Challenges with UTF-8 in JavaScript when Parsing JSON

Question

Challenges with UTF-8 in JavaScript when Parsing JSON

I'm currently facing an issue with a page I have set up to make requests to a php file through AJAX. The AJAX file returns a JSON response, but I'm encountering some problems.

The page is using UTF-8 charset for displaying special characters, while the default encoding of the AJAX file was ANSI. To ensure consistency and display correct symbols, I changed the encoding of the AJAX file to UTF-8. However, when using JSON.parse on the response, it throws an error "Uncaught SyntaxError: Unexpected token" if the AJAX file is encoded as UTF-8. Interestingly, changing back to ANSI encoding resolves this issue, although both outputs appear identical in xhr.responseText (without even using special characters in UTF-8).

Could it be that JSON.parse has trouble accepting responses from UTF-8 files? Or is there possibly a header setting required to address this issue? Your insights would be greatly appreciated. Thank you.

javascript ajax json character-encoding xmlhttprequest

Answer 1

Answer №1

When I encountered a similar issue, I decided to use alternative encode functions instead of the standard one. This approach yielded the desired outcome for me.

function custom_json_encode_utf8($arr) {
  array_walk_recursive($arr, 'custom_encode_utf8');
  return mb_decode_numericentity(json_encode($arr), array(0x80, 0xffff, 0, 0xffff), 'UTF-8');
}

function custom_encode_utf8(&$item, $key) {
  if (is_string($item))
    $item = mb_encode_numericentity($item, array(0x80, 0xffff, 0, 0xffff), 'UTF-8');
}

$team_members = array('Sophia Müller');

$team_members_json = custom_json_encode_utf8($team_members);

Answer 2

When I encountered a similar issue, I decided to use alternative encode functions instead of the standard one. This approach yielded the desired outcome for me.

function custom_json_encode_utf8($arr) {
  array_walk_recursive($arr, 'custom_encode_utf8');
  return mb_decode_numericentity(json_encode($arr), array(0x80, 0xffff, 0, 0xffff), 'UTF-8');
}

function custom_encode_utf8(&$item, $key) {
  if (is_string($item))
    $item = mb_encode_numericentity($item, array(0x80, 0xffff, 0, 0xffff), 'UTF-8');
}

$team_members = array('Sophia Müller');

$team_members_json = custom_json_encode_utf8($team_members);

Challenges with UTF-8 in JavaScript when Parsing JSON

Answer №1

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