I am trying to json_encode an array which his var_dump gives:

   array(3) {
      [1]=>
      array(3) {
        ["comment_id"]=>
        string(1) "1"
        ["erasable"]=>
        string(1) "1"
        ["comment"]=>
        string(6) "test 1"
      }
      [2]=>
      array(3) {
        ["comment_id"]=>
        string(1) "2"
        ["erasable"]=>
        string(1) "1"
        ["comment"]=>
        string(6) "test 1"
      }
      [3]=>
      array(3) {
        ["comment_id"]=>
        string(1) "3"
        ["erasable"]=>
        string(1) "1"
        ["comment"]=>
        string(6) "jhghjg"
      }
    }

The encoded string looks:

 {"1":{"comment_id":"1","erasable":"1","comment":"test 1"},
     "2":{"comment_id":"2","erasable":"1","comment":"test 1"},
     "3":{"comment_id":"3","erasable":"1","comment":"jhghjg"}}

While I need it as:

 [{"comment_id":"1","erasable":"1","comment":"test 1"},
    {"comment_id":"2","erasable":"1","comment":"test 1"},
    {"comment_id":"3","erasable":"1","comment":"jhghjg"}]

As the php.ini/json__encode documentation says it should.
Any ideas?

    Your array is clearly being rendered in the fashion you are showing above. You have an associative array with numbers as keys (1-3) with sub elements. Now, if you restructure your array like this, I seem to get what you were looking for:

    $array = array(
	array("comment_id"=>"1","erasable"=>"1","comment"=>"test 1"), 
	array("comment_id"=>"2","erasable"=>"1","comment"=>"test 1"),
	array("comment_id"=>"3","erasable"=>"1","comment"=>"jhghjg")
);

    Now we have a non-associative array with associative arrays within.

    print_r($array);

    renders:

    Array
(
    [0] => Array
        (
            [comment_id] => 1
            [erasable] => 1
            [comment] => test 1
        )

[1] => Array
    (
        [comment_id] => 2
        [erasable] => 1
        [comment] => test 1
    )

[2] => Array
    (
        [comment_id] => 3
        [erasable] => 1
        [comment] => jhghjg
    )

)

    echo json_encode($array);

    renders:

    [{"comment_id":"1","erasable":"1","comment":"test 1"},
{"comment_id":"2","erasable":"1","comment":"test 1"},
{"comment_id":"3","erasable":"1","comment":"jhghjg"}]
      9 years later

      I'm having an almost similar problem where json_encode is all of a sudden ignoring the arrays. I built the arrays in php and passed it to the JavaScript variables:

      <?php /*?>
		$id[] = $row['id'];
		$book[] = $row['book'];		
		$bookTitle[] = $row['book_title'];
		$recordType[] = $row['recordType'];		
		$chapter[] = $row['chapter'];
		$verse[] = $row['verse'];
		$bookSpoke[] = $row['book_spoke']; 
		$chapterSpoke[] = $row['chapter_spoke']; 
		$verseSpoke[] = $row['verse_spoke'];
		$textData[] = $row['text_data'];		
		$strongs[] = $row['strongs'];
		$transliteration[] = $row['transliteration'];
		$etymology[] = $row['etymology'];
		$etymStrongs[] = $row['etym_strongs'];
		$etymDesc[] = lcfirst($row['etym_desc']);
		$hebWord[] = hebrevc($row['heb_word']);
		$added[] = $row['added'];
		$also[] = $row['also'];
<?php */?>	

var js_text1 = <?php echo json_encode($js_text1); ?>;

var js_text2 = <?php echo json_encode($js_text2); ?>;

<?php /*?> 
	0	$i, 
	1	$newStrongsResult[$i], 
	2	$joinedTextData, 
	3	count($searchStrongs_textData[$i]), 
	4	$joined_Transliteration_Hebrewword_Strongs_etymDesc, 
	5	$searchStrongs_added[0], 
	6	$searchStrongs_also[0], 
	7	$colors[$i]
<?php */?>

var js_data = <?php echo json_encode($js_data); ?>;

var js_newStrongsResult = [<?php echo '"'.implode('","', $newStrongsResult).'"' ?>]; //$php_array
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