json_encode将字符串转换为null

Question

I have posts that save with html tags from a wysiwyg editor.

I want the json output to be stripped of all html tags.

Because strip_tags can sometimes remove the text, I'm using preg_replace like so:

$body = $row['content'];        
//$body = strip_tags($body);
$body =  preg_replace("/<img[^>]+\>/i", "", $body);
$regex_strip_tags = "/<[\/\!]*?[^<>]*?>/";
$body = preg_replace($regex_strip_tags, '' , $body);

stash it in an array:

$arr[] = array('body' => $body);

The problem is that when I echo json_encode($arr) some entries appear null but if I use print_r($arr) I see everything as intended.

Not sure what's going on here.

Answer 1

Make sure to UTF-8 encode your string data before passing it into json_encode. Here is some more information on that.

PHP json_encode.