"51";
s:7:"freight";
s:3:"384";
s:13:"co_cat";
s:3:"X4";
}
}
I am unable to find out how to decode this string since it can not seem to find reference to it in the php code that displays it on the page. It looks to me to be JSON but i can not seem to find a "standard" format for the above in order to start figuring out where it starts and where it ends.
I am needing this to be decoding using ASP.net. But then again, i need to figure out what it is before i can start decoding it!
Any help to what it is would be great!
Try with unserialize:
function.unserialize
EDIT: If you can use C# libraries:
How to unserialize PHP Serialized array/variable/class and return suitable object in C#
EDIT2:
Visual Studio Tip: Three ways to use C# within a VB.NET project
EDIT3:
i need to figure out what it is
It's standard PHP-solution to store (and restore) arrays and objects (and other types, see manual) in strings.
That appears to be PHP's serialization methodology. You just need to use PHP's unserialize() on it.
This looks a serialized object. PHP's unserialize is probably what you want:
unserialize() takes a single serialized variable and converts it back
into a PHP value.
There is no built in way to turn that into an ASP.Net object, but it is a regular format, so you can build your own parser to create a simple dictionary representation of the attributes of that particular structure.
But if you're trying to de-serialize a PHP object in ASP.Net you're probably doing something wrong!
I have my data stored in a JSON string like these...
a:1:{s:15:"s2member_level1";s:1:"1";}
How can i read this values in mysql?
I need to know if the value "s2member_level1" is 1.
Thanks!!!
That's not JSON but a string resulted from calling serialize() in PHP. You cannot parse it easily in MySQL. If you can use PHP, use the unserialize function:
$obj = unserialize($data_from_mysql);
if ($obj['s2member_level1'] == 1) {
// more code here
}
You can convert data to JSON in PHP using the json_encode function. In a similar way, you construct an object from a JSON string using json_decode.
#Lekensteyn is correct, but you could do a like statement, although its performance would most likely be very poor. My true answer is to change how you store this information to take advantages of best performing queries.
select * from table
where column like '%s:15:"s2member_level1";s:1:"1";%';
#Lekensteyn is right about the type of this particular String, but for others, PHP has json_decode which you can use to convert a JSON object to a PHP object. It would be considerably more difficult to read such an object using MySQL only.
This is no json, but serialized data. It was probably serialized with the 'serialize' function of PHP. Try:
print_r(unserialize('a:1:{s:15:"s2member_level1";s:1:"1";}'));
... to unserialize it.
Hey can anyone tell me what datatype this is? it wont parse as i've stripped out sensitive data. Am I correct in thinking its json?
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News";s:11:"autopublish";s:2:"on";s:5:"draft";N;s:6:"poster";s:1:"1";s:6:"suffix";s:0:"";}
This is a serialized PHP array. Essentially, it's just a string that represents a PHP array (the a at the beginning marks it as an array).
You can get the PHP array back out of it by passing the string to the PHP function unserialize().
That is serialized data - not Wordpress specific.
Take a look into serialize(), unserialize() and OOP serialization: __sleep()/__wakeUp().
I'm trying to store a complex object here and am doing that by serialising the object running a mysql_real_escape_string on it and inserting it into a mysql database.
However when I retrieve it running a sql query - I'm using Zend frameworks Zend_DB_Table here but anyway - and when I try to stripslashes and unserialize I dont get my object back. I've tried to just unserialize without stripping slashes and all but nothings working.
UPDATE
This is weird. I made a simple page which just unserializes a serialised object. If I take the serialized string as it is retrieved from the database and unserialize it via this other page which just has an unserialize() on it - it works perfectly and I get my object back. However in the code where ironically I'm retriving the string and I run the exact same unserialize option there ,its not working!
So basically there is nothing wrong with the serialized string - for some weird reason it won't unserialize it in my application but it unserializes somewhere else, it makes no sense.
You probably need to run it through base64 encoding first:
$safe_string_to_store = base64_encode(serialize($data));
Then to get it back out:
$date = unserialize(base64_decode($safe_string_to_store));
Try that and let us know if it works.
(and dont run stripslashes on it - there is no need to)
You shouldn't run stripslashes on it - the database will give you back the right string to put into unserialize.
Make sure you have notices turned on and echo the string before you unserialize it - does it look right?
You should be able to just do the following:
Assuming MyTable is your instance of Zend_Db_Table_Abstract:
$t = new MyTable();
$n = $t->createRow();
$n->serializedfield = serialize($data);
$n->save();
and let Zend DB take care of the escaping for you.
If you're doing it via an insert(), you shouldnt need to do anything either (the above uses insert())
Otherwise use $db->quoteInto() like
$db->quoteInto('INSERT INTO mytable (serializedfield) values (?)', serialize($data));
I strongly recommend you to use json_encode instead of serialize. Some day you will find yourself trying to use that data from another place that is not PHP and having it stored in JSON makes it readable everywhere; virtually every language supports decoding JSON and is a well stablished standard. And is even worse if you base64 it, you also make the serialized content unreadable from your database console client.