PHP पक्ष के लिए आप श्रेणियों की सरणी कैसे प्राप्त कर सकते हैं और जेसन बना सकते हैं, तैयार बयानों के लिए यह है कि आप कैसे पूरा कर सकते हैं
$success = false;
try {
$DBH = new PDO("mysql:host=$host;dbname=$dbname", $user, $pass);
$success = true;
}
catch(PDOException $e) {
$response["success"] = 0;
$response["message"] = 'Connection failed: ' . $e->getMessage();
$response["data"]=null;
die(json_encode($response));
}
$query_categories = "SELECT category_name FROM categories";
try{
$sth = $sth->prepare($query_categories );
$success = true;
} catch(PDOException $e) {
$response["success"] = 0;
$response["message"] = 'Prepare failed: ' . $e->getMessage();
$response["data"]=null;
die(json_encode($response));
}
try{
$sth->execute();
$success = true;
} catch(PDOException $e) {
$response["success"] = 0;
$response["message"] = 'Execute failed: ' . $e->getMessage();
$response["data"]=null;
die(json_encode($response));
}
$categories = $sth->fetchAll(PDO::FETCH_COLUMN, 0);/* fetches all categories from db */
/* Output of $query_categories
Array
(
[0] => cat1
[1] => cat2
[2] => cat3
[3] => cat4
)
*/
/* json encode $query_categories
["cat1","cat2","cat3","cat4"]
*/
/* check if categories exist or not*/
if(empty($categories)){
$response["success"] = 0;
$response["message"] = "No categories found";
$response["data"]=null;
die(json_encode($response));
$connection = null;
}
if($success) {
$response["success"] = 1;
$response["message"] = "Kylie";
$response["data"]=$categories;
die(json_encode($response));
$connection = null;
/* output
{"success":0,"message":"Kylie","data":["cat1","cat2","cat3","cat4"]}
*/
} else {
$response["success"] = 2;/* don't where you are setting success to 2*/
$response["message"] = "something went wrong";
$response["data"]=null;
die(json_encode($response));
$connection = null;
}
} else {
$response["success"] = 3;/* don't where you are setting success to 3*/
$response["message"] = "Another brick in the wall";
$response["data"]=null;
die(json_encode($response));
$connection = null;
}
मैं जावा में अच्छा नहीं हूँ लेकिन यहाँ संदर्भ है JSON को पार्स कैसे करें और इसके मानों को एक ऐरे में कैसे बदलें?
/* store json string in the_json */
JSONObject myjson = new JSONObject(the_json);
JSONArray the_json_array = myjson.getJSONArray("data");
