PHPJSON_DECODE/JSON_ENCODE: The Chinese content is NULL or garbled

When using json data, many of my friends may use the JSON_DECODEJSON_ENCODE function of php to process Chinese content, which may cause NULL or garbled characters. what can I introduce to you below?

Many friends may encounter NULL or garbled characters when using the JSON_DECODE/JSON_ENCODE function of php to process Chinese content when using json data, next I will introduce to you why this problem occurs, for example:

2. $ Json = '{"a": 1, "B": 2, "c": 3, "d": 4, "e": 5 }';
3. Var_dump (json_decode ($ json ));
4. Var_dump (json_decode ($ json, true ));
5. ?>

Output result

Object (stdClass) #1 (5) {["a"] => int (1) ["B"] => int (2) ["c"] => int (3) ["d"] => int (4) ["e"] => int (5)} array (5) {["a"] => int (1) ["B"] => int (2) ["c"] => int (3) ["d"] => int (4) ["e"] => int (5 )}

If it is completely correct and there is no problem, we test the Chinese language and the code is as follows:

2. $ Json = '{"a": ""}';
3. Var_dump (json_decode ($ json ));
4. ?>

Result: {"text": null, "status": 1}. it was obtained from the php manual that json_encode and json_decode only support UTF-8 characters, the GBK character must be converted to json, so that we can easily convert it.

The code for converting an encoding is as follows:

1. /*
2. The string GBK is transcoded to a UTF-8, and the number is converted to a number.
3. */
4. Function ct2 ($ s ){
5. If (is_numeric ($ s )){
6. Return intval ($ s );
7. } Else {
8. Return iconv ("GBK", "UTF-8", $ s );
9. }
10. }
11. /*
12. Batch processing gbk-> UTF-8
13. */
14. Function icon_to_utf8 ($ s ){
15. If (is_array ($ s )){
16. Foreach ($ s as $ key => $ val ){
17. $ S [$ key] = icon_to_utf8 ($ val );
18. }
19. } Else {
20. $ S = ct2 ($ s );
21. }
22. Return $ s;
23. }
24. Echo json_encode (icon_to_utf8 ("Xiamen "));

In this case, there are still some problems. later I found a method to process all the content in the array using urlencode () before json_encode, and then convert it to a json string using json_encode, finally, urldecode () is used to convert the encoded Chinese characters and write a function:

1. /*************************************** ***********************
2. *
3. * Use a specific function to process all elements in the array
4. * @ Param string & $ array the string to be processed
5. * @ Param string $ function the function to be executed
6. * @ Return boolean $ apply_to_keys_also whether it is also applied to the key
7. * @ Access public
8. *
9. **************************************** *********************/
10. Function arrayRecursive (& $ array, $ function, $ apply_to_keys_also = false)
11. {
12. Foreach ($ array as $ key => $ value ){
13. If (is_array ($ value )){
14. ArrayRecursive ($ array [$ key], $ function, $ apply_to_keys_also );
15. } Else {
16. $ Array [$ key] = $ function ($ value );
17. }
18. If ($ apply_to_keys_also & is_string ($ key )){
19. $ New_key = $ function ($ key );
20. If ($ new_key! = $ Key ){
21. $ Array [$ new_key] = $ array [$ key];
22. Unset ($ array [$ key]);
23. }
24. }
25. }
26. }
27. /*************************************** ***********************
28. *
29. * Convert an array to a JSON string (compatible with Chinese characters)
30. * @ Param array $ array the array to be converted
31. * @ Return string the converted json string
32. * @ Access public
33. *
34. **************************************** *********************/
35. Function JSON ($ array ){
36. ArrayRecursive ($ array, 'urlencode', true );
37. $ Json = json_encode ($ array );
38. Return urldecode ($ json );
39. }