The phpjson_encode () function returns the json data instance code.

Php uses the json_encode () function to return json data. this function generates a standard json format data. The example code is as follows: json_encode () function usage.

Echo json_encode (array ('a' => 'bbbbb', 'C' => 'ddddd ');

In this way, a standard json format data is generated.

The code is as follows:

<? Php // SQL statement to be executed // Single $ SQL = "select id, name from tbl_user where id = 1 "; // multiple data records // $ SQL = "select id, name from tbl_user"; // call conn. php file for database operation require ('Conn. php '); // The message indicating successful operation is displayed. note: $ result exists in conn. in the php file, if ($ result) {// $ array = mysql_fetch_array ($ result, MYSQL_ASSOC);/* dataset $ users = array (); $ I = 0; while ($ row = mysql_fetch_array ($ result, MYSQL_ASSOC) {echo $ row ['id']. '-----------'. $ row ['name'].'
'; $ Users [$ I] = $ row; $ I ++;} echo json_encode (array ('datalist' => $ users )); * // * single data entry */$ row = mysql_fetch_row ($ result, MYSQL_ASSOC); echo json_encode (array ('jsonobj '=> $ row ));} mysql_free_result ($ result); // release result mysql_close (); // close the connection?>

The above is the json data generated by the database.

Single data entry: {"jsonObj": {"id": "1", "name": "lmw "}}

Multiple data entries: {"dataList": [{"id": "1", "name": "lmw" },{ "id": "2 ", "name": "xxj" },{ "id": "3", "name": "xxxj"}]}

In many cases, the program needs to return a result in Json format, for example:

The code is as follows:

The code is as follows:

{
"UserKeyGetResponse ":
{"RequestName": "e99e6d63e8c712d7699f52978a", "api_key_value": "41954dd9b1cb6a95802eab6810 "},
"Error_response ":
{"Code": "NO_ERROR (www.jb51.net)", "msg": "system parameter retrieved "}
}

You can write the result as an array:

The code is as follows:

$ Respon = array ('userkeygetresponse' => array ('requestname' => $ api_request_name, 'api _ key_value '=> $ api_key_value ),
'Error _ response' => array ('code' => 'No _ error', 'MSG '=> 'system parameter Retrieved successfully '));

Code

The code is as follows:

Function arrayRecursive (& $ array, $ function, $ apply_to_keys_also = false)
{
Static $ recursive_counter = 0;
If (++ $ recursive_counter> 1000 ){
Die ('possible deep recursion attack ');
}
Foreach ($ array as $ key => $ value ){
If (is_array ($ value )){
ArrayRecursive ($ array [$ key], $ function, $ apply_to_keys_also );
} Else {
$ Array [$ key] = $ function ($ value );
}
If ($ apply_to_keys_also & is_string ($ key )){
$ New_key = $ function ($ key );
If ($ new_key! = $ Key ){
$ Array [$ new_key] = $ array [$ key];
Unset ($ array [$ key]);
}
}
}
$ Recursive_counter --;
}
G:
$ Error_respon = array ('code' => 'Error _ MSG_MISS ', 'MSG' => 'message nonexistent ');
Echo JSON ($ array );

Result:

{"Code": "ERROR_MSG_MISS", "msg": "The message does not exist "}
The client can parse this result. of course, the error code should be replaced by a number.

This is much better. we can display Chinese characters directly. of course, it is okay to display the hexadecimal encoding.