title: Json_decode returning Null and Error 4
body: <p>I'm getting null when I decode my Json. $contactInfo is a String from Java(Android) pushed via Volley. I did check the string, it is a string.</p>
  
  <p>I have tried the following</p>
  
  <p>1) Make the $contactInfo with one user's contact only </p>
  
  <p>2) Removed spaces</p>
  
  <p>3) Remove special characters like  ♡</p>
  
  <p>4) Remove +</p>
  
  <p><strong>The closest solution I can find to reading such [[data,data],[data,data]] is to use json decode. Is there any other way for me to read this into a array or json?</strong></p>
  
  <pre><code>$contactInfo = "[[john qiu, +16266169643], [Vince, +65 5888 8447]]"
  $obj = stripslashes($contactInfo);
  $obj = json_decode($obj);
  echo json_last_error(); 
  </code></pre>
  
  <p>echo is returning JSON_ERROR_SYNTAX</p>
  
  <p>contactInfo, for some users , there are special characters like "♡" </p>