Insert data from json to mysql table from php - php

Question

im trying to insert data into a table from a json file but the rows gets 0. not the value from json
DB
JSON code:
{
"posts": [{
"dr_DeviceID": "323",
"dr_UserLocalLat": "38.7482572",
"dr_UserLocalLong": " -9.1847516"
}]
}
$connection = mysql_connect("localhost", "***", "!*****!");
if (!$connection)
{
die('PHP Mysql database connection could not connect : ' . mysql_error());
}
$db_selected = mysql_select_db("*****", $connection);
$result=mysql_query("SELECT * FROM $tbl_name wHERE ad_IMEI=ad_IMEI ");
$i=0;
while($row=mysql_fetch_array($result)) {
$response[$i]['dr_DeviceID'] = $row['ad_IDDevice'];
$response[$i]['dr_UserLocalLat']= $row['user_location_lat'];
$response[$i]['dr_UserLocalLong']= $row['user_location_long'];
$data['posts'][$i] = $response[$i];
$i=$i+2;}
$json_string = json_encode($data);
$file = 'select.json';
file_put_contents($file, $json_string);
$jsondata = file_get_contents('select.json');
$obj = json_decode($jsondata, true);
$id = $obj['posts']['dr_DeviceID'];
$dr_UserLocalLat = $obj['posts']['dr_UserLocalLat'];
$dr_UserLocalLong = $obj['posts']['dr_UserLocalLong'];
$sqlj = "INSERT INTO $tbl_name1 (dr_DeviceID, dr_UserLocalLat, dr_UserLocalLong) VALUES('$dr_DeviceID', '$dr_UserLocalLat', '$dr_UserLocalLong')";
$result=mysql_query($sqlj,$connection);

Answer 1

The problem is that you're trying to access an array of objects as if it was a single one.
With this line here
$data['posts'][$i] = $response[$i];
you add an item to the $data['posts'] array. If your result had more than one row, the json example you've left above would be
{
"posts": [{
"dr_DeviceID": "323",
"dr_UserLocalLat": "38.7482572",
"dr_UserLocalLong": " -9.1847516"
},
{
"dr_DeviceID": "324",
"dr_UserLocalLat": "39.7482572",
"dr_UserLocalLong": " -19.1847516"
}]
}
So, when you decode your json afterwards, you get an array of objects. To access every item in the array, you need some loop cycle. Otherwise, to get the first item from the json, you would need to do
$obj['posts'][0]['dr_UserLocalLat'], instead of $obj['posts']['dr_UserLocalLat'].