javascript - Using PHP to retrieve a PDF (with JSON) -

i'm using js , php collect rows of information mysql db. working fine until i'm adding code pdf-blob in same return.

var docs;    getmini = function() {    showminiloading();    var req = new xmlhttprequest();    req.onload = function() {      console.log("got it!");      var temp = json.parse(this.responsetext);      docs = temp;      hideminiloading();      printallmini();    };    req.open("get", "resources/php/newmini.php", true);    req.send();    console.log("sent!");  }    showpdf = function(id) {    (var = 0; < docs.length; i++) {      var object = docs[i];      if (object.id == id) {        console.log("found it! :d " + i);        console.log("content: " + object.pdf);        // more stuff here        document.getelementbyid("pdf").innerhtml = '<object "data:application/pdf,' + object.pdf + '" type="application/pdf" width="100%" height="100%"> <p>alternative text - include link <a href="http://fzs.sve-mo.ba/sites/default/files/dokumenti-vijesti/sample.pdf">to pdf!</a></p> </object>';        break;      }    }  }

<?php     session_start();     include_once 'maindb.php';     $mysqli = mysqli_connect($dbmain['host'], $dbmain['user'], $dbmain['pass'],     $dbmain['db'])     or die('kunde inte ansluta till databasen:'.mysqli_error($maincon));      if(!$result = $mysqli->query(     "select tbldokument.id, tblmail.inkommet,     tbldokument.datum, tbldokument.moms, tbldokument.pris, tbldokument.org,     tblverifikat.verifikatno, tbllevmallar.orgnr, tbllevmallar.name,     tbldokumentsvg.svg, tbldokumentpdf.pdf     tbldokument     left outer join tblverifikat on tbldokument.id = tblverifikat.id     left outer join tblmail on tbldokument.tblmail_id = tblmail.id     left outer join tbllevmallar on tbldokument.orgnr = tbllevmallar.orgnr     left outer join tbldokumentsvg on tbldokument.id = tbldokumentsvg.dokumentid     left outer join tbldokumentpdf on tbldokument.id = tbldokumentpdf.id     tblverifikat.verifikatno <> 'makulerad'     order tbldokument.id"))     {         echo "verything bad";     }     else {         $i = 0;         while ($row = $result->fetch_assoc()) {          $temppdf = $row["pdf"];         $size = filesize($temppdf);         header('content-type: application/pdf');         header("content-length: $size");         header('content-disposition: attachment; filename="new.pdf")');         $temparray[$i] = array(         "id" => $row["id"],         "arrived" => substr($row["inkommet"], 0, 10),         "booked" => $row["datum"],         "verification" => $row["verifikatno"],         "org" => $row["name"],         "price" => $row["pris"],         "stax" => $row["moms"],         "pic" => base64_encode($row["svg"]),         "pdf" => $temppdf);         $i++;         }     // header stuff     $done = json_encode($temparray);     $size = strlen($done);     header('content-type: application/json');     header("content-length: $size");     header('connection: close');     echo $done; } $result->close(); $mysqli->close(); ?> 

i encode result json @ end, whatever end column full of null-values, instead of desired pdf-blob. i've tried encode entire pdf base64_encode(), error says:

uncaught syntaxerror: unexpected token <

.. in console of browser.

actual question: how send pdf-blob other information , encoded in json?

i've tried lot of other threads haven't seen solution works in case :/

note: php , additional feedback efficiency of code above highly appreciated.