title: Facebook graph: Batch parameter must be a JSON array
body: <p>Yesterday my script was working fine to do batch requests.</p>
  
  <p>Today for any reason, it's not working...</p>
  
  <p>I have this error:</p>
  
  <p>"GraphBatchException: Batch parameter must be a JSON"</p>
  
  <p>When I check my logs I have this:</p>
  
  <pre><code>$urlPost="?batch=[{"method":"POST","body":"message=100+rembours%C3%A9+sur+votre+1er+pari+%3A+http%3A%2F%2Fbit.ly%2Fbonus514%0D%0A","relative_url":"%2F285944461555097%2Fphotos%3Fpublished%3Dfalse%26url%3Dhttps%3A%2F%2Ffbcdn-sphotos-e-a.akamaihd.net%2Fhphotos-ak-xpa1%2Ft1.0-9%2F10517958_336601306489412_5656239420132644534_n.png%26scheduled_publish_time%3D1405873800%26access_token%3Dxxx";
  </code></pre>
  
  <p>So I don't see what's wrong as it was working yesterday. Any idea?</p>