json - PHP json_encode returns null value from unicode character

Question

I have the following array:

Array
(
    [BookDateID] => 4
    [HotelName] => Adams’ Inn
)

Output:

{"BookDateID":"4","HotelName":null}

Any magic?

BTW, I have an alternative solution by looping thru each array and have them mb_convert_encoding(str,'HTML-ENTITIES') but I want the character remains the same as I have to insert this into a DB.

foreach($array as $key=>$value){
    $array[$key] = mb_convert_encoding($value,'HTML-ENTITIES');
}

Answer 1

json_encode needs UTF-8 encoded data. Make sure the data is UTF-8 encoded; currently it's likely Latin-1 encoded. How to do this depends on where the data comes from. Read What Every Programmer Absolutely, Positively Needs To Know About Encodings And Character Sets To Work With Text and Handling Unicode Front To Back In A Web App.