PHP json_encode(): why does encoded non-associative array return an empty string?

Question

I'm experiencing a problem when trying to json_encode() a non-associative array in PHP:

echo json_encode(array(array(1,1), array(1,1)), JSON_FORCE_OBJECT) ;
// Non-associative array output as object: {"0":{"0":1,"1":1},"1":{"0":1,"1":1}} 

echo json_encode(array(array(1,1), array(1,1))); 
// Non-associative array output as array: "" (empty string)

The PHP version used on my server is 5.3.

How do I get a non-associative array output as array [[1,1],[1,1]]?

I can get it to work using your second code. It outputs "[[1,1],[1,1]]" — Guilherme Sehn
– Guilherme Sehn, Commented Sep 15, 2014 at 16:48
@MichaelBerkowski You forgot the PHP tags. However, this should work. — MC Emperor
– MC Emperor, Commented Sep 15, 2014 at 16:51
@MCEmperor wrong link copied. I changed it to 3v4l.org anyway... — Michael Berkowski
– Michael Berkowski, Commented Sep 15, 2014 at 16:52
there's no way json_encode would convert a non-empty array to an empty string. I'm calling PEBKAC. Even an empty array would encode as [], not "". — Marc B
– Marc B, Commented Sep 15, 2014 at 16:56

anonymous007 · Accepted Answer · 2017-08-10 12:14:27Z

1

Problem solved after PHP version upgraded to >=5.5

answered Aug 10, 2017 at 12:14

anonymous007

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