json decode returns NULL after webservice call

Question

There is a strange behaviour with json encode and json decode and I can t find a solution   My php application calls a php web service  The webservice returns json that looks like this    var dump  foo   string 62     action   set   user   123123123123   status   OK      now I like to decode the json in my application    data   json decode  foo  true    but it returns NULL   var dump  data   NULL   I use php5   The Content-Type of the response from the webservice   text html  charset utf-8   also tried to use  application json  charset utf-8    What could be the reason

User · Answer

Try using json encode on the string prior to using json decode    idk if will work for you but it did for me    I m using laravel 4 ajaxing through a route param    username     username  john    public function getAjaxSearchName  username         username   json encode  username       die var dump json decode  username  true

User · Answer

I just put this   result   mb convert encoding  result  UTF-8   UTF-8          result   json decode  result     and it s working

User · Answer

In Notepad    select Encoding  from the top menu  and then ensure that  Encode in UTF-8  is selected   This will display any characters that shouldn t be in your json that would cause json decode to fail

User · Answer

None of the solutions above worked for me  but html entity decode  json string  did the trick

User · Answer

Yesterday I spent 2 hours on checking and fixing that error finally I found that in JSON string that I wanted to decode were     slashes  So the logical thing to do is to use stripslashes function or something similiar to different PL   Of course the best way is sill to print this var out and see what it becomes after json decode  if it is null you can also use json last error   function to determine the error it will return integer but here are those int described   0   JSON ERROR NONE  1   JSON ERROR DEPTH  2   JSON ERROR STATE MISMATCH  3   JSON ERROR CTRL CHAR  4   JSON ERROR SYNTAX  5   JSON ERROR UTF8  In my case I got output of json last error   as number 4 so it is JSON ERROR SYNTAX  Then I went and take a look into the string it self which I wanted to convert and it had in last line      title   error        After that is really just an easy fix    json   json decode stripslashes  response    if  json last error      0       you ve got an object in  json

User · Answer

i had a similar problem  got it to work after adding     single quotes  around the json encode string  Following from my js file   var myJsVar     lt  php echo json encode  var     gt       ------- gt  NOT WORKING   var myJsVar     lt  php echo json encode  var     gt        ------- gt  WORKING   just thought of posting it in case someone stumbles upon this post like me

User · Answer

Maybe you use thing as       these chars should be quoted

User · Answer

action   set   user   123123123123   status   OK      This little apostrophe in the beginning - what is it  First symbol after the doublequote

User · Answer

make sure that if you sent the data by POST   GET   the server has not escape the quotes   my array   json decode str replace             json string   true

User · Answer

Try this   foo   utf8 encode  foo    data   json decode  foo  true

User · Answer

I had the similar problem in  a live site  In my local site it was working fine  For fixing the same I Just have added the below code   json decode stripslashes   GET  arr

User · Answer

Non of these solutions worked for me  What DID eventually work was checking the string encoding by saving it to a local file and opening with Notepad    I found out it was  UTF-16   so I was able to convert it this way    str   mb convert encoding  str  UTF-8   UTF-16

User · Answer

Well  i had a similar issue and the problems was the PHP magic quotes in the server    here is  my solution   if get magic quotes gpc        param   stripslashes   POST  param      else     param     POST  param       param   json decode  param true

User · Answer

You should try out json last error msg    It will give you the error message and tell you what is wrong  It was introduced in PHP 5 5    foo      action   set   user   123123123123   status   OK      data   json decode  foo  true   if  data    null        throw new Exception  Decoding JSON failed with the following message                                   json last error msg               JSON decode was good   gt  Let s use the data

User · Answer

Check the encoding of your file  I was using netbeans and had to use iso windows 1252 encoding for an old project and netbeans was using this encoding since then for every new file  json decode will then return NULL  Saving the file again with UTF-8 encoding solved the problem for me

User · Answer

Print the last json error when debugging    json decode   so  true  9     json errors   array      JSON ERROR NONE     No error has occurred       JSON ERROR DEPTH     The maximum stack depth has been exceeded       JSON ERROR CTRL CHAR     Control character error  possibly incorrectly encoded       JSON ERROR SYNTAX     Syntax error       echo  Last error       json errors json last error     PHP EOL  PHP EOL   Also use the json stringify   function to double check your JSON syntax

User · Answer

I don t know Why   But this work    out   curl exec  curl        out   utf8 encode  out        out   str replace           out   if  substr  out 1 1              out   substr  out 3          arResult  questions     json decode  out true     without utf8 encode   - Don t work

User · Answer

I had such problem with storage json-string in MySQL   Don t really know why  but using htmlspecialchars decode berofe json decode resolved problem

User · Answer

EDIT  Just did some quick inspection of the string provided by the OP  The small  character  in front of the curly brace is a UTF-8 B yte  O rder  M ark  0xEF 0xBB 0xBF  I don t know why this byte sequence is displayed as   here   Essentially the system you aquire the data from sends it encoded in UTF-8 with a BOM preceding the data   You should remove the first three bytes from the string before you throw it into json decode    a substr  string  3  will do    string 62      action   set   user   123123123123   status   OK                                            This is the UTF-8 BOM   As Kuroki Kaze discovered  this character surely is the reason why json decode fails  The string in its given form is not correctly a JSON formated structure  see RFC 4627

User · Answer

I was having this problem  when I was calling a soap method to obtain my data  and then return a json string  when I tried to do json decode I just keep getting null   Since I was using nusoap to do the soap call I tried to just return json string and now I could do a json decode  since I really neaded to get my data with a SOAP call  what I did was add ob start   before include nusoap  id did my call genereate json string  and then before returning my json string I did ob end clean    and GOT MY PROBLEM FIXED     EXAMPLE    HRT - SIGNED   20130116   verifica se um num assoc deco    valido ob start    require   nusoap php     aResponse  SimpleIsMemberResult    IsMember     FALSE  if  empty  iNumAssociadoTmp         try                client   new soapclientNusoap PartnerService svc wsdl            array                  OPTS               trace    gt  0               exceptions    gt  false               cache wsdl    gt  WSDL CACHE NONE                             MENSAGEM A ENVIAR      sMensagem1              lt SimpleIsMember gt               lt request gt                   lt CheckDigit gt    iCheckDigitAssociado   lt  CheckDigit gt                   lt Country gt Portugal lt  Country gt                   lt MemberNumber  gt    iNumAssociadoDeco   lt  MemberNumber gt               lt  request gt           lt  SimpleIsMember gt         aResponse    client- gt call  SimpleIsMember   sMensagem1        aData   array  dados   gt  aResponse- gt xpto   success   gt  aResponse- gt example           ob end clean    return json encode  aData

[php] json_decode returns NULL after webservice call

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