使用json_decode（）获取null

I'm attempting to update records through decoded JSON by ID in this CakePHP function:

public function update() {
    $this->layout = 'ajax';
    if($this->request->is('post')) {
        $decoded = json_decode($this->request->data,true);
        if($data = $this->Foobar->save($decoded)) {
            $data = json_encode(array(
                "message" => "Foobar successfully updated.",
                "update" => $this->request->data
            ));
        } else {
            $data = json_encode(array(
                "message" => "Foobar could not be updated.",
                "update" => $decoded,
                "updateJson" => $this->request->data
            ));
        }
    } else {
        $data = json_encode(array(
            "message" => "Method should be post."
        ));
    }
    $this->set('data', $data);

But the decode keeps returning null:

{"message":"Foobar could not be updated.","update":null,"updateJson":{"ID":"1","status":2}}

However, if I go to http://www.compileonline.com/execute_php_online.php and enter:

<html><head></head><body>
<pre>
<?php
   print_r(json_decode('{"ID":"1","status":2}', true));
?>
</pre>
</body></html>

It works just fine...

Looking at related questions...

  • I've seen suggestions to try json_last_error(), this returns 0 for me.
  • I've seen someone mention magic_quotes might be on, mine are off.
  • I've seen suggestions to use json_decode(utf8_encode($this->request->data),true);, this still returns null for me

Any ideas?

I don't think you should JSON Decode the data.

Try to directly save:

$data = $this->Foobar->save($this->request->data);