Strange character when running json content type

Question

I am trying to return json content read from MySQL server. It should be easy, but there is a “strange” character that continues to appear at the beginning of the content.

I have two pages for returning content:

• kcb433.sytes.net/as/test.php?json=true&limit=6&input=d

  this test.php from a script written by Timothy Groves that converts an array to json output

• http://kcb433.sytes.net/k.php?k=4

  assumed that this one is the same

I tried to check it here jsonformatter.curiousconcept.com , but only page 1 is checked, page 2 says that it does not contain JSON data.

When accessing directly, both pages have no problems. Then what is the difference, why are both not checked?

Then I found this jsonformat.com page and tried the same thing. Page 1 was fine and page 2 was not, but, surprisingly, the data could be read. At first sight,

{"a":"b"}

may look good, but the character is ahead.

According to the online hex editor, this line value is higher (instead of 9 values, 10):

-- 7B 22 61 22 3A 22 62  22 7D

Echo json code on page 2:

header("Content-Type: application/json");
echo "{\"a\":\"b\"}";

Answer 1

In your file k.php signature specification at the beginning, save k.phpagain with UTF8 without specification.