What to note in PHP Json_encode functions

Using Json_encode () built-in functions in PHP can be used to better communicate and use data in PHP with other languages.

The function is to convert an array into a JSON data storage format:

1 <?php2     $arr =array (' name ' = ' Balla_ rabbit ', ' age ' =>22); 3     echo Json_encode ($arr); 4?>

Output Result:

1 {"Name": "", "Age": 22}

The Json_encode function in Chinese is encoded as NULL, check the information, very simple, in order to closely integrate with the front end, JSON only support UTF-8 encoding.

We can use the Iconv function to convert the following code:

1 string iconv (String $in _charset, String $out _charset, String $str) 2 performs a character set conversion on the Stri Ng str from In_charset to out_charset.//conversion from In_charset encoding to OUT_CHARSET,STR

1 <?php2     $arr =array (' name ' =>iconv (' GBK ', ' utf-8 ', ' Balla_ Rabbit '), ' age ' =>22); 3     echo Json_encode ($arr) ; 4?>

Output Result:

1 {"Name": "Balla_\u934f\u65bf\u74d9", "Age": 22}

All Chinese in the array are missing after the Json_encode or appear \u934f\u65bf\ and so on.

The solution is to use the UrlEncode () function, and before Json_encode, all the contents of all the arrays are processed with UrlEncode (), and then converted to a JSON string with Json_encode () and then UrlDecode (). Turn the encoded Chinese back.

1 string  UrlEncode (String $str)//urlencode: Returns the string as a URL-encoded return value: string

1 <?php 2      3     $arr =array (' name ' =>urlencode (' Balla_ rabbit '), ' age ' =>22); 4      5     $json =json_encode ($ ARR); 6  7     $result =json_decode ($json, true);//decode JSON and convert to array 8      9     Echo urldecode ($result [' name ']); 10 11? >

Output Result:

1 Balla_ Rabbits